451-00001C - LAIRD TECHNOLOGIES - Datasheet.Directory

Version 1.8

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Version

Date

Notes

Contributor(s)

Approver

1.0

24 June 2018

Initial Production Release

Raj Khatri

Jonathan Kaye

1.1

29 June 2018

Added certification and BT SIG information

Tom Smith

Jonathan Kaye

1.2

04 Sept 2018

Added new product photos; updated BT SIG and

Ordering information

Sue White

Jonathan Kaye

1.3

20 Sept 2018

Corrected antenna type for FlexPIFA / FlexNotch

in Table 25.

Mark Wolski

Sue White

1.4

03 Oct 2018

Added note re: no support for Nordic SDK.

Rikki Horrigan

Jonathan Kaye

1.5

13 Nov 2018

Updated Standby Doze ram retention to 256k

Raj Khatri

Sue White

1.6

03 Dec 2018

Updated FCC and IC regulatory sections.

Tom Smith

Jonathan Kaye

1.7

03 Dec 2018

Updated Logos and URLs.

Emily Petropoulos

Jonathan Kaye

1.8

22 Mar 2019

Fixed pin 48 typo – A1 changed to A10

Rick Tretow

Jonathan Kaye

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3 
© Copyright 2019 Laird Connectivity.  
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 Overview and Key Features ................................................................................................................................................... 4 
 Specification .......................................................................................................................................................................... 5 
 Hardware Specifications ........................................................................................................................................................ 9 
3.1 Block Diagram and Pin-out ........................................................................................................................................... 9 
3.2 Pin Definitions ............................................................................................................................................................ 10 
3.3 Electrical Specifications .............................................................................................................................................. 16 
3.4 Programmability ......................................................................................................................................................... 20 
 Power Consumption ............................................................................................................................................................ 21 
 Functional Description ......................................................................................................................................................... 24 
5.1 Power Management ................................................................................................................................................... 24 
5.2 BL654 Power Supply Options ..................................................................................................................................... 24 
5.3 Clocks and Timers ....................................................................................................................................................... 26 
5.4 Radio Frequency (RF) ................................................................................................................................................. 27 
5.5 NFC ............................................................................................................................................................................. 27 
5.6 UART Interface ........................................................................................................................................................... 28 
5.7 USB interface .............................................................................................................................................................. 29 
5.8 SPI Bus ........................................................................................................................................................................ 30 
5.9 I2C Interface ............................................................................................................................................................... 30 
5.10 General Purpose I/O, ADC, PWM and FREQ............................................................................................................... 31 
5.11 nRESET pin .................................................................................................................................................................. 32 
5.12 Two-wire Interface JTAG ............................................................................................................................................ 32 
5.13 BL654 Wakeup ........................................................................................................................................................... 33 
5.14 Low Power Modes ...................................................................................................................................................... 33 
5.15 Temperature Sensor .................................................................................................................................................. 34 
5.16 Security/Privacy ......................................................................................................................................................... 34 
5.17 Optional External 32.768 kHz crystal ......................................................................................................................... 34 
5.18 451-00001 On-board PCB Antenna Characteristics ................................................................................................... 36 
5.19 451-00003 USB BLE 5.0 Dongle Mechnical Details .................................................................................................... 37 
 Hardware Integration Suggestions ...................................................................................................................................... 39 
6.1 Circuit ......................................................................................................................................................................... 39 
6.2 PCB Layout on Host PCB - General ............................................................................................................................. 41 
6.3 PCB Layout on Host PCB for the 451-00001 ............................................................................................................... 41 
6.4 External Antenna Integration with the 451-00002 .................................................................................................... 43 
 Mechanical Details .............................................................................................................................................................. 44 
 Application Note for Surface Mount Modules .................................................................................................................... 46 
8.1 Introduction ............................................................................................................................................................... 46 
8.2 Shipping ...................................................................................................................................................................... 46 
8.3 Reflow Parameters ..................................................................................................................................................... 49 
 FCC and IC Regulatory Statements ...................................................................................................................................... 51 
 Japan (MIC) Regulatory ....................................................................................................................................................... 55 
 CE Regulatory ...................................................................................................................................................................... 56 
 Ordering Information .......................................................................................................................................................... 59 
 Bluetooth SIG Qualification ................................................................................................................................................. 59 
 Additional Assistance .......................................................................................................................................................... 62 
 

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Every BL654 Series module is designed to simplify OEMs enablement of Bluetooth Low

Energy (BLE) v5.0 and Thread (802.15.4) to small, portable, power-conscious devices.

The BL654 provides engineers with considerable design flexibility in both hardware and

software programming capabilities. Based on the world-leading Nordic Semiconductor

nRF52840 chipset, the BL654 modules provide ultra-low power consumption with

outstanding wireless range via +8 dBm of transmit power and the Long Range (CODED

PHY) Bluetooth 5 feature. The BL654 is programmable via Laird’s smartBASIC language

or Nordic’s software development kit (SDK).

smartBASIC is an event-driven programming language that is highly optimized for memory-constrained systems such as

embedded modules. It was designed to make BLE development quicker and simpler, vastly cutting down time to market.

The Nordic SDK, on the other hand, offers developers source code (in C) and precompiled libraries containing BLE and ANT+

device profiles, wireless communication, as well as application examples.

Note: BL654 hardware provides all functionality of the nRF52840 chipset used in the module design. This is a hardware

datasheet only – it does not cover the software aspects of the BL654.

For customers using smartBASIC, refer to the smartBASIC extensions guide (available from the BL654 product page

of the Laird website. For customers using the Nordic SDK, refer to www.nordicsemi.com.

Note: Nordic SDK is not supported on the BL654 USB dongle, part #451-00003.

▪ Bluetooth v5.0 – Single mode

▪ NFC

▪ 802.15.4 (Thread) radio support

▪ External or internal antennas

▪ Multiple programming options

– smartBASIC AT command set shim or

– Nordic SDK in C

▪ Compact footprint

▪ Programmable Tx power +8 dBm to -20 dBm, -40dBm

▪ Rx sensitivity – -95 dBm (1Mbps), - 103dBm (125kbps)

▪ Ultra-low power consumption

▪ Tx – 4.8 mA peak (at 0 dBm, DCDC on)

(See Note 1 in the Power Consumption section)

▪ Rx: 4.6 mA peak (DCDC on)

(See Note 1 in the Power Consumption section)

▪ Standby Doze – 3.1 uA typical

▪ Deep Sleep – 0.4 uA – (See Note 4 in the Power

Consumption section)

▪ UART, GPIO, ADC, PWM, FREQ output, timers, I2C,

SPI, I2S, PDM, and USB interfaces

▪ Fast time-to-market

▪ FCC, CE, IC, RCM and Japan certified

▪ Full Bluetooth Declaration ID

▪ Other regulatory certifications on request

▪ No external components required

▪ Industrial temperature range (-40° C to +85° C)

▪ Medical devices

▪ IoT Sensors

▪ Fitness sensors

▪ Location awareness

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▪ Appcessories

▪ Home automation

Categories/Feature

Implementation

Wireless Specification

Bluetooth®

▪ BT 5.0 – Single mode

▪ 4x Range (CODED PHY support) – BT 5.0

▪ 2x Speed (2M PHY support) – BT 5.0

▪ LE Advertising Extensions – BT 5.0

▪ Concurrent master, slave

▪ BLE Mesh capabilities

▪ Diffie-Hellman based pairing (LE Secure Connections) – BT 4.2

▪ Data Packet Length Extension – BT 4.2

▪ Link Layer Privacy (LE Privacy 1.2) – BT 4.2

▪ LE Dual Mode Topology – BT 4.1

▪ LE Ping – BT 4.1

Frequency

2.402 - 2.480 GHz

Raw Data Rates

1 Mbps BLE (over-the-air)

2 Mbps BLE (over-the-air)

125 kbps BLE (over-the-air)

500 kbps BLE (over-the-air)

Maximum Transmit Power Setting

+8 dBm

Conducted 451-00001 (Integrated antenna)

+8 dBm

Conducted 451-00002 (External antenna)

Minimum Transmit Power Setting

-40 dBm, -20 dBm (in 4 dB steps)

-16 dBm, -12 dBm, - 8 dBm, - 4 dBm, 0 dBm, 2 dBm, 4 dBm, 5 dBm, 6 dBm, 7 dBm,

Receive Sensitivity (≤37byte

packet)

BLE 1 Mbps (BER=1E-3)

-95 dBm typical

BLE 2 Mbps

-92 dBm typical

BLE 125 kbps

-103 dBm typical

BLE 500 kbps

-99 dBm typical

Link Budget (conducted)

103 dB

@ BLE 1 Mbps

111 dB

@ BLE 125 kbps

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Categories/Feature

Implementation

NFC

NFC-A Listen mode compliant

Based on NFC forum specification

▪ 13.56 MHz

▪ Date rate 106 kbps

▪ NFC Type2 and Type 4 emulation

Modes of Operation:

▪ Disable

▪ Sense

▪ Activated

Use Cases:

▪ Touch-to-Pair with NFC

▪ NFC enabled Out-of-Band Pairing

System Wake-On-Field function

Proximity Detection

Host Interfaces and Peripherals

Total

48 x multifunction I/O lines

UART

2 UARTs

Tx, Rx, CTS, RTS

DCD, RI, DTR, DSR (See Note 1 in the Module Specification Notes)

Default 115200, n, 8, 1

From 1,200 bps to 1 Mbps

USB

USB 2.0 FS (Full Speed, 12Mbps).

CDC driver / Virtual UART (baud rate TBD)

Other USB drivers available via Nordic SDK

GPIO

Up to 48, with configurable:

I/O direction,

O/P drive strength (standard 0.5 mA or high 3mA/5 mA),

Pull-up /pull-down

Input buffer disconnect

ADC

Eight 8/10/12-bit channels

0.6 V internal reference

Configurable 4, 2, 1, 1/2, 1/3, 1/4, 1/5 1/6(default) pre-scaling

Configurable acquisition time 3uS, 5uS, 10uS (default), 15uS, 20uS, 40uS.

One-shot mode

PWM Output

PWM outputs on 16 GPIO output pins.

▪ PWM output duty cycle: 0%-100%

▪ PWM output frequency: Up to 500kHz

FREQ Output

FREQ outputs on 16 GPIO output pins.

▪ FREQ output frequency: 0 MHz-4MHz (50% duty cycle)

I2C

Two I2C interface (up to 400 kbps) – See Note 2 in the Module Specification Notes

SPI

Four SPI Master Slave interface (up to 4 Mbps)

QSPI

One 32-MHz QSPI interface. Gives XIP (Execution in Place) capability.

External serial flash IC must be fitted as per Nordic specifications.

Temperature Sensor

One temperature sensor.

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Categories/Feature

Implementation

Temperature range equal to the operating temperature range.

Resolution 0.25 degrees.

RSSI Detector

One RF received signal strength indicator

±2 dB accuracy (valid over -90 to -20 dBm)

One dB resolution

I2S

One inter-IC sound interface

PDM

One pulse density modulation interface

Optional (External to the BL654 module)

External 32.768 kHz crystal

For customer use, connect +/-20ppm accuracy crystal for more accurate protocol

timing.

Profiles

Services supported

▪ Central Mode

▪ Peripheral Mode

▪ Mesh (with custom models)

▪ Custom and adopted profiles

Programmability

smartBASIC

FW upgrade via JTAG or UART

Application download via UART or Via Over-the-Air (if SIO_02 pin is pulled high

externally)

Nordic SDK

Via JTAG

Note: Nordic SDK is not supported on the BL654 USB dongle, part #451-00003.

Operating Modes

smartBASIC

Self-contained Run mode

Selected by nAutoRun pin status: LOW (0V).

Then runs $autorun$ (smartBASIC application script) if it exists.

Interactive/Development mode

HIGH (VDD).

Then runs via at+run (and file name of smartBASIC application script).

Nordic SDK

As per Nordic SDK

Note: Nordic SDK is not supported on the BL654 USB dongle, part #451-00003.

Supply Voltage

Supply (VDD or VDD_HV) options

▪ Normal voltage mode VDD 1.7- 3.6 V – Internal DCDC converter or LDO

(See Note 3 in the Module Specification Notes)

▪ High voltage mode VDD_HV 2.5V-5.5V Internal DCDC converter or LDO

(See Note 3 and Note 4 in the Module Specification Notes)

Power Consumption

Active Modes Peak Current (for

maximum Tx power +8 dBm)

– Radio only

14.8 mA peak Tx (with DCDC)

Active Modes Peak Current (for Tx

power -40 dBm) – Radio only

4.6 mA peak Tx (with DCDC)

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Categories/Feature

Implementation

Active Modes Average Current

Depends on many factors, see Power Consumption

Ultra-low Power Modes

Standby Doze

3.1 uA typical

Deep Sleep

0.4 uA

Antenna Options

Internal

Printed PCB monopole antenna – on-board

451-00001 variant

External

▪ Dipole antenna (with IPEX connector)

▪ Dipole PCB antenna (with IPEX connector)

▪ Connection via IPEX MH4 – 451-00002 variant

See the Antenna Information sections for FCC and IC, MIC, RCM and CE.

Physical

Dimensions

15.0 mm x 10 mm x 2.2 mm

Pad Pitch – 0.8 mm

Pad Type – Two rows of pads

Weight

<1 gram

Environmental

Operating

-40 ˚C to +85 ˚C

Storage

-40 ˚C to +85 ˚C

Miscellaneous

Lead Free

Lead-free and RoHS compliant

Warranty

One-Year Warranty

Development Tools

Development Kit

Development kit per module SKU (455-00001 and 455-00002) and free software tools

Approvals

Bluetooth®

Full Bluetooth SIG Declaration ID

FCC/IC/CE/MIC/RCM

All BL654 Series

Module Specification Notes:

Note 1

DSR, DTR, RI, and DCD can be implemented in the smartBASIC application or through the Nordic SDK.

Note: Nordic SDK is not supported on the BL654 USB dongle, part #451-00003.

Note 2

With I2C interface selected, pull-up resistors on I2C SDA and I2C SCL must be connected externally as per I2C

standard.

Note 3

Use of the internal DCDC convertor or LDO is decided by the underlying BLE stack.

Note 4

Nordic Errata 197 and 202 related to the use of VDD_HV DCDC convertor, for details refer to

http://infocenter.nordicsemi.com/pdf/nRF52840_Rev_1_Errata_v1.1.pdf. Nordic Errata 202 means no

external current draw (from VDD pin) is allowed during power up and VDD_HV rise time (to 3V) is below 1mS.

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Figure 1: BL654 Block diagram

Figure 2: Functional HW and SW block diagram for BL654 series BLE module

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Figure 3: BL654 module pin-out (top view). Outer row pads (long red line) and inner row pads (short red line) shown.

Table 1: Pin definitions

Pin #

Pin Name

Default

Function

Alternate

Function

In/ Out

Pull

Up/

Down

nRF52840

QFN Pin

nRF52840

QFN Name

Comment

GND

SWDIO

PULL-

AC24

SWDIO

SIO_36

PULL-

U24

P1.04

SWDCLK

PULL-

DOWN

AA24

SWDCLK

SIO_34

PULL-

W24

P1.02

SIO_35/

nAutoRUN

SIO_35

PULL-

DOWN

V23

P1.03

Laird Devkit: FTDI

USB_DTR via jumper

on J12pin1-2.

SIO_33

PULL-

Y23

P1.01

SIO_32

PULL-

AD22

P1.00

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Pin #

Pin Name

Default

Function

Alternate

Function

In/ Out

Pull

Up/

Down

nRF52840

QFN Pin

nRF52840

QFN Name

Comment

SIO_25

PULL-

AC21

PO.25

Laird Devkit:

BUTTON1

SIO_23

QSPI_DIO3

PULL-

AC19

PO.23

SIO_24

PULL-

AD20

PO.24

Laird Devkit:

BUTTON3

SIO_22

QSPI_DIO2

PULL-

AD18

PO.22

SIO_21

QSPI_DIO1

PULL-

AC17

PO.21

SIO_20

QSPI_DIO0

PULL-

AD16

PO.20

SIO_19

QSPI_CLK

PULL-

AC15

PO.19

D+

AD6

D+

SIO_17

QSPI_CS

PULL-

AD12

PO.17

D-

AD4

D-

SIO_15

PULL-

AD10

PO.15

Laird Devkit: LED3

nRESET

SIO_18

PULL-

AC13

PO.18

System Reset (Active

Low)

SIO_13

PULL-

AD8

PO.13

Laird Devkit: LED1

SIO_16

PULL-

AC11

PO.16

Laird Devkit: LED4

SIO_14

PULL-

AC9

PO.14

Laird Devkit: LED2

GND

VBUS

4.35V – 5.5V

VDD_HV

2.5V to 5.5V

GND

SIO_11

PULL-

PO.11

Laird Devkit:

BUTTON1

SIO_12

PULL-

PO.12

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Pin #

Pin Name

Default

Function

Alternate

Function

In/ Out

Pull

Up/

Down

nRF52840

QFN Pin

nRF52840

QFN Name

Comment

SIO_08/

UART_RX

SIO_08

UART_RX

PULL-

PO.08

UARTCLOSE() selects

DIO functionality.

UARTOPEN() selects

UART COMMS

behavior

SIO_41/

SPI_CLK

SIO_41

SPI_CLK

PULL-

P1.09

Laird Devkit: SPI

EEPROM.

SPI_Eeprom_CLK,

Output:

SPIOPEN() in

smartBASIC selects SPI

function, MOSI and CLK

are outputs when in

SPI master mode.

VDD

1.7V to 3.6V

SIO_40/

SPI_MOSI

SIO_40

SPI_MOSI

PULL-

P1.08

Laird Devkit: SPI

EEPROM.

SPI_Eeprom_MOSI,

Output

SPIOPEN() in

smartBASIC selects SPI

function, MOSI and CLK

are outputs in SPI

master.

GND

SIO_04/

AIN2/

SPI_MISO

SIO_04

AIN2/

SPI_MISO

PULL-

PO.04/AIN2

Laird Devkit: SPI

EEPROM.

SPI_Eeprom_MISO,

Input.

SPIOPEN() in

smartBASIC selects SPI

function; MOSI and

CLK are outputs when

in SPI master mode

SIO_06/

UART_TX

SIO_06

UART_TX

OUT

Set

High

in FW

PO.06

UARTCLOSE() selects

DIO functionality.

UARTOPEN() selects

UART COMMS

behaviour

SIO_26/

I2C_SDA

SIO_26

I2C_SDA

PULL-

PO.26

Laird Devkit: I2C RTC

chip. I2C data line.

SIO_07/

UART_CTS

SIO_07

UART_CTS

PULL-

DOWN

PO.07

UARTCLOSE() selects

DIO functionality.

UARTOPEN() selects

UART COMMS

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Pin #

Pin Name

Default

Function

Alternate

Function

In/ Out

Pull

Up/

Down

nRF52840

QFN Pin

nRF52840

QFN Name

Comment

behaviour

SIO_27/

I2C_SCL

SIO_27

I2C_SCL

PULL-

PO.27

Laird Devkit: I2C RTC

chip. I2C clock line.

SIO_05/

UART_RTS/

AIN3

SIO_05

UART_RTS/

AIN3

OUT

Set

Low in

PO.05/AIN3

UARTCLOSE() selects

DIO functionality.

UARTOPEN() selects

UART COMMS

behaviour

GND

SIO_01/

XL2

SIO_01

XL2

PULL-

PO.01/XL2

Laird Devkit: Optional

32.768kHz crystal pad

XL2 and associated

load capacitor.

SIO_00/

XL1

SIO_00

XL1

PULL-

PO.00/XL1

Laird Devkit: Optional

32.768kHz crystal pad

XL1 and associated

load capacitor.

GND

SIO_31/

AIN7

SIO_31

AIN7

PULL-

PO.31/AIN7

SIO_30/

AIN6

SIO_30

AIN6

PULL-

PO.30/AIN6

SIO_28/

AIN4

SIO_28

AIN4

PULL-

B11

PO.28/AIN4

GND

SIO_29/

AIN5

SIO_29

AIN5

PULL-

A10

PO.29/AIN5

SIO_03/

AIN1

SIO_03

AIN1

PULL-

B13

PO.03/AIN1

Laird Devkit: Temp

Sens Analog

SIO_02/

AIN0

SIO_02

AIN0

PULL-

DOWN

A12

PO.02/AIN0

Internal pull-down. Pull

High externally to

enter VSP (Virtual

Serial Port) Service.

SIO_46

PULL-

B15

P1.14

GND

SIO_47

PULL-

A14

P1.15

SIO_44

PULL-

B17

P1.12

Laird Devkit: SPI

EEPROM.

SPI_Eeprom_CS, Input

GND

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Pin #

Pin Name

Default

Function

Alternate

Function

In/ Out

Pull

Up/

Down

nRF52840

QFN Pin

nRF52840

QFN Name

Comment

SIO_45

PULL-

A16

P1.13

NFC2/

SIO_10

NFC2

SIO_10

J24

PO.10/NFC2

GND

NFC1/

SIO_09

NFC1

SIO_09

L24

PO.09/NFC1

SIO_43

PULL-

B19

P1.11

SIO_37

PULL-

T23

P1.05

SIO_42

PULL-

A20

P1.10

SIO_38

N/C

PULL-

R24

P1.06

Reserved for future

use. Do not connect.

SIO_39

PULL-

P23

P1.07

GND

Pin Definition Notes:

Note 1

SIO = Signal Input or Output. Secondary function is selectable in smartBASIC application or via Nordic SDK. I/O

voltage level tracks VDD. AIN = Analog Input.

Note 2

At reset, all SIO lines are configured as the defaults shown above.

SIO lines can be configured through the smartBASIC application script to be either inputs or outputs with pull-

ups or pull-downs. When an alternative SIO function is selected (such as I2C or SPI), the firmware does not

allow the setup of internal pull-up/pull-down. Therefore, when I2C interface is selected, pull-up resistors on I2C

SDA and I2C SCL must be connected externally as per I2C standard.

Note 3

JTAG (two-wire SWD interface), pin 1 (SWDIO) and pin 3 (SWDCLK).

JTAG is required because Nordic SDK applications can only be loaded using JTAG (smartBASIC firmware can be

loaded using the JTAG as well as UART). We recommend that you use JTAG (2-wire interface) to handle future

BL654 module smartBASIC firmware upgrades. You MUST wire out the JTAG (2-wire interface) on your host

design (see Figure 7, where four lines (SWDIO, SWDCLK, GND and VDD) should be wired out. smartBASIC

firmware upgrades can still be performed over the BL654 UART interface, but this is slower (60 seconds using

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Pin Definition Notes:

UART vs. 10 seconds when using JTAG) than using the BL654 JTAG (2-wire interface).

Upgrading smartBASIC firmware or loading the smartBASIC applications is done using the UART interface.

Note 4

Pull the nRESET pin (pin 19) low for minimum 100 milliseconds to reset the BL654.

Note 5

The SIO_02 pin (pin 50) must be pulled high externally to enable VSP (Virtual Serial Port) which would allow

OTA (over-the-air) smartBASIC application download. Refer to the latest firmware release documentation for

details.

Note 6

Ensure that SIO_02 (pin 50) and AutoRUN (pin 5) are not both high (externally), in that state, the UART is

bridged to Virtual Serial Port service; the BL654 module does not respond to AT commands and cannot load

smartBASIC application scripts.

Note 7

Pin 5 (nAutoRUN) is an input, with active low logic. In the development kit it is connected so that the state is

driven by the host’s DTR output line. The nAutoRUN pin must be externally held high or low to select between

the following two BL654 operating modes:

▪ Self-contained Run mode (nAutoRUN pin held at 0V –this is the default (internal pull-down enabled))

▪ Interactive/Development mode (nAutoRUN pin held at VDD)

The smartBASIC firmware checks for the status of nAutoRUN during power-up or reset. If it is low and if there is

a smartBASIC application script named $autorun$, then the smartBASIC firmware executes the application

script automatically; hence the name Self-contained Run Mode.

Note 8

The smartBASIC firmware has SIO pins as Digital (Default Function) INPUT pins, which are set PULL-UP by

default. This avoids floating inputs (which can cause current consumption to drive with time in low power

modes (such as Standby Doze). You can disable the PULL-UP through your smartBASIC application.

All of the SIO pins (with a default function of DIO) are inputs (apart from SIO_05 and SIO_06, which are

outputs):

▪ SIO_06 (alternative function UART_TX) is an output, set High (in the firmware).

▪ SIO_05 (alternative function UART_RTS) is an output, set Low (in the firmware).

▪ SIO_08 (alternative function UART_RX) is an input, set with internal pull-up (in the firmware).

▪ SIO_07 (alternative function UART_CTS) is an input, set with internal pull-down (in the firmware).

▪ SIO_02 is an input set with internal pull-down (in the firmware). It is used for OTA downloading of

smartBASIC applications. Refer to the latest firmware extension documentation for details.

▪ UART_RX, UART_TX, and UART_CTS are 3.3 V level logic (if VDD is 3.3 V; such as SIO pin I/O levels track

VDD). For example, when Rx and Tx are idle, they sit at 3.3 V (if VDD is 3.3 V). Conversely, handshaking

pins CTS and RTS at 0V are treated as assertions.

Note 9

BL654 also allows as an option to connect an external higher accuracy (±20 ppm) 32.768 kHz crystal to the

BL654 pins SIO_01/XL2 (pin 41) and SIO_00/XL1 (pin 42). This provides higher accuracy protocol timing and

helps with radio power consumption in the system standby doze/deep sleep modes by reducing the time that

the Rx window must be open.

Note 10

Not required for BL654 module normal operation. The on-chip 32.768kHz LFRC oscillator provides the standard

accuracy of ±500 ppm, with calibration required every 8seconds (default) to stay within ±500 ppm.

BL654 power supply options:

▪ Option 1 – Normal voltage power supply mode entered when the external supply voltage is connected to

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Pin Definition Notes:

both the VDD and VDD_HV pins (so that VDD equals VDD_HV). Connect external supply within range 1.7V

to 3.6V range to BL654 VDD and VDD_HV pins.

▪ Option 2 – High voltage mode power supply mode (using BL654 VDD_HV pin) entered when the external

supply voltage in ONLY connected to the VDDH pin and the VDD pin is not connected to any external

voltage supply. Connect external supply within range 2.5V to 5.5V range to BL654 VDD_HV pin. BL654

VDD pin left unconnected.

Nordic Errata 197 and 202 related to the use of VDD_HV DCDC convertor, for details refer to

http://infocenter.nordicsemi.com/pdf/nRF52840_Rev_1_Errata_v1.1.pdf. Nordic Errata 202 means no

external current draw (from VDD pin) is allowed during power up and VDD_HV rise time (to 3V) is below

1mS.

▪ For either option, if you use USB interface then the BL654 VBUS pin must be connected to external supply

within the range 4.35V to 5.5V. When using the BL654 VBUS pin, you MUST externally fit a 4.7uF to

ground.

Absolute maximum ratings for supply voltage and voltages on digital and analogue pins of the module are listed below;

exceeding these values causes permanent damage.

Table 2: Maximum current ratings

Parameter

Min

Max

Unit

Voltage at VDD pin

-0.3

+3.9 (Note 1)

Voltage at VDD_HV pin

-0.3

+5.8

VBUS

-0.3

+5.8

Voltage at GND pin

Voltage at SIO pin (at VDD≤3.6V)

-0.3

VDD +0.3

Voltage at SIO pin (at VDD≥3.6V)

-0.3

3.9

NFC antenna pin current (NFC1/2)

Radio RF input level

dBm

Environmental

Storage temperature

-40

+85

ºC

MSL (Moisture Sensitivity Level)

ESD (as per EN301-489)

Conductive

Air Coupling

Flash Memory (Endurance) (Note 2)

10000

Write/erase cycles

Flash Memory (Retention)

10 years at 40°C

Maximum Ratings Notes:

Note 1

The absolute maximum rating for VDD_nRF pin (max) is 3.9V for the BL654.

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Note 2

Wear levelling is used in file system.

Table 3: Power supply operating parameters

Parameter

Min

Typ

Max

Unit

VDD (independent of DCDC)1 supply range

1.7

3.3

3.6

VDD_HV (independent of DCDC) supply range

2.5

3.7

5.5

VBUS USB supply range

4.35

5.5

VDD Maximum ripple or noise2

VDD supply rise time (0V to 1.7V)3

Time in Power

VDD_HV supply rise time (0V to 3.7V) 3

100

Operating Temperature Range

-40

+85

ºC

Recommended Operating Parameters Notes:

Note 1

4.7 uF internal to module on VDD. The internal DCDC convertor or LDO is decided by the underlying BLE stack.

Note 2

This is the maximum VDD or VDD_HV ripple or noise (at any frequency) that does not disturb the radio.

Note 3

The on-board power-on reset circuitry may not function properly for rise times longer than the specified

maximum.

Note 4

BL654 power supply options:

▪ Option 1 – Normal voltage power supply mode entered when the external supply voltage is connected to

both the VDD and VDD_HV pins (so that VDD equals VDD_HV). Connect external supply within range 1.7V

to 3.6V range to BL654 VDD and VDD_HV pins.

▪ Option 2 – High voltage mode power supply mode (using BL654 VDD_HV pin) entered when the external

supply voltage in ONLY connected to the VDD_HV pin and the VDD pin is not connected to any external

voltage supply. Connect external supply within range 2.5V to 5.5V range to BL654 VDD_HV pin. BL654

VDD pin left unconnected.

Nordic Errata 197 and 202 related to the use of VDD_HV DCDC convertor, for details refer to

http://infocenter.nordicsemi.com/pdf/nRF52840_Rev_1_Errata_v1.1.pdf. Nordic Errata 202 means no

external current draw (from VDD pin) is allowed during power up and VDD_HV rise time (to 3V) is below 1

millisecond.

▪ For either option, if you use USB interface then the BL654 VBUS pin must be connected to external supply

within the range 4.35V to 5.5V. When using the BL654 VBUS pin, you MUST externally fit a 4.7uF to

ground.

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Table 4: Signal levels for interface, SIO

Parameter

Min

Typ

Max

Unit

VIH Input high voltage

0.7 VDD

VDD

VIL Input low voltage

VSS

0.3 x VDD

VOH Output high voltage

(std. drive, 0.5mA) (Note 1)

(high-drive, 3mA) (Note 1)

(high-drive, 5mA) (Note 2)

VDD -0.4

VDD

VOL Output low voltage

(std. drive, 0.5mA) (Note 1)

(high-drive, 3mA) (Note 1)

(high-drive, 5mA) (Note 2)

VSS

VSS+0.4

VOL Current at VSS+0.4V, Output set low

(std. drive, 0.5mA) (Note 1)

(high-drive, 3mA) (Note 1)

(high-drive, 5mA) (Note 2)

VOL Current at VDD -0.4, Output set low

(std. drive, 0.5mA) (Note 1)

(high-drive, 3mA) (Note 1)

(high-drive, 5mA) (Note 2)

Pull up resistance

kΩ

Pull down resistance

kΩ

Pad capacitance

Pad capacitance at NFC pads

Signal Levels Notes:

Note 1

For VDD≥1.7V. The firmware supports high drive (3 mA, as well as standard drive).

Note 2

For VDD≥2.7V. The firmware supports high drive (5 mA (since VDD≥2.7V), as well as standard drive).

The GPIO (SIO) high reference voltage always equals the level on the VDD pin.

▪ Normal voltage mode – The GPIO high level equals the voltage supplied to the VDD pin

▪ High voltage mode – The GPIO high level equals the level specified (is configurable to 1.8V, 2.1V, 2.4V,

2.7V, 3.0V, and 3.3V. The default voltage is 1.8V). In High voltage mode, the VDD pin becomes an

output voltage pin. The VDD output voltage and hence the GPIO is configurable from 1.8V to 3.3V with

possible settings of 1.8V, 2.1V, 2.4V, 2.7V, 3.0V, and 3.3V. Refer to Table 15 for additional details.

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Table 5: SIO pin alternative function AIN (ADC) specification

Parameter

Min

Typ

Max

Unit

Maximum sample rate

200

kHz

ADC Internal reference voltage

-1.5%

0.6 V

+1.5%

ADC pin input

internal selectable scaling

4, 2, 1, 1/2,

1/3, 1/4, 1/5

1/6

scaling

ADC input pin (AIN) voltage maximum without

damaging ADC w.r.t (see Note 1)

VCC Prescaling

0V-VDD 4, 2, 1, ½, 1/3, ¼, 1/5, 1/6

VDD+0.3

Configurable

Resolution

8-bit mode

10-bit mode

12-bit mode

bits

Configurable (see Note 2)

Acquisition Time, source resistance ≤10kΩ

Acquisition Time, source resistance ≤40kΩ

Acquisition Time, source resistance ≤100kΩ

Acquisition Time, source resistance ≤200kΩ

Acquisition Time, source resistance ≤400kΩ

Acquisition Time, source resistance ≤800kΩ

Conversion Time (see Note 3)

ADC input impedance (during operation) (see Note 3)

Input Resistance

Sample and hold capacitance at maximum gain

2.5

MOhm

Recommended Operating Parameters Notes:

Note 1

Stay within internal 0.6 V reference voltage with given pre-scaling on AIN pin and do not violate ADC maximum

input voltage (for damage) for a given VCC, e.g. If VDD is 3.6V, you can only expose AIN pin to VDD+0.3 V.

Default pre-scaling is 1/6 which configurable via smartBASIC.

Note 2

Firmware allows configurable resolution (8-bit, 10-bit or 12-bit mode) and acquisition time. BL654 ADC is a

Successive Approximation type ADC (SSADC), as a result no external capacitor is needed for ADC operation.

Configure the acquisition time according to the source resistance that customer has.

The sampling frequency is limited by the sum of sampling time and acquisition time. The maximum sampling

time is 2us. For acquisition time of 3us the total conversion time is therefore 5us, which makes maximum

sampling frequency of 1/5us = 200kHz. Similarly, if acquisition time of 40us chosen, then the conversion time is

42us and the maximum sampling frequency is 1/42us = 23.8kHz.

Note 3

ADC input impedance is estimated mean impedance of the ADC (AIN) pins.

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3.4.1 BL654 Default Firmware

The BL654 module comes loaded with smartBASIC firmware but does not come loaded with any smartBASIC application

script (as that is dependent on customer-end application or use). Laird provides many sample smartBASIC application scripts

via a sample application folder on GitHub – https://github.com/LairdCP/BL654-Applications

Therefore, it boots into AT command mode by default.

Refer to the smartBASIC extension manual for details of functionality connected to this:

▪ nAutoRUN pin (SIO_35), see Table 6 for default

▪ VSP pin (SIO_02), see Table 7 for default

▪ SIO_38 – Reserved for future use. Do not connect. See Table 8

Table 6: nAutoRUN pin

Signal Name

Pin #

I/O

Comments

nAutoRUN /(SIO_35)

Input with active low logic. Internal pull down (default).

Operating mode selected by nAutoRun pin status:

▪ Self-contained Run mode (nAutoRUN pin held at 0V).

▪ If Low (0V), runs $autorun$ if it exists

▪ Interactive/Development mode (nAutoRUN pin held at VCC).

▪ If High (VCC), runs via at+run (and file name of application)

In the development board nAutoRUN pin is connected so that the state is driven by the host’s DTR output line.

Table 7: VSP mode

Signal Name

Pin #

I/O

Comments

SIO_02

Internal pull down (default).

VSP mode selected by externally pulling-up SIO_02 pin:

High (VCC), then OTA smart BASIC application download is possible.

Table 8: SIO_38

Signal Name

Pin #

I/O

Comments

SIO_38

Internal pull up (default).

Reserved for future use. Do not connect if using smartBASIC FW.

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Data at VDD of 3.3 V with internal (to chipset) LDO ON or with internal (to chipset) DCDC ON (see Power Consumption

Note 1) and 25ºC.

Table 9: Power consumption

Parameter

Min

Typ

Max

Unit

Active mode ‘peak’ current (Note 1)

(Advertising or Connection)

Tx only run peak current @ Txpwr = +8 dBm

Tx only run peak current @ Txpwr = +4 dBm

Tx only run peak current @ Txpwr = 0 dBm

Tx only run peak current @ Txpwr = -4 dBm

Tx only run peak current @ Txpwr = -8 dBm

Tx only run peak current @ Txpwr = -12 dBm

Tx only run peak current @ Txpwr = -16 dBm

Tx only run peak current @ Txpwr = -20 dBm

Tx only run peak current @ Txpwr = -40 dBm

With DCDC [with LDO]

14.8 [32.7]

9.6 [21.4]

4.8 [10.6]

3.1 [8.1]

3.3 [7.2]

3.0 [6.4]

2.8 [6.0]

2.7 [5.6]

2.3 [4.6]

Active Mode

Rx only ‘peak’ current, BLE 1Mbps (Note 1)

Rx only ‘peak’ current, BLE 2Mbps (Note 2)

4.6 [9.9]

5.2 [11.1]

Ultra-Low Power Mode 1 (Note 2)

Standby Doze, 256k RAM retention

3.1

Ultra-Low Power Mode 2 (Note 3)

Deep Sleep (no RAM retention)

0.4

Active Mode Average current (Note 4)

Advertising Average Current draw

Max, with advertising interval (min) 20 mS

Min, with advertising interval (max) 10240 mS

Connection Average Current draw

Max, with connection interval (min) 7.5 mS

Min, with connection interval (max) 4000 mS

Note4

Power Consumption Notes:

Note 1

This is for Peak Radio Current only, but there is additional current due to the MCU. The internal DCDC

convertor or LDO is decided by the underlying BLE stack.

Note 2

BL654 modules Standby Doze is 3.1 uA typical. When using smartBASIC firmware, Standby Doze is entered

automatically (when a waitevent statement is encountered within a smartBASIC application script). In Standby

Doze, all peripherals that are enabled stay on and may re-awaken the chip. Depending on active peripherals,

current consumption ranges from 3.1 μA to 370 uA (when UART is ON). See individual peripherals current

consumption data in the Peripheral Block Current Consumption section. smartBASIC

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Power Consumption Notes:

firmware has functionality to detect GPIO change with no current consumption cost, it is

possible to close the UART and get to the 3.1 uA current consumption regime and still be able to

detect for incoming data and be woken up so that the UART can be re-opened at expense of losing

that first character.

The BL654 Standby Doze current consists of the below nRF52840 blocks:

▪ nRF52 System ON IDLE current (no RAM retention) (0.7 uA) – This is the base current of the CPU

▪ LFRC (0.7 uA) and RTC (0.1uA) running as well as 256k RAM retention (1.4 uA) – This adds to the total of

3.1 uA typical. The RAM retention is 20nA per 4k block, but this can vary to 30nA per 4k block which

would make the total 3.7uA.

Note 3

In Deep Sleep, everything is disabled and the only wake-up sources (including NFC to wakeup) are reset and

changes on SIO or NFC pins on which sense is enabled. The current consumption seen is ~0.4 uA typical in

BL654 modules.

▪ Coming out from Deep Sleep to Standby Doze through the reset vector.

Note 4

Average current consumption depends on several factors (including Tx power, VCC, accuracy of 32MHz and

32.768 kHz). With these factors fixed, the largest variable is the advertising or connection interval set.

Advertising Interval range:

▪ 20 milliseconds to 10240 mS (10485759.375 mS in BT5.0) in multiples of 0.625 milliseconds.

For an advertising event:

▪ The minimum average current consumption is when the advertising interval is large 10240 mS

(10485759.375 mS (in BT5.0) although this may cause long discover times (for the advertising event) by

scanners

▪ The maximum average current consumption is when the advertising interval is small 20 mS

Other factors that are also related to average current consumption include the advertising payload bytes

in each advertising packet and whether it’s continuously advertising or periodically advertising.

Connection Interval range (for a peripheral):

▪ 7.5 milliseconds to 4000 milliseconds in multiples of 1.25 milliseconds.

For a connection event (for a peripheral device):

▪ The minimum average current consumption is when the connection interval is large 4000 milliseconds

▪ The maximum average current consumption is with the shortest connection interval of 7.5 ms; no slave

latency.

Other factors that are also related to average current consumption include:

▪ Number packets per connection interval with each packet payload size

▪ An inaccurate 32.768 kHz master clock accuracy would increase the average current consumption.

Connection Interval range (for a central device):

▪ 2.5 milliseconds to 40959375 milliseconds in multiples of 1.25 milliseconds.

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The values below are calculated for a typical operating voltage of 3V.

Table 10: UART power consumption

Parameter

Min

Typ

Max

Unit

UART Run current @ 115200 bps

UART Run current @ 1200 bps

Idle current for UART (no activity)

UART Baud rate

1.2

1000

kbps

Table 11: power consumption

Parameter

Min

Typ

Max

Unit

SPI Master Run current @ 2 Mbps

SPI Master Run current @ 8 Mbps

Idle current for SPI (no activity)

SPI bit rate

Mbps

Table 12: I2C power consumption

Parameter

Min

Typ

Max

Unit

I2C Run current @ 100 kbps

I2C Run current @ 400 kbps

I2C Bit rate

100

400

kbps

Table 13: ADC power consumption

Parameter

Min

Typ

Max

Unit

ADC current during conversion

700

The above current consumption is for the given peripheral only and to operate that peripheral requires some other internal

blocks which consume current (base current). This base current is consumed when the UART, SPI, I2C, or ADC is opened

(operated).

For asynchronous interface, like the UART (asynchronous as the other end can communicate at any time), the UART on the

BL654 must be kept open (by a command in smartBASIC application script), resulting in the base current consumption

penalty.

For a synchronous interface like the I2C or SPI (since BL654 side is the master), the interface can be closed and opened (by a

command in smartBASIC application script) only when needed, resulting in current saving (no base current consumption

penalty). There’s a similar argument for ADC (open ADC when needed).

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To provide the widest scope for integration, a variety of physical host interfaces/sensors are provided. The major BL654

series module functional blocks described below.

Power management features:

▪ System Standby Doze and Deep Sleep modes

▪ Open/Close peripherals (UART, SPI, QSPI, I2C, SIO’s, ADC, NFC). Peripherals consume current when open; each

peripheral can be individually closed to save power consumption

▪ Use of the internal DCDC convertor or LDO is decided by the underlying BLE stack

▪ smartBASIC command allows the supply voltage to be read (through the internal ADC)

▪ Pin wake-up system from deep sleep (including from NFC pins)

Power supply features:

▪ Supervisor hardware to manage power during reset, brownout, or power fail.

▪ 1.7V to 3.6V supply range for normal power supply (VDD pin) using internal DCDC convertor or LDO decided by the

underlying BLE stack.

▪ 2.5V to 5.5 supply range for High voltage power supply (VDD_HV pin) using internal DCDC convertor or LDO decided by

the underlying BLE stack.

▪ 4.35V to 5.5V supply range for powering USB (VBUS pin) portion of BL654 only. The remainder of the BL654 module

circuitry must still be powered through the VDD (or VDD_HV) pin.

The BL654 module power supply internally contains the following two main supply regulator stages (Figure 4):

▪ REG0 – Connected to the VDD_HV pin

▪ REG1 – Connected to the VDD pin

The USB power supply is separate (connected to the VBUS pin).

Figure 4: BL654 power supply block diagram (adapted from the following resource:

http://infocenter.nordicsemi.com/pdf/nRF52840_PS_v1.0.pdf

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The BL654 power supply system enters one of two supply voltage modes, normal or high voltage mode, depending on how

the external supply voltage is connected to these pins.

BL654 power supply options:

▪ Option 1 – Normal voltage power supply mode entered when the external supply voltage is connected to both the VDD

and VDD_HV pins (so that VDD equals VDD_HV). Connect external supply within range 1.7V to 3.6V range to BL654 VDD

and VDD_HV pins.

▪ Option 2 – High voltage mode power supply mode (using BL654 VDD_HV pin) entered when the external supply voltage

in ONLY connected to the VDD_HV pin and the VDD pin is not connected to any external voltage supply. Connect

external supply within range 2.5V to 5.5V range to BL654 VDD_HV pin. BL654 VDD pin left unconnected.

Nordic Errata 197 and 202 related to the use of VDD_HV DCDC convertor, for details refer to

http://infocenter.nordicsemi.com/pdf/nRF52840_Rev_1_Errata_v1.1.pdf. Nordic Errata 202 means no external current

draw (from VDD pin) is allowed during power up and VDD_HV rise time (to 3V) is below 1mS.

For either option, if you use USB interface then the BL654 VBUS pin must be connected to external supply within the range

4.35V to 5.5V. When using the BL654 VBUS pin, you MUST externally fit a 4.7uF to ground.

Table 14 summarizes these power supply options.

Table 14: BL654 powering options

Power Supply Pins

and Operating

Voltage Range

OPTION1

Normal voltage

mode operation

connect?

OPTION2

High voltage mode

operation connect?

OPTION1 with USB

peripheral,

operation, and normal

voltage connect?

OPTION2 with USB

peripheral,

operation, and high

voltage connect?

VDD (pin31)

1.7V to 3.6V

Yes

(Note 1)

(Note 2)

Yes

(Note 2)

VDD_HV (pin25)

2.5V to 5.5V

Yes

(Note 5)

VBUS (pin24)

4.35V to 5.5V

(Note 3)

Yes

(Note 4)

Yes

(Note 4)

Power Supply Option Notes:

Note 1

Option 1 – External supply voltage is connected to BOTH the VDD and VDD_HV pins (so that VDD equals

VDD_HV). Connect external supply within range 1.7V to 3.6V range to BOTH BL654 VDD and VDD_HV pins.

Note 2

Option 2 – External supply within range 2.5V to 5.5V range to the BL654 VDD_HV pin ONLY. BL654 VDD pin left

unconnected.

In High voltage mode, the VDD pin becomes an output voltage pin. It can be used to supply external circuitry

from the VDD pin. Before any current can be taken from the BL654 VDD pin, this feature must be enabled in

the BL654. Additionally, the VDD output voltage is configurable from 1.8V to 3.3V with possible settings of

1.8V, 2.1V, 2.4V, 2.7V, 3.0V, and 3.3V. The default voltage is 1.8V.

The supported BL654 VDD pin output voltage range depends on the supply voltage provided on the BL654

VDD_HV pin. The minimum difference between voltage supplied on the VDD_HV pin and the voltage output on

the VDD pin is 0.3 V. The maximum output voltage of the VDD pin is VDDH – 0.3V. Table4 shows the current

that can be drawn by external circuitry from VDD pin in high voltage mode (supply on VDD_HV).

Table 15: Current that can be drawn by external circuitry from VDD pin in High voltage mode (supply on VDD_HV)

Parameter

Min

Typ

Max

Unit

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Power Supply Option Notes:

External current draw (from VDD pin) allowed in High Voltage mode

(supply on VDD_HV) during System OFF (BL654 Deep Sleep)

External current draw (from VDD pin) allowed in High Voltage mode

(supply on VDD_HV) when radio Tx RF power higher than 4dBm.

External current draw (from VDD pin) allowed in High Voltage mode

(supply on VDD_HV) when radio Tx RF power lower than 4dBm.

Minimum difference between voltage supplied on VDD_HV pin and

voltage on VDD pin

0.3

Note 3

External current draw is the sum of all GPIO currents and current being drawn from VDD.

Depends on whether USB operation is required

Note 4

When using the BL654 VBUS pin, you must externally fit a 4.7uF capacitor to ground.

Note 5

To use the BL654 USB peripheral:

1. Connect the BL654 VBUS pin to the external supply within the range 4.35V to 5.5V. When using the

BL654 VBUS pin, you MUST externally fit a 4.7uF to ground.

2. Connect the external supply to either the VDD (Option 1) or VDD_HV (Option 2) pin to operate the rest

of BL654 module.

When using the BL654 USB peripheral, the VBUS pin can be supplied from same source as VDD_HV

(within the operating voltage range of the VBUS pin and VDD_HV pin).

The integrated high accuracy 32 MHz (±10 ppm) crystal oscillator helps with radio operation and reducing power

consumption in the active modes.

The integrated on-chip 32.768 kHz LFRC oscillator (±500 ppm) provides protocol timing and helps with radio power

consumption in the system StandByDoze and Deep Sleep modes by reducing the time that the RX window needs to be open.

To keep the on-chip 32.768 kHz LFRC oscillator within ±500 ppm (which is needed to run the BLE stack) accuracy, RC oscillator

needs to be calibrated (which takes 33 mS) regularly. The default calibration interval is eight seconds which is enough to keep

within ±500 ppm. The calibration interval ranges from 0.25 seconds to 31.75 seconds (in multiples of 0.25 seconds) and

configurable via firmware

When using smartBASIC, the timer subsystem enables applications to be written which allow future events to be generated

based on timeouts.

▪ Regular Timer – There are eight built-in timers (regular timers) derived from a single RTC clock which are controlled

solely by smart BASIC functions. The resolution of the regular timer is 976 microseconds.

▪ Tick Timer – A 31-bit free running counter that increments every (1) millisecond. The resolution of this counter is 488

microseconds.

Refer to the smart BASIC User Guide available from the Laird BL654 product page. For timer utilization when using the Nordic

SDK, refer to http://infocenter.nordicsemi.com/index.jsp.

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Note: Nordic SDK is not supported on the BL654 USB dongle, part #451-00003.

▪ 2402–2480 MHz Bluetooth Low Energy radio BT5.0 – 1 Mbps, 2 Mbps, and Long-range (125 kbps and 500 kbps) over-

the-air data rate.

▪ Tx output power of +8 dBm programmable down to 7dBm, 6dBm, 5dBm, 4dBm, 2dBm, 0dBm and further down to -20

dBm in steps of 4 dB and final TX power level of -40 dBm.

▪ Receiver (with integrated channel filters) to achieve maximum sensitivity -95 dBm @ 1 Mbps BLE, -92 dBm @2 Mbps, -

103 dBm @ 125 kbps long-range and -99 dBm @500kbps long-range).

▪ RF conducted interface available in the following two ways:

– 451-00001: RF connected to on-board PCB trace antenna

– 451-00002: RF connected to on-board IPEX MH4 RF connector

▪ Antenna options:

– Integrated PCB trace antenna on the 451-00001

– External dipole antenna connected with to IPEX MH4 RF connector on the 451-00002

▪ Received Signal Strength Indicator (RSSI)

▪ RSSI accuracy (valid range -90 to -20dBm) is ±2dB typical

▪ RSSI resolution 1dB typical

NFC support:

▪ Based on the NFC forum specification

– 13.56 MHz

– Date rate 106 kbps

– NFC Type2 and Type4 tag emulation

▪ Modes of operation:

– Disable

– Sense

– Activated

▪ Touch-to Pair with NFC

▪ Launch a smartphone app (on Android)

▪ NFC enabled Out-of-Band Pairing

▪ System Wake-On-Field function

– Proximity Detection

Table 16: NFC interface

Signal Name

Pin No

I/O

Comments

NFC1/SIO_09

I/O

The NFC pins are by default NFC pins and an alternate function on each pin

is GPIO. Refer to the smartBASIC. User manual.

NFC2/SIO_10

I/O

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From Nordic’s nRF52840 Objective Product Specification v1.0: http://infocenter.nordicsemi.com/pdf/nRF52840_PS_v1.0.pdf

The NFC antenna coil must be the connected differential between the NFC1 and NFC2 pins of the BL654. Two external

capacitors should be used to tune the resonance of the antenna circuit to 13.56 MHz (Figure 5).

Figure 5: NFC antenna coil tuning capacitors

The required external tuning capacitor value is given by the following equations:

An antenna inductance of Lant = 0.72 uH provides tuning capacitors in the range of 300 pF on each pin. The total capacitance

on NFC1 and NFC2 must be matched. Cint and Cp are small usually (Cint is 4pF), so can omit from calculation.

Battery Protection Note: If the NFC coil antenna is exposed to a strong NFC field, the supply current may flow in the opposite

direction due to parasitic diodes and ESD structures.

If the used battery does not tolerate a return current, a series diode must be placed between the battery and the BL654 to

protect the battery.

Note: The BL654 has two UARTs.

The Universal Asynchronous Receiver/Transmitter (UART) offers fast, full-duplex, asynchronous serial communication with

built-in flow control support (UART_CTS, UART_RTS) in HW up to one Mbps baud. Parity checking and generation for the

ninth data bit are supported.

UART_TX, UART_RX, UART_RTS, and UART_CTS form a conventional asynchronous serial data port with handshaking. The

interface is designed to operate correctly when connected to other UART devices such as the 16550A. The signaling levels are

nominal 0 V and 3.3 V (tracks VDD) and are inverted with respect to the signaling on an RS232 cable.

Two-way hardware flow control is implemented by UART_RTS and UART_CTS. UART_RTS is an output and UART_CTS is an

input. Both are active low.

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These signals operate according to normal industry convention. UART_RX, UART_TX, UART_CTS, UART_RTS are all 3.3 V level

logic (tracks VDD). For example, when RX and TX are idle they sit at 3.3 V. Conversely for handshaking pins CTS, RTS at 0 V is

treated as an assertion.

The module communicates with the customer application using the following signals:

▪ Port/TxD of the application sends data to the module’s UART_RX signal line

▪ Port/RxD of the application receives data from the module’s UART_TX signal line

Figure 6: UART signals

Note: The BL654 serial module output is at 3.3V CMOS logic levels (tracks VDD). Level conversion must be added to

interface with an RS-232 level compliant interface.

Some serial implementations link CTS and RTS to remove the need for handshaking. We do not recommend linking CTS and

RTS other than for testing and prototyping. If these pins are linked and the host sends data at the point that the BL654

deasserts its RTS signal, there is significant risk that internal receive buffers will overflow, which could lead to an internal

processor crash. This will drop the connection and may require a power cycle to reset the module. We recommend that the

correct CTS/RTS handshaking protocol be adhered to for proper operation.

Table 17: UART interface

Signal Name

Pin No

I/O

Comments

SIO_06 / UART_Tx

SIO_06 (alternative function UART_Tx) is an output, set high

(in firmware).

SIO_08 / UART_Rx

SIO_08 (alternative function UART_Rx) is an input, set with internal

pull-up (in firmware).

SIO_05 / UART_RTS

SIO_05 (alternative function UART_RTS) is an output, set low

(in firmware).

SIO_07 / UART_CTS

SIO_07 (alternative function UART_CTS) is an input, set with internal

pull-down (in firmware).

The UART interface is also used to load customer developed smartBASIC application script.

BL654 has USB2.0 FS (Full Speed, 12Mbps) hardware capability. There is a CDC driver/Virtual UART as well as other USB

drivers available via Nordic SDK – such as: usb_audio, usb_hid, usb_generic, usb_msc (mass storage device).

Note: Nordic SDK is not supported on the BL654 USB dongle, part #451-00003.

BL654

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Table 18: USB interface

Signal Name

Pin No

I/O

Comments

D-

I/O

D+

I/O

VBUS

When using the BL654 VBUS pin (which is mandatory when USB interface is used),

Customer MUST connect externally a 4.7uF capacitor to ground.

Note: You MUST power the rest of BL654 module circuitry through the VDD pin

(OPTION1) or VDD_HV pin (OPTION2).

The SPI interface is an alternate function on SIO pins.

The module is a master device that uses terminals SPI_MOSI, SPI_MISO, and SPI_CLK. SPI_CS is implemented using any spare

SIO digital output pins to allow for multi-dropping.

The SPI interface enables full duplex synchronous communication between devices. It supports a 3-wire (SPI_MOSI,

SPI_MISO, SPI_SCK,) bidirectional bus with fast data transfers to and from multiple slaves. Individual chip select signals are

necessary for each of the slave devices attached to a bus, but control of these is left to the application through use of SIO

signals. I/O data is double-buffered.

The SPI peripheral supports SPI mode 0, 1, 2, and 3.

Table 19: SPI interfaces

Signal Name

Pin No

I/O

Comments

SIO_40/SPI_MOSI

This interface is an alternate function configurable by

smartBASIC. Default in the FW pin 56 and 53 are SIO inputs. SPIOPEN()

in smartBASIC selects SPI function and changes pin 56 and 53 to outputs

(when in SPI master mode).

SIO_04/AIN2/SPI_MISO

SIO_41/SPI_CLK

Any_SIO/SPI_CS

SPI_CS is implemented using any spare SIO digital output pins to allow for

multi-dropping. On Laird devboard SIO_44 (pin54) used as SPI_CS.

The I2C interface is an alternate function on SIO pins.

The two-wire interface can interface a bi-directional wired-OR bus with two lines (SCL, SDA) and has master /slave topology.

The interface is capable of clock stretching. Data rates of 100 kbps and 400 kbps are supported.

An I2C interface allows multiple masters and slaves to communicate over a shared wired-OR type bus consisting of two lines

which normally sit at VDD. The SCL is the clock line which is always sourced by the master and SDA is a bi-directional data line

which can be driven by any device on the bus.

IMPORTANT: It is essential to remember that pull-up resistors on both SCL and SDA lines are not provided in the

module and MUST be provided external to the module.

Table 20: I2C interface

Signal Name

Pin No

I/O

Comments

SIO_26/I2C_SDA

I/O

This interface is an alternate function on each pin, configurable by

smartBASIC. I2COPEN() in smartBASIC selects I2C function.

SIO_27/I2C_SCL

I/O

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The 19 SIO pins are configurable by smartBASIC application script or Nordic SDK. They can be accessed individually. Each has

the following user configured features:

▪ Input/output direction

▪ Output drive strength (standard drive 0.5 mA or high drive 5mA)

▪ Internal pull-up and pull-down resistors (13 K typical) or no pull-up/down or input buffer disconnect

▪ Wake-up from high or low-level triggers on all pins including NFC pins

The ADC is an alternate function on SIO pins, configurable by smart BASIC or Nordic SDK.

The BL654 provides access to 8-channel 8/10/12-bit successive approximation ADC in one-shot mode. This enables sampling

up to 8 external signals through a front-end MUX. The ADC has configurable input and reference pre-scaling and sample

resolution (8, 10, and 12 bit).

Table 21: Analog interface

Signal Name

Pin No

I/O

Comments

SIO_05/UART_RTS/AIN3 – Analog Input

This interface is an alternate function on each pin,

configurable by smartBASIC. AIN configuration

selected using GpioSetFunc() function.

Configurable 8, 10, 12-bit resolution.

Configurable voltage scaling 4, 2, 1/1, 1/3, 1/3, 1/4,

1/5, 1/6(default).

Configurable acquisition time 3uS, 5uS, 10uS(default),

15uS, 20uS, 40uS.

Full scale input range (VDD)

SIO_04/AIN2/SPI_MISO – Analog Input

SIO_03/AIN1 – Analog Input

SIO_02/AIN0 – Analog Input

SIO_31/AIN7 – Analog Input

SIO_30/AIN6 – Analog Input

SIO_29/AIN5 – Analog Input

SIO_28/AIN4 – Analog Input

The PWM output is an alternate function on ALL (GPIO) SIO pins, configurable by smartBASIC or the Nordic SDK.

The PWM output signal has a frequency and duty cycle property. Frequency is adjustable (up to 1 MHz) and the duty cycle

can be set over a range from 0% to 100%.

PWM output signal has a frequency and duty cycle property. PWM output is generated using dedicated hardware in the

chipset. There is a trade-off between PWM output frequency and resolution.

For example:

▪ PWM output frequency of 500 kHz (2 uS) results in resolution of 1:2.

▪ PWM output frequency of 100 kHz (10 uS) results in resolution of 1:10.

▪ PWM output frequency of 10 kHz (100 uS) results in resolution of 1:100.

▪ PWM output frequency of 1 kHz (1000 uS) results in resolution of 1:1000.

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The FREQ output is an alternate function on 16 (GPIO) SIO pins, configurable by smartBASIC or Nordic SDK.

Note: The frequency driving each of the 16 SIO pins is the same but the duty cycle can be independently set for each pin.

FREQ output signal frequency can be set over a range of 0Hz to 4 MHz (with 50% mark-space ratio).

Table 22: nRESET pin

Signal Name

Pin No

I/O

Comments

nRESET

BL654 HW reset (active low). Pull the nRESET pin low for minimum 100mS

for the BL654 to reset.

The BL654 Firmware hex file consists of four elements:

▪ smartBASIC runtime engine

▪ Nordic Softdevice

▪ Master Bootloader

Laird BL654 smartBASIC firmware (FW) image part numbers are referenced as w.x.y.z (ex. v29.x.y.z). The BL654 smartBASIC

runtime engine and Softdevice combined image can be upgraded by the customer over the UART interface.

You also have the option to use the two-wire (JTAG) interface, during production, to clone the file system of a Golden

preconfigured BL654 to others using the Flash Cloning process. This is described in the following application note Flash

Cloning for the BL654. In this case the file system is also part of the .hex file.

Signal Name

Pin No

I/O

Comments

SWDIO

I/O

Internal pull-up resistor

SWDCLK

Internal pull-down resistor

The Laird development board incorporates an on-board JTAG J-link programmer for this purpose. There is also the following

JTAG connector which allows on-board JTAG J-link programmer signals to be routed off the development board. The only

requirement is that you should use the following JTAG connector on the host PCB.

The JTAG connector MPN is as follows:

Reference

Part

Description and MPN (Manufacturers Part Number)

JP1

FTSH-105

Header, 1.27mm, SMD, 10-way, FTSH-105-01-L-DV Samtech

Note: Reference on the BL654 development board schematic (Figure 7) shows the DVK development schematic wiring

only for the JTAG connector and the BL654 module JTAG pins.

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Figure 7: BL654 development board schematic

Note: The BL654 development board allows Laird on-board JTAG J-link programmer signals to be routed off the

development board by from connector JP1

JTAG is require because Nordic SDK applications can only be loaded using the JTAG (smartBASIC firmware can be loaded using

JTAG as well as over the UART). We recommend that you use JTAG (2-wire SWD interface) to handle future BL654 module

firmware upgrades. You must wire out the JTAG (2-wire SWD interface) on your host design (see Figure 7, where the

following four lines should be wired out – SWDIO, SWDCLK, GND and VCC). smartBASIC firmware upgrades can still be

performed over the BL654 UART interface, but this is slower than using the BL654 JTAG (2-wire SWD interface) – (60 seconds

using UART vs. 10 seconds when using JTAG).

SWO (SIO_32) is a Trace output (called SWO, Serial Wire Output) and is not necessary for programming BL654 over the SWD

interface.

nRESET_BLE is not necessary for programming BL654 over the SWD interface.

Note: Nordic SDK is not supported on the BL654 USB dongle, part #451-00003.

Wake the BL654 from the host using wake-up pins (any SIO pin). You may configure the BL654’s wakeup pins via smartBASIC

to do any of the following:

▪ Wake up when signal is low

▪ Wake up when signal is high

▪ Wake up when signal changes

Refer to the smartBASIC user guide for details. You can access this guide from the Laird BL654 product page.

For BL654 wake-up using the Nordic SDK, refer to Nordic infocenter.nordicsemi.com.

The BL654 has three power modes: Run, Standby Doze, and Deep Sleep.

The module is placed automatically in Standby Doze if there are no pending events (when WAITEVENT statement is

encountered within a customer’s smartBASIC script). The module wakes from Standby Doze via any interrupt (such as a

received character on the UART Rx line). If the module receives a UART character from either the external UART or the radio,

it wakes up.

Deep sleep is the lowest power mode. Once awakened, the system goes through a system reset.

For different Nordic power modes using the Nordic SDK, refer to Nordic infocenter.nordicsemi.com.

GND

SWDIO_EXT

SWDCLK_EXT

JP1

PIN HEADER,1.27mm 2X5P

1 2

3 4

5 6

7 8

910 nRESET_EXT

SWO_EXT

VDD_VSRC_nRF

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The on-silicon temperature sensor has a temperature range greater than or equal to the operating temperature of the device.

Resolution is 0.25°C degrees. The on-silicon temperature sensor accuracy is ±5°C.

To read temperature from on-silicon temperature sensor (in tenth of centigrade, so 23.4°C is output as 234) using smartBASIC:

▪ In command mode, use ATI2024

▪ From running a smartBASIC application script, use SYSINFO(2024)

Exposed via an API in smartBASIC (see smartBASIC documentation available from the BL654 product page). The rand()

function from a running smartBASIC application returns a value.

For Nordic related functionality, visit Nordic infocenter.nordicsemi.com

Exposed via an API in smartBASIC (see smartBASIC documentation available from the BL654 product page). Function called

aesencrypt and aesdecrypt.

For Nordic related functionality, visit Nordic infocenter.nordicsemi.com

ARM Cryptocell incorporates a true random generator (TRNG) and support for a wide range of asymmetric, symmetric and

hashing cryptographic services for secure applications. For more information, please check the Nordic SDK.

The BL654 supports readback protection capability that disallows the reading of the memory on the nrf52840 using a JTAG

interface. Available via smartBASIC or the Nordic SDK.

The BL654 offers a range of functions for generating public/private keypair, calculating a shared secret, as well as generating

an authenticated hash. Available via smartBASIC or the Nordic SDK.

This is not required for normal BL654 module operation.

The BL654 uses the on-chip 32.76 kHz RC oscillator (LFCLK) by default (which has an accuracy of ±500 ppm) which requires

regulator calibration (every eight seconds) to within ±500 ppm.

You can connect an optional external high accuracy (±20 ppm) 32.768 kHz crystal (and associated load capacitors) to the

BL654SIO_01/XL2 (pin 41) and SIO_00/XL1 (pin 42) to provide improved protocol timing and to help with radio power

consumption in the system standby doze/deep sleep modes by reducing the time that the RX window needs to be open.

Table 23 compares the current consumption difference between RC and crystal oscillator.

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Table 23: Comparing current consumption difference between BL654 on-chip RC 32.76 kHz oscillator and optional external crystal

(32.768kHz) based oscillator

BL654 On-chip 32.768 kHz RC Oscillator

(±500 ppm) LFRC

Optional External Higher Accuracy (±20

ppm) 32.768 kHz Crystal-based Oscillator

LFXO

Current Consumption of

32.768 kHz Block

0.7 uA

0.23 uA

Standby Doze Current

(SYSTEM ON IDLE +full

RAM retention +RTC run

current + LFRC or LFXO)

3.1 uA

2.6 uA

Calibration

Calibration required regularly (default eight

seconds interval).

Calibration takes 33 ms; with DCDC used, the

total charge of a calibration event is 16 uC.

The average current consumed by the

calibration depends on the calibration

interval and can be calculated using the

following formula:

CAL_charge/CAL_interval – The lowest

calibration interval (0.25 seconds) provides an

average current of (DCDC enabled):

16uC/0.25s = 64uA

To get the 500-ppm accuracy, the BLE stack

specification states that a calibration interval

of eight seconds is enough. This gives an

average current of:

16uC/8s = 2 uA

Added to the LFRC run current and Standby

Doze (IDLE) base current shown above results

in a total average current of:

LFRC + CAL = 3.1 + 2 = 5.1 uA

Not applicable

Total

5.1 uA

2.6 uA

Summary

▪ Low current consumption

▪ Accuracy 500 ppm

▪ Lowest current consumption

▪ Needs external crystal

▪ High accuracy (depends on the crystal,

usually 20 ppm)

Table 24: Optional external 32.768 kHz crystal specification

Optional external 32.768kHz crystal

Min

Typ

Max

Crystal Frequency

32.768 kHz

Frequency tolerance requirement of BLE stack

±500 ppm

Load Capacitance

12.5 pF

Shunt Capacitance

2 pF

Equivalent series resistance

100 kOhm

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Optional external 32.768kHz crystal

Min

Typ

Max

Drive level

1 uW

Input capacitance on XL1 and XL2 pads

4 pF

Run current for 32.768 kHz crystal based oscillator

0.23 uA

Start-up time for 32.768 kHz crystal based oscillator

0.25 seconds

Peak to peak amplitude for external low swing clock input signal

must not be outside supply rails

200 mV

1000 mV

Be sure to tune the load capacitors on the board design to optimize frequency accuracy (at room temperature) so it matches

that of the same crystal standalone, Drive Level (so crystal operated within safe limits) and oscillation margin (Rneg is at least 3

to 5 times ESR) over the operating temperature range.

The 451-00001 on-board PCB trace monopole antenna radiated performance depends on the host PCB layout.

The BL654 development board was used for BL654 development and the 451-00001 PCB antenna performance evaluation. To

obtain similar performance, follow guidelines in section PCB Layout on Host PCB for the 451-00001 to allow the on-board PCB

antenna to radiate and reduce proximity effects due to nearby host PCB GND copper or metal covers.

Unit in dBi @2440MHz

XY-plane

XZ-plane

YZ-plane

Peak

Avg

Peak

Avg

Peak

Avg

451-00001 PCB trace antenna

-1.05

-5.13

-1.51

-7.43

-2.49

-5.63

◆XY-plane ◆XZ-plane ◆YZ-plane

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Figure 8: 451-00001 on-board PCB antenna performance (Antenna Gain and S11 – whilst 451-00001 module sitting on Devboard 455-00001)

Note: The BL654-US Dongle User Guide is available in the Documentation section of the Laird BL654 product page –

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Figure 9: 451-00003 USB BLE 5.0 Dongle Mechanical details

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The BL654 is easy to integrate, requiring no external components on your board apart from those which you require for

development and in your end application.

The following are suggestions for your design for the best performance and functionality.

Checklist (for Schematic):

▪ BL654 power supply options:

Option 1 – Normal voltage power supply mode entered when the external supply voltage is connected to both the VDD

and VDDH pins (so that VDD equals VDD_HV). Connect external supply within range 1.7V to 3.6V range to BL654 VDD

and VDD_HV pins.

Option 2 – High voltage mode power supply mode (using BL654 VDD_HV pin) entered when the external supply voltage

in ONLY connected to the VDDH pin and the VDD pin is not connected to any external voltage supply. Connect external

supply within range 2.5V to 5.5V range to BL654 VDD_HV pin. BL654 VDD pin left unconnected.

Nordic Errata 197 and 202 related to the use of VDD_HV DCDC convertor, for details refer to

http://infocenter.nordicsemi.com/pdf/nRF52840_Rev_1_Errata_v1.1.pdf. Nordic Errata 202 means no external current

draw (from VDD pin) is allowed during power up and VDD_HV rise time (to 3V) is below 1mS.

For either option, if you use USB interface then the BL654 VBUS pin must be connected to external supply within the

range 4.35V to 5.5V. When using the BL654 VBUS pin, you MUST externally fit a 4.7uF to ground.

External power source should be within the operating range, rise time and noise/ripple specification of the BL654. Add

decoupling capacitors for filtering the external source. Power-on reset circuitry within BL654 series module incorporates

brown-out detector, thus simplifying your power supply design. Upon application of power, the internal power-on reset

ensures that the module starts correctly.

▪ VDD and coin-cell operation

With a built-in DCDC (operating range 1.7V to 3.6V), that reduces the peak current required from a coin-cell, making it

easier to use with a coin-cell.

▪ AIN (ADC) and SIO pin IO voltage levels

BL654 SIO voltage levels are at VDD. Ensure input voltage levels into SIO pins are at VDD also (if VDD source is a battery

whose voltage will drop). Ensure ADC pin maximum input voltage for damage is not violated.

▪ AIN (ADC) impedance and external voltage divider setup

If you need to measure with ADC a voltage higher than 3.6V, you can connect a high impedance voltage divider to lower

the voltage to the ADC input pin.

▪ JTAG

This is REQUIRED as Nordic SDK applications can only be loaded using the JTAG (smartBASIC firmware can be loaded

using the JTAG as well as the UART).

Laird recommends you use JTAG (2-wire interface) to handle future BL654 module firmware upgrades. You MUST wire

out the JTAG (2-wire interface) on your host design (see Figure 7, where four lines should be wired out, namely SWDIO,

SWDCLK, GND and VCC). Firmware upgrades can still be performed over the BL654 UART interface, but this is slower (60

seconds using UART vs. 10 seconds when using JTAG) than using the BL654 JTAG (2-wire interface).

JTAG may be used if you intend to use Flash Cloning during production to load smartBASIC scripts.

▪ UART

Required for loading your smartBASIC application script during development (or for subsequent firmware upgrades

(except JTAG for FW upgrades and/or Flash Cloning of the smartBASIC application script). Add connector to allow

interfacing with UART via PC (UART–RS232 or UART-USB).

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▪ UART_RX and UART_CTS

SIO_08 (alternative function UART_RX) is an input, set with internal weak pull-up (in firmware). The pull-up prevents the

module from going into deep sleep when UART_RX line is idling.

SIO_07 (alternative function UART_CTS) is an input, set with internal weak pull-down (in firmware). This pull-down

ensures the default state of the UART_CTS will be asserted which means can send data out of the UART_TX line. Laird

recommends that UART_CTS be connected.

▪ nAutoRUN pin and operating mode selection

nAutoRUN pin needs to be externally held high or low to select between the two BL654 operating modes at power-up:

– Self-contained Run mode (nAutoRUN pin held at 0V).

– Interactive / development mode (nAutoRUN pin held at VDD).

Make provision to allow operation in the required mode. Add jumper to allow nAutoRUN pin to be held high or

low (BL654 has internal 13K pull-down by default) OR driven by host GPIO.

▪ I2C

It is essential to remember that pull-up resistors on both I2C_SCL and I2C_SDA lines are not provided in the BL654

module and MUST be provided external to the module as per I2C standard.

▪ SPI

Implement SPI chip select using any unused SIO pin within your smartBASIC application script or Nordic application then

SPI_CS is controlled from the software application allowing multi-dropping.

▪ SIO pin direction

BL654 modules shipped from production with smart BASIC FW, all SIO pins (with default function of DIO) are mostly

digital inputs (see Pin Definitions Table2). Remember to change the direction SIO pin (in your smartBASIC application

script) if that particular pin is wired to a device that expects to be driven by the BL654 SIO pin configured as an output.

Also, these SIO pins have the internal pull-up or pull-down resistor-enabled by default in firmware (see Pin Definitions

Table 2). This was done to avoid floating inputs, which can cause current consumption in low power modes (e.g.

StandbyDoze) to drift with time. You can disable the PULL-UP or Pull-down through their smartBASIC application.

Note: Internal pull-up, pull down will take current from VDD.

▪ SIO_02 pin and OTA smartBASIC application download feature

SIO_02 is an input, set with internal pull-down (in FW). Refer to latest firmware release documentation on how SIO_02

is used for Over the Air smartBASIC application download feature. The SIO_02 pin must be pulled high externally to

enable the feature. Decide if this feature is required in production. When SIO_02 is high, ensure nAutoRun is NOT high

at same time; otherwise you cannot load the smartBASIC application script.

• NFC antenna connector

To make use of the Laird flexi-PCB NFC antenna, fit connector:

– Description – FFC/FPC Connector, Right Angle, SMD/90d, Dual Contact,1.2 mm Mated Height

– Manufacturer – Molex

– Manufacturers Part number – 512810594

Add tuning capacitors of 300 pF on NFC1 pin to GND and 300 pF on NFC2 pins to GND if the PCB track length is similar as

development board.

▪ nRESET pin (active low)

Hardware reset. Wire out to push button or drive by host.

By default module is out of reset when power applied to VCC pins.

▪ Optional External 32.768kHz crystal

If the optional external 32.768kHz crystal is needed then use a crystal that meets specification and add load capacitors

whose values should be tuned to meet all specification for frequency and oscillation margin.

▪ SIO_38 special function pin

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This is for future use by Laird. It is currently a Do Not Connect pin if using the smartBASIC FW.

Checklist (for PCB):

▪ MUST locate BL654 module close to the edge of PCB (mandatory for the 451-00001 for on-board PCB trace antenna to

radiate properly).

▪ Use solid GND plane on inner layer (for best EMC and RF performance).

▪ All module GND pins MUST be connected to host PCB GND.

▪ Place GND vias close to module GND pads as possible.

▪ Unused PCB area on surface layer can flooded with copper but place GND vias regularly to connect the copper flood to

the inner GND plane. If GND flood copper is on the bottom of the module, then connect it with GND vias to the inner

GND plane.

▪ Route traces to avoid noise being picked up on VDD, VDDH, VBUS supply and AIN (analogue) and SIO (digital) traces.

▪ Ensure no exposed copper is on the underside of the module (refer to land pattern of BL654 development board).

The 451-00001 has an integrated PCB trace antenna and its performance is sensitive to host PCB. It is critical to locate the

451-00001 on the edge of the host PCB (or corner) to allow the antenna to radiate properly. Refer to guidelines in section

PCB land pattern and antenna keep-out area for the 451-00001. Some of those guidelines repeated below.

▪ Ensure there is no copper in the antenna keep-out area on any layers of the host PCB. Keep all mounting hardware and

metal clear of the area to allow proper antenna radiation.

▪ For best antenna performance, place the 451-00001 module on the edge of the host PCB, preferably in the edge center.

▪ The BL654 development board has the 451-00001 module on the edge of the board (not in the corner). The antenna

keep-out area is defined by the BL654 development board which was used for module development and antenna

performance evaluation is shown in Figure 10, where the antenna keep-out area is ~5 mm wide, ~39.95 mm long; with

PCB dielectric (no copper) height ~1 mm sitting under the 451-00001 PCB trace antenna.

▪ The 451-00001 PCB trace antenna is tuned when the 451-00001 is sitting on development board (host PCB) with size of

125 mm x 85 mm x 1mm.

▪ A different host PCB thickness dielectric will have small effect on antenna.

▪ The antenna-keep-out defined in the Host PCB Land Pattern and Antenna Keep-out for the 451-00001 section.

▪ Host PCB land pattern and antenna keep-out for the BL654 applies when the 451-00001 is placed in the edge of the host

PCB preferably in the edge center. Figure 10 shows an example.

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Figure 10: PCB trace Antenna keep-out area (shown in red), corner of the BL654 development board for the 451-00001 module.

Antenna Keep-out Notes:

Note 1

The BL654 module is placed on the edge, preferably edge centre of the host PCB.

Note 2

Copper cut-away on all layers in the Antenna Keep-out area under the 451-00001 on host PCB.

Checklist (for metal /plastic enclosure):

▪ Minimum safe distance for metals without seriously compromising the antenna (tuning) is 40 mm top/bottom and 30

mm left or right.

▪ Metal close to the 451-00001 PCB trace monopole antenna (bottom, top, left, right, any direction) will have degradation

on the antenna performance. The amount of that degradation is entirely system dependent, meaning you will need to

perform some testing with your host application.

▪ Any metal closer than 20 mm will begin to significantly degrade performance (S11, gain, radiation efficiency).

▪ It is best that you test the range with a mock-up (or actual prototype) of the product to assess effects of enclosure

height (and materials, whether metal or plastic).

Antenna Keep-out

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Please refer to the regulatory sections for FCC, IC, CE, and Japan for details of use of BL654-with external antennas in each

regulatory region.

The BL654 family has been designed to operate with the below external antennas (with a maximum gain of

2.0 dBi). The required antenna impedance is 50 ohms. See Table 25. External antennas improve radiation efficiency.

Table 25: External antennas for the BL654

Manufacturer

Model

Laird

Part Number

Type

Connector

Peak Gain

2400-2500 MHz

2400-2480 MHz

Laird

NanoBlue

EBL2400A1-10MH4L

PCB Dipole

IPEX MHF4

2 dBi

Laird

FlexPIFA

001-0022

Patch

IPEX MHF4

2 dBi

Laird

FlexNotch

001-0023

Notch

IPEX MHF4

2 dBi

Mag.Layers

EDA-8709-2G4C1-B27-CY

0600-00057

Dipole

IPEX MHF4

2 dBi

Laird

mFlexPIFA

EFA2400A3S-10MH4L

PIFA

IPEX MHF4

2 dBi

Laird

Laird NFC

0600-00061

NFC

N/A

Laird

BL654 PCB printed antenna

Printed PCB

N/A

0 dBi

Walsin

RFDPA870900SBAB8G1

Dipole

SMA

2dBi

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Figure 11: BL654 mechanical drawings

Development Kit Schematics can be found in the software downloads tab of the BL654 product page –

https://www.lairdtech.com/products/bl654-ble-thread-nfc-modules

Rear View

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Figure 12: Land pattern and Keep-out for the 451-00001

All dimensions are in mm.

Host PCB Land Pattern and Antenna Keep-out for the 451-00001 Notes:

Note 1

Ensure there is no copper in the antenna ‘keep out area’ on any layers of the host PCB. Also keep all mounting

hardware or any metal clear of the area (Refer to 6.3.2) to reduce effects of proximity detuning the antenna

and to help antenna radiate properly.

Note 2

For the best on-board antenna performance, the module 451-00001 MUST be placed on the edge of the host

PCB and preferably in the edge centre and host PCB, the antenna “Keep Out Area” is extended (see Note 4).

Note 3

BL654 development board has the 451-00001 placed on the edge of the PCB board (and not in corner) for that

the Antenna keep out area is extended down to the corner of the development board, see section PCB Layout

on Host PCB for the 451-00001, Figure 12. This was used for module development and antenna performance

evaluation.

Note 4

Ensure that there is no exposed copper under the module on the host PCB.

Note 5

You may modify the PCB land pattern dimensions based on their experience and/or process capability.

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Laird Technologies surface mount modules are designed to conform to all major manufacturing guidelines. This application

note is intended to provide additional guidance beyond the information that is presented in the User Manual. This

Application Note is considered a living document and will be updated as new information is presented.

The modules are designed to meet the needs of several commercial and industrial applications. They are easy to manufacture

and conform to current automated manufacturing processes.

Figure 13: Reel specifications

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Figure 14: Tape specifications

There are 1,000 x BL654 modules taped in a reel (and packaged in a pizza box) and five boxes per carton (5000 modules per

carton). Reel, boxes, and carton are labeled with the appropriate labels. See Carton Contents for more information.

The following are the contents of the carton shipped for the BL654 modules.

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Figure 16: BL654 packaging process

The following labels are located on the antistatic bag:

Figure 17: Antistatic bag labels

Figure 15: Carton contents for the BL654

M/N:451-00001

QTY:1000PCS

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The following package label is located on both sides of the master carton:

Figure 18: Master carton package label

The following is the packing slip label:

Figure 19: Packing slip label

Prior to any reflow, it is important to ensure the modules were packaged to prevent moisture absorption. New packages

contain desiccate (to absorb moisture) and a humidity indicator card to display the level maintained during storage and

shipment. If directed to bake units on the card, see Table 26 and follow instructions specified by IPC/JEDEC J-STD-033. A copy

of this standard is available from the JEDEC website: http://www.jedec.org/sites/default/files/docs/jstd033b01.pdf

Any modules not manufactured before exceeding their floor life should be re-packaged with fresh desiccate and a new

humidity indicator card. Floor life for MSL (Moisture Sensitivity Level) 4 devices is 168 hours in ambient environment

30°C/60%RH.

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Table 26: Recommended baking times and temperatures

MSL

125°C

Baking Temp.

90°C/≤ 5%RH

Baking Temp.

40°C/ ≤ 5%RH

Baking Temp.

Saturated

30°C/85%

Floor Life Limit

+ 72 hours

@ 30°C/60%

Saturated

30°C/85%

Floor Life Limit

+ 72 hours

@ 30°C/60%

Saturated

@ 30°C/85%

Floor Life Limit

+ 72 hours @

30°C/60%

9 hours

7 hours

33 hours

23 hours

13 days

9 days

Laird surface mount modules are designed to be easily manufactured, including reflow soldering to a PCB. Ultimately it is the

responsibility of the customer to choose the appropriate solder paste and to ensure oven temperatures during reflow meet

the requirements of the solder paste. Laird surface mount modules conform to J-STD-020D1 standards for reflow

temperatures.

Important: During reflow, modules should not be above 260° and not for more than 30 seconds. In addition, we

recommend that the BL654 module does not go through the reflow process more than one time; otherwise

the BL654 internal component soldering may be impacted.

Figure 20: Recommended reflow temperature

Temperatures should not exceed the minimums or maximums presented in Table 27.

Table 27: Recommended maximum and minimum temperatures

Specification

Value

Unit

Temperature Inc./Dec. Rate (max)

1~3

°C / Sec

Temperature Decrease rate (goal)

2-4

°C / Sec

Soak Temp Increase rate (goal)

.5 - 1

°C / Sec

Flux Soak Period (Min)

Sec

Flux Soak Period (Max)

120

Sec

Flux Soak Temp (Min)

150

°C

Flux Soak Temp (max)

190

°C

Time Above Liquidous (max)

Sec

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Specification

Value

Unit

Time Above Liquidous (min)

Sec

Time In Target Reflow Range (goal)

Sec

Time At Absolute Peak (max)

Sec

Liquidous Temperature (SAC305)

218

°C

Lower Target Reflow Temperature

240

°C

Upper Target Reflow Temperature

250

°C

Absolute Peak Temperature

260

°C

Model

US/FCC

Canada/IC

451-00001

SQGBL654

3147A-BL654

451-00002

SQGBL654

3147A-BL654

The 451-00001 and the 451-00002 hold full modular approvals. The OEM must follow the regulatory guidelines and warnings

listed below to inherit the modular approval.

Part #

Form Factor

Tx Outputs

Antenna

451-00001

Surface Mount

8 dBm

PCB Trace

451-00002

Surface Mount

8 dBm

IPEX MHF4

The BL654 family has been designed to operate with the antennas listed below with a maximum gain of 2 dBi. The required

antenna impedance is 50 ohms.

Manufacturer

Model

Laird

Part Number

Type

Connector

Peak Gain

2400-2500 MHz

2400-2480 MHz

Laird

NanoBlue

EBL2400A1-10MH4L

PCB Dipole

IPEX MHF4

2 dBi

Laird

FlexPIFA

001-0022

PCB Dipole

IPEX MHF4

2 dBi

Laird

FlexNotch

001-0023

PCB Dipole

IPEX MHF4

2 dBI

Mag.Layers

EDA-8709-2G4C1-B27-CY

0600-00057

Dipole

IPEX MHF4

2 dBi

Laird

mFlexPIFA

EFA2400A3S-10MH4L

PIFA

IPEX MHF4

2 dBI

Laird

Laird NFC

0600-00061

NFC

N/A

Laird

BL654 PCB printed antenna

Printed PCB

N/A

0 dBi

Walsin

RFDPA870900SBAB8G1

Dipole

SMA

2dBi

Note: The OEM is free to choose another vendor’s antenna of like type and equal or lesser gain as an antenna appearing

in the table and still maintain compliance. Reference FCC Part 15.204(c)(4) for further information on this topic.

To reduce potential radio interference to other users, the antenna type and gain should be chosen so that the

equivalent isotropic radiated power (EIRP) is not more than that permitted for successful communication.

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Federal Communication Commission (FCC) Radiation Exposure Statement:

This EUT complies with SAR for general population/uncontrolled exposure limits in FCC Part 1.1307, Part. 1310 and FCC KDB

447498 – RF Exposure Procedures and Equipment Authorization Policies for Mobile and Portable Devices.

This transceiver must not be co-located or operating in conjunction with any other antenna, transmitter, or external

amplifiers. Further testing/evaluation of the end product will be required if the OEM’s device violates any of these

requirements.

The BL654 is fully approved for mobile and portable applications.

WARNING: The OEM must ensure that FCC labelling requirements are met. This includes a clearly visible label on the

outside of the OEM enclosure specifying the appropriate Laird Technology FCC identifier for this product.

Contains FCC ID: SQGBL654

If the size of the end product is larger than 8x10cm, then the following FCC part 15.19 statement must also

be available on visible on outside of device:

The enclosed device complies with Part 15 of the FCC Rules. Operation is subject to the following two

conditions: (1) This device may not cause harmful interference, and (2) This device must accept any

interference received, including interference that may cause undesired operation

Label and text information should be in a size of type large enough to be readily legible, consistent with the dimensions of the

equipment and the label. However, the type size for the text is not required to be larger than eight points.

CAUTION: The OEM should have their device which incorporates the BL654 tested by a qualified test house to verify

compliance with FCC Part 15 Subpart B limits for unintentional radiators.

CAUTION: Any changes or modifications not expressly approved by Laird Technology could void the user’s authority to

operate the equipment.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the

FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential

installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in

accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee

that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or

television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct

the interference by one of the following measures:

▪ Reorient or relocate the receiving antenna.

▪ Increase the separation between the equipment and receiver.

▪ Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

▪ Consult the dealer or an experienced radio/TV technician for help.

FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the

user's authority to operate this equipment.

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This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may

not cause harmful interference, and (2) this device must accept any interference received, including interference that may

cause undesired operation.

IMPORTANT NOTE:

FCC Radiation Exposure Statement:

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. Both the module and

dongle meet the SAR exclusion requirements at the minimum separation distance of 5mm. As a result, there is no minimum

separation distance restriction for the FCC requirements.

This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter without further

evaluation to the requirements in FCC KDB 447498- RF Exposure Procedures and Equipment Authorization Policies for

Mobile and Portable Devices.

Country Code selection feature to be disabled for products marketed to the US/CANADA.

This device is intended only for OEM integrators under the following conditions:

1. The transmitter module may not be co-located with any other transmitter or antenna without further evaluation to

the RF exposure requirements as outlined in FCC KDB 447498.

2. For all products market in US, OEM has to limit the operation channels in CH1 to CH11 for 2.4G band by supplied

firmware programming tool. OEM shall not supply any tool or info to the end-user regarding to Regulatory Domain

change.

As long as these three conditions above are met, further transmitter test will not be required. However, the OEM integrator is

still responsible for testing their end-product for any additional compliance requirements required with this module installed

IMPORTANT NOTE

If these conditions cannot be met (for example certain laptop configurations or co-location with another transmitter), then

the FCC authorization is no longer considered valid and the FCC ID cannot be used on the final product without further

review. In these circumstances, the OEM integrator is responsible for re-evaluating the end product (including the

transmitter) and obtaining a separate FCC authorization if the FCC ID cannot be used.

End Product Labeling

The final end product must be labeled in a visible area with the following: Contains FCC ID: SQGBL654.

Manual Information to the End User

The OEM integrator must be aware not to provide information to the end user regarding how to install or remove this RF

module in the user’s manual of the end product which integrates this module.

The end user manual shall include all required regulatory information/warning as show in this manual.

This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic

Development Canada’s licence-exempt RSS(s). Operation is subject to the following two conditions:

(1) This device may not cause interference; and

(2) This device must accept any interference, including interference that may cause undesired operation of the device.

Cet appareil contient des émetteurs / récepteurs exempts de licence qui sont conformes au (x) RSS (s) exemptés de licence

d'Innovation, Sciences et Développement économique Canada. L'opération est soumise aux deux conditions suivantes:

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(1) Cet appareil ne doit pas causer d'interférences

(2) Cet appareil doit accepter toute interférence, y compris les interférences pouvant provoquer un fonctionnement

indésirable de l'appareil.

This radio transmitter (IC: 3147A-BL654) has been approved by Industry Canada to operate with the antenna types listed

below with the maximum permissible gain indicated. Antenna types not included in this list, having a gain greater than the

maximum gain indicated for that type, are strictly prohibited for use with this device.

Le présent émetteur radio (IC: 3147A-BL654) a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne

énumérés ci-dessous et ayant un gain admissible maximal. Les types d'antenne non inclus dans cette liste, et dont le gain est

supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de l'émetteur.

Manufacturer

Model

Type

2400-2500 MHz

2400-2480 MHz

Laird

NanoBlue

PCB Dipole

2dBi

Laird

FlexPIFA

PCB Dipole

2dBi

Laird

FlexNotch

PCB Dipole

2dBI

Mag.Layers

EDA-8709-2G4C1-B27-CY

Dipole

2dBi

Laird

mFlexPIFA

PIFA

2dBI

Laird

Laird NFC

NFC

Laird

BL654 PCB printed antenna

Printed PCB

0dBi

Walsin

RFDPA870900SBAB8G1

Dipole

2dBi

Radiation Exposure Statement:

This equipment complies with Canada radiation exposure limits set forth for an uncontrolled environment. The module meets

the SAR exclusion limit when installed and operated with a minimum distance of 12mm between the radiator & your body.

The USB Dongle was evaluated for SAR with a measured value of 0.05W/kg and as a result was found to be compliant at the

5 mm separation distance for 1 g SAR (W/kg).

Déclaration d'exposition aux radiations:

Cet équipement est conforme aux limites d'exposition aux rayonnements définies par le Canada pour un environnement

non contrôlé. Le module respecte la limite d'exclusion SAR lorsqu'il est installé et utilisé avec une distance minimale de 12

mm entre le radiateur et votre corps. La clé USB a été évaluée pour le DAS avec une valeur mesurée de 0,05 W / kg et a donc

été jugée conforme à la Distance de séparation de 5 mm pour 1 g de SAR (W / kg).

This device is intended only for OEM integrators under the following conditions:

1. The transmitter module may not be co-located with any other transmitter or antenna without further evaluation to

the RF exposure requirements in IEEE 1528 or FCC KDB 447498.

As long as the condition above is met, further transmitter test will not be required. However, the OEM integrator is still

responsible for testing their end-product for any additional compliance requirements required with this module installed.

Cet appareil est conçu uniquement pour les intégrateurs OEM dans les conditions suivantes:

1. Le module émetteur peut ne pas être coïmplanté avec un autre émetteur ou antenne sans autre évaluation des

exigences en matière d'exposition RF dans IEEE 1528 ou FCC KDB 447498.

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Tant que les 1 condition ci-dessus sont remplies, des essais supplémentaires sur l'émetteur ne seront pas nécessaires.

Toutefois, l'intégrateur OEM est toujours responsable des essais sur son produit final pour toutes exigences de conformité

supplémentaires requis pour ce module installé.

IMPORTANT NOTE:

In the event that these conditions can not be met (for example certain laptop configurations or co-location with another

transmitter), then the Canada authorization is no longer considered valid and the IC ID can not be used on the final product.

In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter)

and obtaining a separate Canada authorization.

NOTE IMPORTANTE:

Dans le cas où ces conditions ne peuvent être satisfaites (par exemple pour certaines configurations d'ordinateur portable ou

de certaines co-localisation avec un autre émetteur), l'autorisation du Canada n'est plus considéré comme valide et l'ID IC ne

peut pas être utilisé sur le produit final. Dans ces circonstances, l'intégrateur OEM sera chargé de réévaluer le produit final (y

compris l'émetteur) et l'obtention d'une autorisation distincte au Canada.

End Product Labeling

The final end product must be labeled in a visible area with the following: Contains IC: 3147A-BL654.

Plaque signalétique du produit final

Le produit final doit être étiqueté dans un endroit visible avec l'inscription suivante: Contains IC: 3147A-BL654.

Manual Information to the End User

The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF

module in the user’s manual of the end product which integrates this module.

The end user manual shall include all required regulatory information/warning as show in this manual.

Manuel d'information à l'utilisateur final

L'intégrateur OEM doit être conscient de ne pas fournir des informations à l'utilisateur final quant à la façon d'installer ou de

supprimer ce module RF dans le manuel de l'utilisateur du produit final qui intègre ce module.

Le manuel de l'utilisateur final doit inclure toutes les informations réglementaires requises et avertissements comme indiqué

dans ce manuel.

The BL654 is approved for use in the Japanese market. The part numbers listed below hold WW type certification. Refer to

ARIB-STD-T66 for further guidance on OEM’s responsibilities.

Model

Certificate Number

Antenna

451-00001

201-180112

PCB Trace

451-00002

201-180112

IPEX MHF4

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The BL654 was tested with antennas listed below. The OEM can choose a different manufacturers antenna but must make

sure it is of same type and that the gain is lesser than or equal to the antenna that is approved for use.

Manufacturer

Model

Laird

Part Number

Type

Connector

Peak Gain

2400-2500 MHz

2400-2480 MHz

Laird

NanoBlue

EBL2400A1-10MH4L

PCB Dipole

IPEX MHF4

2 dBi

Laird

FlexPIFA

001-0022

PCB Dipole

IPEX MHF4

2 dBi

Laird

FlexNotch

001-0023

PCB Dipole

IPEX MHF4

2 dBI

Mag.Layers

EDA-8709-2G4C1-B27-CY

0600-00057

Dipole

IPEX MHF4

2 dBi

Laird

mFlexPIFA

EFA2400A3S-10MH4L

PIFA

IPEX MHF4

2 dBI

Laird

Laird NFC

0600-00061

NFC

N/A

Laird

BL654 PCB printed antenna

Printed PCB

N/A

0 dBi

Walsin

RFDPA870900SBAB8G1

Dipole

SMA

2dBi

The 451-00001/451-00002 have been tested for compliance with relevant standards for the EU market. The 451-00002

module was tested with a 2 dBi antenna. The OEM can operate the 451-00002 module with any other type of antenna but

must ensure that the gain does not exceed 2 dBi to maintain the Laird approval.

The OEM should consult with a qualified test house before entering their device into an EU member country to make sure all

regulatory requirements have been met for their complete device.

Reference the Declaration of Conformities listed below for a full list of the standards that the modules were tested to. Test

reports are available upon request.

The antennas listed below were tested for use with the BL654. For CE mark countries, the OEM is free to use any

manufacturer’s antenna and type of antenna if the gain is less than or equal to the highest gain approved for use (2dBi)

Contact a Laird representative for more information regarding adding antennas.

Manufacturer

Model

Laird

Part Number

Type

Connector

Peak Gain

2400-2500 MHz

2400-2480 MHz

Laird

NanoBlue

EBL2400A1-10MH4L

PCB Dipole

IPEX MHF4

2 dBi

Laird

FlexPIFA

001-0022

PCB Dipole

IPEX MHF4

2 dBi

Laird

FlexNotch

001-0023

PCB Dipole

IPEX MHF4

2 dBI

Mag.Layers

EDA-8709-2G4C1-B27-CY

0600-00057

Dipole

IPEX MHF4

2 dBi

Laird

mFlexPIFA

EFA2400A3S-10MH4L

PIFA

IPEX MHF4

2 dBI

Laird

Laird NFC

0600-00061

NFC

N/A

Laird

BL654 PCB printed antenna

Printed PCB

N/A

0 dBi

Walsin

RFDPA870900SBAB8G1

Dipole

SMA

2dBi

https://connectivity.lairdtech.com/wireless-

modules/bluetooth-modules

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Note: The BL654 module internal BLE chipset IC pins are rated 2 kV (ESD HBM). ESD can find its way through the external

JTAG connector (if used on the customer’s design), if discharge is applied directly. Customer should ensure

adequate protection against ESD on their end product design (using the BL654 module) to meet relevant ESD

standard (for CE, this is EN301-489).

https://connectivity.lairdtech.com/wireless-

modules/bluetooth-modules

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Manufacturer

Laird

Products

451-00001, 451-00002

Product Description

Bluetooth v5.0 + 802.15.4 + NFC

EU Directives

2014/53/EU – Radio Equipment Directive (RED)

Reference standards used for presumption of conformity:

Article Number

Requirement

Reference standard(s)

3.1a

Low voltage equipment safety

EN 60950-1:2006 +A11:2009 +A1:2010 +A12:2011 +A2:2013

RF Exposure

EN 62311:2008

EN 50385:2017

3.1b

Protection requirements –

Electromagnetic compatibility

EN 301 489-1 v2.2.0 (2017-03) (Draft)

EN 301 489-3 v2.1.1 (Draft)

EN 301 489-17 v3.2.0 (2017-03) (Draft)

3.2

Means of the efficient use of the

radio frequency spectrum (ERM)

EN 300 328 v2.1.1 (2016-11)

Wide-band transmission systems

EN 300 330 v2.1.1 (2017-02)

Short Range Devices (SRD)

Declaration:

We, Laird, declare under our sole responsibility that the essential radio test suites have been carried out and that the above

product to which this declaration relates is in conformity with all the applicable essential requirements of Article 3 of the EU

Radio Equipment Directive 2014/53/EU, when used for its intended purpose.

The minimum distance between the user and/or any bystander and the radiating structure of the transmitter is 20 cm.

Place of Issue:

Laird

W66N220 Commerce Court, Cedarburg, WI 53012 USA

tel: +1-262-375-4400 fax: +1-262-364-2649

Date of Issue:

25 June 2018

Name of Authorized Person:

Thomas T Smith, Staff Engineer

Signature of Authorized Person:

https://connectivity.lairdtech.com/wireless-

modules/bluetooth-modules

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Part Number

Product Description

451-00001

Bluetooth v5/802.15.4/NFC module – Integrated antenna

451-00002

Bluetooth v5 / 802.15.4 / NFC module – External antenna

451-00003

Intelligent USB Bluetooth v5 adapter

455-00001

Development Kit for 451-00001 module – Integrated antenna

455-00002

Development Kit for the 451-00002 module – External antenna

451-00001C

Bluetooth v5/802.15.4/NFC module – Integrated antenna – Cut/Tape

451-00002C

Bluetooth v5 / 802.15.4 / NFC module – External antenna – Cut/Tape

The BL654 module is listed on the Bluetooth SIG website as a qualified End Product.

Design

Name

Owner

Declaration ID

QD ID

Link to listing on the SIG website

BL654

Laird

Technologies

D040166

114304

https://launchstudio.bluetooth.com/ListingDetails/63185

BL654

Laird

Technologies

D041400

117615

https://launchstudio.bluetooth.com/ListingDetails/67595

It is a mandatory requirement of the Bluetooth Special Interest Group (SIG) that every product implementing Bluetooth

technology has a Declaration ID. Every Bluetooth design is required to go through the qualification process, even when

referencing a Bluetooth Design that already has its own Declaration ID. The Qualification Process requires each company to

registered as a member of the Bluetooth SIG – www.bluetooth.org

The following link provides a link to the Bluetooth Registration page: https://www.bluetooth.org/login/register/

For each Bluetooth Design, it is necessary to purchase a Declaration ID. This can be done before starting the new

qualification, either through invoicing or credit card payment. The fees for the Declaration ID will depend on your

membership status, please refer to the following webpage:

https://www.bluetooth.org/en-us/test-qualification/qualification-overview/fees

For a detailed procedure of how to obtain a new Declaration ID for your design, please refer to the following SIG document:

https://www.bluetooth.org/DocMan/handlers/DownloadDoc.ashx?doc_id=283698&vId=317486

To start a listing, go to: https://www.bluetooth.org/tpg/QLI_SDoc.cfm

In step 1, select the option, Reference a Qualified Design and enter D040166 or D041400 in the End Product table entry. You

can then select your pre-paid Declaration ID from the drop-down menu or go to the Purchase Declaration ID page, (please

note that unless the Declaration ID is pre-paid or purchased with a credit card, it will not be possible to proceed until the SIG

invoice is paid.

https://connectivity.lairdtech.com/wireless-

modules/bluetooth-modules

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Once all the relevant sections of step 1 are finished, complete steps 2, 3, and 4 as described in the help document. Your new

Design will be listed on the SIG website and you can print your Certificate and Declaration of Conformity.

For further information, please refer to the following training material:

https://www.bluetooth.org/en-us/test-qualification/qualification-overview/listing-process-updates

Note: If using the BL654 with Laird Firmware and smartBASIC script, you can skip “Controller Subsystem”, “Host

Subsystem”, and “Profile Subsystem”.

If you wish to deviate from the standard End Product design listed under D040166 or D041400, the qualification process

follows the Traditional Project route, creating a new design. When creating a new design, it is necessary to complete the full

qualification listing process and also maintain a compliance folder for the new design.

The BL654 design under D040166 incorporates the following components:

Listing reference

Design Name

Core Spec Version

D038622

S140 Host v6.0.0

5.0

D038623

S140 Link layer v6.0.0

5.0

The BL654 design under D041400 incorporates the following components:

Listing reference

Design Name

Core Spec Version

D039780

S140 Host v6.1.0

5.0

D040756

S140 Link layer v6.1.0x

5.0

In the future, Nordic may list updated versions of these components and it is possible to use them in your new design. Please

check with Nordic to make sure these software components are compatible with the nRF52 hardware XXXXX

If your design is based on un-modified BL654 hardware it is possible use the following process;

1. Reference the existing RF-PHY test report from the BL654 listing.

2. Combine the relevant Nordic Link Layer (LL) – check QDID with Nordic.

3. Combine in a Host Component (covering L2CAP, GAP, ATT, GATT, SM) - check QDID with Nordic.

4. Test any standard SIG profiles that are supported in the design (customs profiles are exempt).

https://connectivity.lairdtech.com/wireless-

modules/bluetooth-modules

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Figure 21: Scope of the qualification for an End Product Design

The first step is to generate a project on the TPG (Test Plan Generator) system. This determines which test cases apply to

demonstrate compliance with the Bluetooth Test Specifications. If you are combining pre-tested and qualified components in

your design and they are within their three-year listing period, you are not required to re-test those layers covered by these

components.

If the design incorporates any standard SIG LE profiles (such as Heart Rate Profile), it is necessary to test these profiles using

PTS or other tools where permitted; the results are added to the compliance folder.

You are required to upload your test declaration and test reports (where applicable) and then complete the final listing steps

on the SIG website. Remember to purchase your Declaration ID before you start the qualification process, as it’s impossible to

complete the listing without it.

End

Product

Laird RF-PHY

Nordic LL

Host

Layers

Profiles

https://connectivity.lairdtech.com/wireless-

modules/bluetooth-modules

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Please contact your local sales representative or our support team for further assistance:

Laird Technologies Connectivity Products Business Unit

Support Centre: http://ews-support.lairdtech.com

Email: wireless.support@lairdtech.com

Phone: Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Web: www.lairdtech.com/products

Note: This is a first production release version of the BL654 datasheet.

Information contained in this document is subject to change.

specifications are subject to change without notice. Responsibility for the use and application of Laird materials or products rests with the end user since

Laird and its agents cannot be aware of all potential uses. Laird makes no warranties as to non-infringement nor as to the fitness, merchantability, or

sustainability of any Laird materials or products for any specific or general uses. Laird, Laird Technologies, Inc., or any of its affiliates or agents shall not be

liable for incidental or consequential damages of any kind. All Laird products are sold pursuant to the Laird Terms and Conditions of Sale in effect from time

to time, a copy of which will be furnished upon request. When used as a tradename herein, Laird means Laird PLC or one or more subsidiaries of Laird PLC.

Laird™, Laird Technologies™, corresponding logos, and other marks are trademarks or registered trademarks of Laird. Other marks may be the property of

third parties. Nothing herein provides a license under any Laird or any third party intellectual property right.