2016 Microchip Technology Inc. DS50002480A
MCP2221
I2C Demonstration Board
User’s Guide
DS50002480A-page 2 2016 Microchip Technology Inc.
Information contained in this publication regarding device
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• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
• Microchip is willing to work with the customer who is concerned about the integrity of their code.
• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
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are for its PIC
®
MCUs and dsPIC
®
DSCs, KEELOQ
®
code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
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QUALITY MANAGEMENT S
YSTEM
CERTIFIED BY DNV
== ISO/TS 16949 ==
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The Microchip name and logo, the Microchip logo, AnyRate,
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All other trademarks mentioned herein are property of their
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© 2016, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
ISBN: 978-1-5224-0492-7
2016 Microchip Technology Inc. DS50002480A-page 3
Object of Declaration: MCP2221 I
2
C Demonstration Board User’s Guide
MCP22 21 I
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C Demonstration Board User’s Guide
DS50002480A-page 4 2016 Microchip Technology Inc.
NOTES:
MCP2221 I
2
C DEMONSTRATION
BOARD USER’S GUIDE
2016 Microchip Technology Inc. DS50002480A-page 5
Table of Con ten ts
Preface ...........................................................................................................................7
Introduction............................................................................................................ 7
Document Layout .................................................................................................. 7
Conventions Used in this Guide ............................................................................ 8
Recommended Reading........................................................................................ 9
The Microchip Web Site ........................................................................................ 9
Customer Support ................................................................................................. 9
Document Revision History ................................................................................... 9
Chapter 1. Product Overview
1.1 Introduction ................................................................................................... 11
1.2 MCP2221 I2C Demonstration Board Description ......................................... 11
1.3 What the MCP2221 I2C Demonstration Board Kit Includes ......................... 13
Chapter 2. Installation and Operation
2.1 Minimum System Requirements .................................................................. 15
2.2 Board Setup ................................................................................................. 15
2.3 Jumpers and Connectors Description .......................................................... 16
2.4 Test Points Description ................................................................................ 18
Chapter 3. Testing Board Features
3.1 About the MPC2221 I2C Demo Board Application ....................................... 19
3.2 General Information Panel Description ........................................................ 20
3.3 Feature Tabs ................................................................................................ 21
Chapter 4. Creating Cus tom I2C Software Applica tions
4.1 USB to I2C .................................................................................................... 39
4.2 PIC16F1509 as I2C Master .......................................................................... 40
4.3 I2C Slave Addresses .................................................................................... 41
Chapter 5. Troubleshooting
5.1 Board Not Detected by PC ........................................................................... 43
5.2 USB Driver Installation Issues ...................................................................... 43
5.3 PC Application Reports “MCP2221 Not Connected” .................................... 43
5.4 PC Application Reports I2C Errors ............................................................... 44
5.5 Issues Programming the PIC® Microcontroller ............................................. 44
MCP22 21 I
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C Demonstration Board User’s Guide
DS50002480A-page 6 2016 Microchip Technology Inc.
Appendix A. Schematics and Layouts
A.1 Introduction .................................................................................................. 45
A.2 Board – Interface Schematic ........................................................................ 46
A.3 Board – Slaves Schematic ........................................................................... 47
A.4 Board – Top Silk .......................................................................................... 48
A.5 Board – Top Copper and Silk ....................................................................... 48
A.6 Board – Top Copper .................................................................................... 49
A.7 Board – Bottom Copper ............................................................................... 49
A.8 Board – Bottom Copper and Silk ................................................................. 50
A.9 Board – Bottom Silk ..................................................................................... 50
Appendix B. Bill of Materials (BOM)...........................................................................51
Worldwide Sales and Service .....................................................................................54
MCP2221 I
2
C DEMONSTRATION
BOARD USER’S GUIDE
2016 Microchip Technology Inc. DS50002480A-page 7
Preface
INTRODUCTION
This chapter contains general information that will be useful to know before using the
MCP2221 I
2
C Demonstration Board. Items discussed in this chapter include:
•Document Layout
•Conventions Used in this Guide
•Recommended Reading
•The Microchip Web Site
•Customer Support
•Document Revision History
DOCUMENT LAYOUT
This document describes how to use the MCP2221 I
2
C Demonstration Board as an
evaluation tool to debug a target motor system. The manual layout is as follows:
•Chapter 1. “Product Overview” – Important information on the board.
•Chapter 2. “Installation and O peration” – Covers the initial setup of this board
and the Graphical User Interface (GUI).
•Chapter 3. “Testing Board Features” – Describes how to use the board’s
capabilities.
•Chapter 4. “Creating Custom I
2
C Software Applications”– Provides
information for the custom usage of the board.
•Chapter 5. “Troubleshooting”– Provides procedures for troubleshooting the
most common problems encountered when installing and operating the board.
•Appendix A. “Schematics and Layouts” – Shows the schematic and layout
diagrams for the board.
•Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the board.
NOTICE TO CUSTOMERS
All documentation becomes dated, and this manual is no exception. Microchip tools and
documentation are constantly evolving to meet customer needs, so some actual dialogs
and/or tool descriptions may differ from thos e in this document. Please refer to our web site
(www.microchip.com) to obtain the latest documentation available.
Documents are identified with a “DS” number. This number is located on the bottom of each
page, in front of the page number. The numbering convention for the DS number is
“DSXX XXXXXXA”, where “XXXXXXXX” is the document number and “A” is the revision le vel
of the document.
For the most up-to-date information on development tools, see the MPLAB
®
IDE online help.
Select the Help menu, and then Topics to open a list of available online help files.
MCP22 21 I
2
C Demonstration Board User’s Guide
DS50002480A-page 8 2016 Microchip Technology Inc.
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
Description Represents Examples
Arial font:
Italic characters Referenced books MPLAB
®
IDE User’s Guide
Emphasized text ...is the only compiler...
Initial caps A window the Output window
A dialog the Settings dialog
A menu selection select Enable Programmer
Quotes A field name in a window or
dialog
“Save project before build”
Underlined, italic text with
right angle bracket
A menu path File>Save
Bold characters A dialog button Click OK
A tab Click the Power tab
N‘Rnnnn A number in verilog format,
where N is the total number of
digits, R is the radix and n is a
digit.
4‘b0010, 2‘hF1
Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>
Courier New font:
Plain Courier New Sample source code #define START
Filenames autoexec.bat
File paths c:\mcc18\h
Keywords _asm, _endasm, static
Command-line options -Opa+, -Opa-
Bit values 0, 1
Constants 0xFF, ‘A’
Italic Courier New A variable argument file.o, where file can be
any valid filename
Square brackets [ ] Optional arguments mcc18 [options] file
[options]
Curly brackets and pipe
character: { | }
Choice of mutually exclusive
arguments; an OR selection
errorlevel {0|1}
Ellipses... Replaces repeated text var_name [,
var_name...]
Represents code supplied by
user
void main (void)
{ ...
}
Preface
2016 Microchip Technology Inc. DS50002480A-page 9
RECOMMENDED READING
This user’s guide describes how to use the MCP2221 I
2
C Demonstration Board. Other
useful documents are listed below. The following Microchip documents are available
and recommended as a supplemental reference resource.
• MCP2221 Data Sheet – “USB 2.0 to I
2
C™/UART/Protocol Converter with GPIO”
(DS20005292)
• PAC1710/20 Data Sheet – “Single and Dual High-Side Curr ent- S ense Monitor
with Power Calculation” (DS20005386)
• MCP3221 Dat a Sheet – “Low-Power 12-Bit A/D Converter With I
2
C™ Interface”
(DS21732)
• MCP9808 Dat a Sheet – “±0.5°C Maximum Accuracy Digital Temperature Sensor”
(DS25095)
• PIC16(L)F1508/9 Data Sheet – “20-Pin Flash, 8-Bit Microcontrollers with XLP
Technology” (DS40001609)
• MCP4706/4716/4726 Data Sheet – “8-/10-/12-Bit V oltage Output
Digital-to-Analog Converter with EEPROM and I
2
C™ Inter face” (DS22272)
• MCP23008 / MCP 23S 08 Data Sheet – “8-Bit I/O Expander with Serial Interface”
(DS21919)
THE MICROCHIP WEB SITE
Microchip provides online support via our web site at www.microchip.com. This web site
is used as a means to make files and information easily available to customers. Accessible
by using your favorite Internet browser, the web site contains the following information:
•Product Support – Data sheets and errata, application notes and sample
programs, design resources, user’s guides and hardware support documents,
latest software releases and archived software
•General Technical Support – Frequently Asked Questions (FAQs), technical
support requests, online discussion groups, Microchip consultant program
member listing
•Business of Microchip – Product selector and ordering guides, latest Microchip
press releases, listing of seminars and events, listings of Microchip sales offices,
distributors and factory representatives
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels:
• Distributor or Representative
• Local Sales Office
• Field Application Engineer (FAE)
• Technical Support
Customers should contact their distributor, representative or field application engineer
(FAE) for support. Local sales offices are also available to help customers. A listing of
sales offices and locations is included in the back of this document.
Technical support is available through the web site at:
http://www.microchip.com/support.
DOCUMENT REVIS ION HISTORY
Revision A (April 2016)
• Initial release of this document.
MCP22 21 I
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C Demonstration Board User’s Guide
DS50002480A-page 10 2016 Microchip Technology Inc.
NOTES:
MCP2221 I
2
C DEMONSTRATION
BOARD USER’S GUIDE
2016 Microchip Technology Inc. DS50002480A-page 11
Chapter 1. Pr oduct Overview
1.1 INTRODUCTION
This chapter provides an overview of the MCP2221 I
2
C Demonstration Board and
covers the following topics:
•MCP2221 I
2
C Demonstration Board Description
•What the MCP222 1 I
2
C Demonstration Board Kit Includes
1.2 MCP2221 I2C DEMONSTRATION BOARD DESCRI PTION
The MCP2221 I
2
C Demonstration Board allows the user to communicate through a PC
application to I
2
C slave devices by using the MCP2221 device as a USB to I
2
C master
converter (bridge). Additionally, it can create a USB to RS-232 (UART) bridge using the
same MCP2221 board.
1.2.1 Board Features Controlled through PC Application
Here are the main features of the demonstration board when used with its dedicated
PC application:
• Users can perform measurements for resistors (above 10Ω) or capacitors (above
40 nF), using the MCP2221 device’s Analog-to-Digital Converter (ADC) and
General Purpose Input/Output (GPIO) pins
• Real-time monitoring and logging of the current, and power consumptions of a
USB device using the PAC1710 current, voltage and power sensor
• Real-time monitoring and logging of the ambient temperature using the MCP9808
temperature sensor
• Real-time monitoring and logging of the voltage level recorded by the MCP3221
device’s 12-bit ADC
• Configuration and control of up to 8 GPIOs, available from the MCP23008 I/O
expander, as well as continuously monitoring the state of the pins (when used as
digital inputs)
• PIC16F1509 configuration to issue multiple warnings through an RGB LED when
any of the featured readings are outside of user settable conditions (such as
“measured USB current is above 50 mA”)
• Storing the above mentioned configuration, as well as other random data, in a
24LC128 128-Kbit Electrically Erasable Programmable Read-Only Memory
(EEPROM)
• Output voltage level control of the MCP4726 Digital-to-Analog Converter (DAC)
• Creating a USB to RS-232 bridge, based on the MCP2221 device and a Texas
Instrument’s MAX3232 transceiver; alternately creating a USB to UART bridge to
the PIC16F1509 microcontroller
MCP22 21 I
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C Demonstration Board User’s Guide
DS50002480A-page 12 2016 Microchip Technology Inc.
1.2.2 Other Hardware Features
The board also provides features that are independent of the software application:
• 5V or 3.3V user-selectable V
DD
, up to 500 mA operating capability for the
demonstration board and all on-board devices.
•I
2
C female socket (similar to the PICkit™ Serial Analyzer) for connectivity to exter-
nal slaves, as well as test points for the I
2
C lines, and the option to
disconnect the on-board, 4.7 k
pull-up resistors for the I
2
C data and clock lines.
• In-Circuit Serial Programming™ (ICSP™) male connector to debug or program
the PIC16F1509 using a PICkit 3 programmer or another compatible tool.
• The option to connect the PIC16F1509 device’s Universal Asynchronous
Receiver/Transmitter (UART) to the board’s RS-232 connector (through the
MAX3232 transceiver).
• A small prototyping area which includes extensions of the board’s power (V
DD
)
and ground (GND) lines.
• Test points to measure the current, voltage or power of non-USB devices (as well
as receive configurable interrupts) using the PAC1710 current-sensing chip.
• Option to connect the interrupt pin of the MCP23008 I/O expander to an external
interrupt pin of the PIC16F1509 for custom applications.
1.2.3 I2C Devices Available on the Board
Ta b l e 1 - 1 identifies the I
2
C devices (master and slaves) available on the MCP2221 I
2
C
Demonstration Board.
TABLE 1-1: I
2
C DEVICES AVAILABLE ON THE MCP2221 BOARD
Device
Name I
2
C
Master/Slave Description
MCP2221 Master USB to I
2
C/UART/SMBus Protocol Converter with GPIO
(Master Mode)
PAC1710 Slave Single High-Side Current Sense Monitor with Power Calculation
24LC128 Slave 128-Kbit EEPROM
MCP9808 Slave Temperature Sensor
MCP3221 Slave 1-Channel, 12-Bit Analog-to-Digital Converter (ADC)
MCP4726 Slave 12-Bit Digital-to-Analog Converter (DAC)
MCP23008 Slave 8-Bit I/O Expander
PIC16F1509 Slave 8-Bit Microcontroller (preprogrammed to perform as I
2
C slave)
2016 Microchip Technology Inc. DS50002480A-page 13
Figure 1-1 illustrates the components on the top view.
FIGURE 1-1: MCP2221 TOP VIEW – I
2
C DEVICES ON THE BOARD
1.3 WHAT TH E MCP2221 I2C DEMONSTRATION BOARD KIT INCLUDES
The MCP2221 I
2
C Demonstration Board Kit (ADM00678) includes:
• MCP2221 I
2
C Demonstration Board
• Preprogrammed PIC16F1509 Microcontroller
• Two Mini-USB Cables
• Important Information Sheet
MCP2221 PIC16F1509
PAC1710
24LC128
MCP9808
MCP3221
MCP4726
MCP23008
MCP22 21 I
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DS50002480A-page 14 2016 Microchip Technology Inc.
NOTES:
MCP2221 I
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C DEMONSTRATION
BOARD USER’S GUIDE
2016 Microchip Technology Inc. DS50002480A-page 15
Chapter 2. Installation and Operation
2.1 MINIMUM SYSTEM REQUIREMENTS
The MCP2221 I
2
C Demonstration Board is designed to be used in a Microsoft
®
Windows
®
XP (SP3 or later) environment, based on the Microsoft.NET Framework 4
(client profile). Users can utilize the Microsoft.NET Framework 4 web installer package
to download and install the Microsoft.NET Framework 4 components.
For USB connectivity, the minimal physical requirement for the PC is a standard
USB 2.0 port. The board connects to the PC via the mini-USB connector (J4). In case
the board connects to the PC through a USB hub, use a self-powered hub.
2.2 BOARD SETUP
Before the MCP2221 I
2
C Demonstration Board can be used, a few steps must be
performed to install the PC software and configure the board’s hardware.
2.2.1 Software Installation
Follow these steps to install the required software:
1. Download the support material (PC application) that can be found on the board’s
page at www.microchip.com.
2. Unzip the archive and install the .exe file. The setup process should also
perform the USB driver installation, if needed. If there are driver-related issues,
refer to Section 5.2 “USB Driver Installation Issues”.
2.2.2 Hardware Setup
Follow these steps to set up the hardware:
1. Check if the board is properly powered from USB by setting jumper J19 to either
5V or 3.3V; by default, it is set to 5V.
2. Connect the MCP2221 I
2
C Demonstration Board to a PC through the mini-USB
port (J4).
MCP222 1 I
2
C Demonstrat ion Board User’s Guide
DS50002480A-page 16 2016 Microchip Technology Inc.
2.3 JU MPERS AND CONNECTORS DES CRIP T ION
Refer to Figure 2-1 to view the default settings for the jumpers and connectors.
FIGURE 2-1: DEFAULT JUMPERS AND CONNECTORS CONFIGURATIONS
Legend:
1 = Enable potentiometer R13 for MCP3221 ADC 6 = Enable LEDs, LD2-LD9, for MCP23008 GPIO expander
2 = Enable board’s I
2
C pull-up resistors, R10 and R11 7 = Enable SDA (data) line of PIC16F1509 for I
2
C connectivity
3 = Connect UART RX of PIC16F1509 to UART TX of MCP2221 8 = Enable SCL (clock) line of PIC16F1509 for I
2
C connectivity
4 = Connect UART RX of MCP2221 to UART TX of PIC16F1509 9 = Enable RGB LED (connect to PIC16F1509)
5 = Set board voltage (V
DD
) to 5V
1
2
3
4
5
6
7
8
9
Installation and Operation
2016 Microchip Technology Inc. DS50002480A-page 17
Ta b l e 2 - 1 describes the functions of all the board’s jumpers and connectors.
TABLE 2-1: MCP2221 BOARD JUMPERS CONFIGURATION
Jumper
Designator Function Description
J1 PDIP socket for PIC16F1509 microcontroller.
J2 Female connector to the MCP4726 Digital-to-Analog Converter; one pin is the DAC output and the
other connects to the ground.
J3 Male connector to the MCP4726 Digital-to-Analog Converter; one pin is the DAC output and the other
connects to the ground.
J4 Mini-B type USB female connector for power and connectivity for MCP2221 from the PC.
J5 RS-232 female connector.
J6 Jumper connecting the I
2
C SDA (data) pin of the PIC16F1509 to the board’s SDA line. This jumper is
connected by default.
J7 Female connector to the MCP3221 Analog-to-Digital Converter; one pin is the ADC custom input and
the other connects to the ground; for custom input, disconnect jumper J18.
J8 Male connector to the MCP3221 Analog-to-Digital Converter; one pin is the ADC custom input and the
other connects to the ground; for custom input, disconnect jumper J18.
J9 Jumper connecting the I
2
C SCL (clock) pin of the PIC16F1509 to the board’s SCL line. This jumper is
connected by default.
J10 Female connector for the MCP9808 temperature sensor. One pin connects to the sensor’s ALERT pin
and the other to the ground.
J11 Male connector for the MCP9808 temperature sensor. One pin connects to the sensor’s ALERT pin and
the other to the ground.
J12 Jumper for configuring the UART/RS-232 traffic directions:
• MCP2221 to PIC16F1509: Short-circuit (RX MCU) with (TX USB), then (TX MCU) with (RX USB).
This is the default setting.
• MCP2221 to RS232: Short-circuit (RX RS-232) with (RX USB), then (TX RS-232) with (TX USB).
• PIC16F1509 to RS232: Short-circuit (RX RS-232) with (RX MCU), then (TX RS-232) with (TX MCU).
J13 Female connector for measuring resistances and capacitances. The ‘–’ (minus) sign indicates the
ground pin in case of measuring polarized capacitors.
J14 Jumper enabling the RGB LED LD1 that connects to the PIC16F1509. The jumper is connected by
default.
J15 Jumper allowing the possibility to connect the interrupt pin of the MCP23008 I/O expander to pin RA2 of
the PIC16F1509. The jumper is not connected by default (not populated).
J16 Female connector to the eight I/O pins of the MCP23008 I/O expander. When using the connector,
consider disabling the LEDs connected to the I/O pins by removing jumper J20.
J17 Male connector to the eight I/O pins of the MCP23008 I/O expander. When using the connector,
consider disabling the LEDs connected to the I/O pins by removing jumper J20.
J18 Jumper connecting the potentiometer R13 to the ADC input pin of the MCP3221 DAC. Disconnect
jumper to allow custom voltage measurements via connectors J7/J8. The jumper is connected by
default.
J19 Jumper for selecting the voltage level (V
DD
) of the board: connect left hand side and middle pins for
3.3V or middle and right hand side pins for 5V. The default setting is for 5V.
J20 Jumper enabling LEDs LD2-LD9 that are connected to the I/O pins of the MCP23008 I/O expander;
consider removing it if using connectors J16 and J17. The jumper is connected by default.
J21 Mini-B type USB female connector used for measuring current, voltage and power with the PAC1710.
This side goes towards the USB voltage source, such as a PC.
J22 A type USB female connector used for measuring current/voltage/power with the PAC1710. Connect
the USB device (load) through this jumper.
J23 In-Circuit Serial Programming™ (ICSP™) connector for the PIC16F1509, compatible with the
PICkit™ 3 debugger/programmer; the white triangle indicates the first pin (MCLR/V
PP
).
MCP22 21 I
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C Demonstration Board User’s Guide
DS50002480A-page 18 2016 Microchip Technology Inc.
2.4 TEST POINTS DESCRIPTION
Ta b l e 2 - 2 describes the board’s test points.
J24 Jumper enabling the 4.7 pull-up resistors for the I
2
C data (SDA) and clock (SCL) lines on the board.
Consider removing it if the demonstration board connects to an external I
2
C slave circuit which already
has I
2
C pull-up resistors. The jumper is connected by default.
J25 I
2
C female connector; similar to the PICkit™ Serial Analyzer connector; however, this one only has the
power and I
2
C lines (V
DD
, GND, SDA, SCL). The white triangle indicates the first pin. Pins 1 and 6 are
not connected.
TABLE 2-1: MCP2221 BOARD JUMPERS CONFIGURATION (CONTINUED)
Jumper
Designator Function Description
TABLE 2-2: MCP2221 BOARD TEST POINTS CONFIGURATION
Test Point
Designator Description
TP1 Test point for measuring resistance or capacitance. If required, connect the positive pin of the polarized
capacitor to this test point.
TP2 Test point (connected to ground) for measuring resistance or capacitance. If required, connect the
negative pin of the polarized capacitor to this test point.
TP3 Test point for the ALERT pin of the PAC1710. This test point is not used by the demonstration board’s
application.
TP4 Test point for the load side (target USB device) of the PAC1710 measuring circuit.
TP5 Test point for the source side (USB Host/PC) of the PAC1710 measuring circuit.
TP6 Test point for the I
2
C SDA line of the board.
TP7 Test point for the I
2
C SCL line of the board.
TP8 Test point connected to ground.
MCP2221 I
2
C DEMONSTRATION
BOARD USER’S GUIDE
2016 Microchip Technology Inc. DS50002480A-page 19
Chapter 3. Testing Board Features
This section describes the working principles and limitations that should be taken into
account when using the board with the dedicated PC application, as well as the actual
steps to use all of the demonstration kit’s features.
It is assumed that the user has already successfully run the installation process
described in Section 2.2 “Board Setup”.
3.1 ABOUT THE MPC2221 I2C DEMO BOARD APPLICATION
The PC application for the device is named the MCP2221 I
2
C Demo Board Application.
The three main sections that can be observed in Figure 3-1 are the Feature tabs,
General Information panel and Setup area.
FIGURE 3-1: THE MCP222 1 I
2
C DEMO BOARD APPLICATION – INITIAL VIEW
Setup Area
General Information Panel
Feature Tabs
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For more information on the General Information panel, see Section 3.2 “General
Information Panel Description”.
The Feature tabs determine the content of the Setup area. For more information, see
Section 3.3 “Feature Tabs”.
3.2 GENERAL INFORMA T ION PANEL DESCRIPTION
3.2.1 The Device Status Label
The Device status label displays whether the board is connected to the PC. One of the
following messages is generated by the system:
•MCP2221 Connected
•MCP2221 not Connected
3.2.2 The Using Custom VID/PID... Button
When clicking the Using Custom VID/PID... button, the Select VID & PID window is
displayed. The window contains information on the VID/PID combination to find the
drivers that are to be used for the USB device.
FIGURE 3-2: THE SELECT VID & PID WINDOW
By default, the values are 0x4D8 for the VID and 0xDD for the PID. New values can be
inserted in the “Look for VID (Hexadecimal Form)” and the “Look for PID (Hexadecimal
Form)” fields. After inserting the new values, click the Update Settings button. Users
can return to the default values by clicking the Use Default Values button.
3.2.3 The I2C Communication Status Box
By default, the “I2C Communication Status” text box is blank. It is populated when
actions are performed in the Feature tabs. The information is system-generated and
read-only.
Message examples include: “EEPROM write successful”, “Pins states updated”,
“Settings saved” and others. If errors are displayed, see Section 5.4 “PC Application
Reports I
2C Errors”
.
3.2.4 The Clear I2C S tatus Box Button
Click the Clear I2C Status Box button to clear the I2C Communication Status box.
Note that clearing the text in the box does not cancel or revert any previously performed
action.
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2016 Microchip Technology Inc. DS50002480A-page 21
3.2.5 The About Button
Click the About button to open a window that contains information on the application’s
version and legal disclaimers. Click the OK button to close the window.
FIGURE 3-3: THE ABOUT WINDOW
3.3 F EATURE TABS
The left panel of the application contains nine tabs that allow the user to explore all the
board’s features:
• Measure R, C
• Measure USB Power
• Measure Temperature
• Read/Write EEPROM
• Read ADC
• Configure DAC
• GPIO Expander
• RGB LED Notifications
• UART Communication
Each tab displays a dedicated setting area when selected.
3.3.1 Measure R, C Tab
Capacitance is determined by measuring the capacitor’s charging time. In case of large
capacitors, the charging time is software limited to 10 seconds, after which, a
mathematical formula is applied to determine the approximate capacitance. The
charging current is provided by a digital output pin of the MCP2221 board and limited
by a 470 kΩ resistor. The Me asure R, C tab also generates a charging graph for the
capacitor, as well as an indicator of its voltage.
Resistance is determined by placing the unknown resistor in series with another known
one, thus creating a voltage divider where relative voltage values are sufficient to
calculate the resistance.
Prior to performing measurements, the pins must be correctly placed in the connector
marked with J13 or use the test points, TP1 and TP2.
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3.3.1.1 TAB OPERATION
To measure a resistor or capacitor, select the Measure R, C tab.
• Click the Measure Resistance button to measure the resistance. The system
displays the approximate resistance and a capacitor charging graph.
• Click the Measure Capacitance button to measure capacitance. The system
displays the approximate capacitance and a capacitor charging graph.
Figure 3-4 shows an example of measuring resistance.
FIGURE 3-4: MEASURING RESISTANCE
3.3.1.2 CONSIDERATIONS AND WARNINGS
• The minimum supported values are around 10Ω for resistors and 40 nF for capacitors.
• To maintain a certain level of accuracy, the maximum recommended values to
measure are ~1 MΩ for resistors and 470
µ
F for capacitors.
• The measurement accuracy may be, in some cases, of about ±10%, therefore the
MCP2221 I
2
C Demonstration Board Kit is not recommended for precision
measurements.
• For both capacitor and resistance measurements, voltages are generated by
digital output pins and measured using the analog input pins of the MCP2221 I
2
C
Demonstration Board.
Note: In case of a polarized capacitor, make sure the pins are correctly placed –
the ‘+’ (plus) and ‘–’ (minus) signs on the board must be next to connectors,
J13 and TP2.
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2016 Microchip Technology Inc. DS50002480A-page 23
3.3.2 Measure USB Power Tab
The Measure USB Power tab allows users to perform current, voltage or power
measurements of a USB device.
Prior to measuring the current/power of the USB device, make sure that:
• The load to be measured (for example a USB mouse) is connected to the
MCP2221 board’s USB socket marked with J22
• The power source (such as the PC) is connected to the mini-USB socket marked
with J21
3.3.2.1 TAB OPERATION
Users can determine what measurements the system should perform by selecting at
least one of the following check boxes: “Chart Voltage”, “Chart Current” or “Chart
Power”.
The “Show Numbers” check box determines whether numerical values for voltage,
current and power will also be indicated in real time inside its corresponding text box.
If the check box is selected, current and power will be indicated in real time.
Generated data can be saved using the “Log into .CSV File …” check box. When the
check box is selected, the Open window opens to allow users to select the .csv file or
create a new document, where the measured data can be logged. Figure 3-5 depicts
this action.
FIGURE 3-5: SELECTING A .csv FILE
It is advisable to use comma separated values for the.csv file type to be Microsoft
®
Excel
®
compatible.The .csv file is generated by the application, with four columns,
and each set of readings is placed on a row. The columns are: Data entry index,
Voltage (in Volts), Current (in Amps), Power (in Watts). Logging can be turned off by
clearing the check box.
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Click the Start Measurement button for the system to start performing measurements.
Pressing the Stop Measurement button interrupts the measurements.The Reset
Measurement button clears all the previously generated data and prepares the system
for new measurements.
The Measure All One Time button is for the application to retrieve, in real time, just
one set of numeric values (for voltage, current and power) and to write them in the cor-
responding text box below it. This can be used as an alternate solution to
Start Measurement in order to save system resources.
Figure 3-6 shows an example for measuring the current, voltage and power of a USB
Flash drive when connected to the PC via the measuring circuit.
FIGURE 3-6: MEASURING CURRENT, VOLTAGE AND POWER OF A USB DEVICE
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2016 Microchip Technology Inc. DS50002480A-page 25
3.3.2.2 WARNINGS AND CONSIDERATIONS
• When measuring the current/power consumption, it is recommended to connect
the loads (devices) that do not draw a current above ~2.5A.
• A shunt resistor of 0.025Ω is used, which sets the PAC1710 chip’s full-scale cur-
rent value to 3.2A. However, current limitations are also imposed by the MCP2221
board’s design.
• In case of continuous measurement, samples are taken once every 100 milliseconds,
so higher frequency variations may not be noticed by the application.
• The software provides the option not to display specific variations (such as popu-
lating the voltage graph, for example) to reduce the amount of tasks that the PC
must perform. This is especially useful when the PC is running low on system
resources (like processor usage or memory filling).
• Even when switching to a different tab (such as measuring resistors), if the
monitoring is enabled, then it will not be automatically halted unless the board is
physically disconnected from the PC. Therefore, it is recommended to stop
performing the measurements when they are no longer required.
3.3.2.3 NOTIFICATIONS FUNCTIONALITY
The MCP2221 board also provides three access points (TP3, TP4 and TP5), described
in Section 2.3 “Jumpers and Connectors Description”.
The PAC1710 chip can be configured to signal notifications via the ALERT pin that’s
connected to the TP3 test point of the MCP2221 I
2
C Demonstration Board.
For custom measurements, it’s highly recommended to read the data sheet for the
PAC1710 chip, as well as view the schematic and layouts of the board, available in
Appendix A. “Schematics and Layouts” of this document.
3.3.3 Measure Temperature Tab
The temperature sensor is built into the MCP9808 chip. The sensor’s accuracy
depends on the temperature value intervals, as seen in the following table:
In the case of continuous monitoring, samples are taken once every 100 milliseconds,
so higher frequency variations may not be noticed by the software.
The software provides the option not to display specific variations (for example, popu-
lating the temperature graph) to reduce the amount of tasks that the PC must perform.
This is especially useful when the PC is running low on system resources (such as
processor usage or memory filling).
Even when switching to a different application tab, if the monitoring is enabled, then it
will not be automatically halted unless the board is physically disconnected from the
PC. Therefore, it is recommended to stop performing the measurements when they are
no longer required.
Temperature Value Intervals Accuracy
-40°C to +125°C ±0.25° (typical)
-20°C to +100°C ±0.5°C (maximum)
-40°C to +125°C ±1°C (maximum)
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3.3.3.1 TAB OPERATION
The Measure Temperature tab allows users to perform temperature measurements.
The “Show in Chart” check box determines if a graph is displayed during the real-time
measurements. Users can choose the measuring unit (Fahrenheit or Celsius) inside
the “Unit” radio button group.
The functionalities of the “Show Numbers” and the “Log into .CSV File...” check boxes
are similar to the ones described in Sec ti on 3.3.2 “Measure USB Power Tab”.
However, the .csv file contains two columns and each set of readings is placed on a
row. The columns are: Data entry index and Temperature.
The functionalities of the Start Measurement, Stop Measurement and Reset
Measurement buttons are similar to the ones described in Section 3.3.2 “Measure
USB Power Tab”.
Click the Measure Temperature Once button for the application to retrieve, in real
time, just one set of numeric values (for temperature) and to write them in the
corresponding text box below it. This can be used as an alternate solution to Measure
Temperature, in order to save system resources.
For example, the application can be set so that temperatures exceeding 26°C will result
in an orange LED blinking on the board. Custom LED notifications are described in
Section 3.3.8 “RGB LED Notifications Tab”.
Figure 3-7 shows an example for measuring the temperature in °C.
FIGURE 3-7: TEMPE RATURE MEASUREM ENT
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2016 Microchip Technology Inc. DS50002480A-page 27
3.3.3.2 NOTIFICATIONS FUNCTIONALITY
The MCP9808 temperature sensor can be configured to output an alert signal when the
temperature changes beyond the specified boundary limits. The signal can be read on
the MCP2221 board through the pin extensions marked with J10 and J11. More
information is available in Section 2.3 “Jumpers and Connectors Description”.
3.3.4 Read/Write EEPROM Tab
The 24LC128 EEPROM is organized into 256 pages of memory (numbered from 0 to
255), each containing 64 bytes of data. The MCP2221 I
2
C Demo Board Application dis-
plays the memory content per page, organized in a matrix of 16 rows and 4 columns.
Data and addresses are displayed in hexadecimal form.
The last page of the EEPROM, page 255, is also used to store the LED notifications
configuration that is described in S ec tion 3.3.8 “RGB LED Notifications Tab” .
By default, all the memory bytes are set as 0xFF.
Writing to a data cell will cause the EEPROM to rewrite the cell’s entire page.
3.3.4.1 TAB OPERATION
Follow these steps to write to a specific cell or page of the EEPROM:
1. Select the Read/Write EEPROM tab.
2. From the “Select Page” drop-down, choose the EEPROM memory page you
want to read or write.
3. The address of the cell can be determined by adding the column and row indexes
in the matrix table below. Edit a cell by double-clicking on it and entering the 8-bit
value in hexadecimal form (example: for 0x1C, write 1C). Users must enter a
valid number in hexadecimal form, between 0x00 and 0xFF.
4. To update the EEPROM content, click the Write Page button. Figure 3-8 shows
an example of writing the 0x1A value to address 0x1D0
(Memory Page
Number 7).
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FIGURE 3-8: WRITING INTO THE EEPROM
To read an EEPROM page:
1. Select the desired page number from the “Select Page” drop-down.
2. Click the Read Page button.
The Erase All EEPROM Data button resets the entire content of the EEPROM to 0xFF.
The Reset Entire T able to 0xFF button only affects the displayed matrix, not the actual
EEPROM memory.
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2016 Microchip Technology Inc. DS50002480A-page 29
3.3.5 Read ADC Tab
The MCP3221 Analog-to-Digital Converter uses both a fixed 2.5V voltage reference
and the power supply from an MCP1525 voltage reference chip, which allows the
conversion to be independent of the demo board’s power line: 3.3V/5V.
Therefore, the analog voltage to be measured must be between 0 and 2.5V. The board
can be used to measure the voltage from:
• Potentiometer R13, from the 2.5V supply that’s also powering the MCP3221 if
jumper J18 is connected (the default setting);
or
• An external source (via J7 and J8) if jumper J18 is disconnected.
In case of continuous monitoring, samples are taken once per 100 milliseconds, so
higher frequency variations may not be noticed by the PC application.
The software provides the option not to display specific variations (such as populating
the ADC graph) to reduce the amount of tasks that the PC must perform. This is
especially useful when the PC is running low on system resources (such as processor
usage or memory filling). Even when switching to a different application tab, if the
monitoring is enabled, then it will not be automatically halted unless the board is
physically disconnected from the PC. Therefore, it is recommended to stop performing
the measurements when they are no longer required. Prior to performing measure-
ments, make sure to select the analog voltage source by connecting or removing
jumper J18. See Tab le 2 -1 for more information.
3.3.5.1 TAB OPERATION
Select the Read ADC tab to perform ADC measurements.
The “Show in Chart” check box determines whether a chart is generated by the system
to illustrate the measured values.
The functionalities of the “Show numbers” and the “Log into .CSV File...” check boxes
are similar to the ones described in Sec ti on 3.3.2 “Measure USB Power Tab”.
However, the .csv file contains two columns and each set of readings is placed on a
row. The columns are: Data entry index, Voltage (in Volts).
The functionalities of the Start Measurement, Stop Measurement and Reset
Measurement buttons are similar to the ones described in Section 3.3.2 “Measure
USB Power Tab”.
The Measure ADC Voltage Once button is for the application to retrieve, in real time,
just one set of numeric values (for voltage) and to write them inside the text box below
it. This can be used as an alternate solution to Start Measurement in order to save
system resources.
Custom LED notifications (for example: voltage readings above 2.31V results in a green
LED blinking on the board) are described in Section 3.3.8 “RGB LED Notifications T ab”.
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Figure 3-9 shows an example for measuring the voltage:
FIGURE 3-9: VOLTAGE MEASUREMENT
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3.3.6 Configure DAC Tab
The MCP4726 DAC (Digital-to-Analog Converter) uses an MCP1525 as a 2.5V voltage
reference, thus allowing it to generate a fixed voltage no matter if the board’s power
(V
DD
) is set to 3.3V or 5V.
The MCP4726 also has the option to set a 2x reference gain, which means that only if
the MCP2221 I
2
C Demonstration Board works at 5V (jumper J19 is set to 5V), then the
analog voltage output can be as high as 5V. This option can be enabled from the PC
application.
3.3.6.1 TAB OPERATION
Follow these steps to set the voltage value for the DAC:
1. Select the Configure DAC tab.
2. From the Select Reference Voltage radio button group, choose the preferred
voltage. The default value is 2.5V. Note that users should only select 5V if the
V
DD
value is 5V.
3. To set the output voltage, use one of the following formats:
- Inside the text box corresponding to the “Write Value in Volts” text box, type
in the numeric value;
or
- Select the “Set Voltage in Real Time” check box, then adjust the slider. The
resulting values will be shown in the text box corresponding to “Write Value
in Volts (Example: 2.35)” label. Use a period (.) and not a comma (,) to write
the value.
4. Regardless of the method used to set the output voltage, the voltages are only
submitted to the board after the user clicks the Set Voltage button. The value is
also displayed below the “Current Voltage” label, inside the corresponding
read-only text box.
5. To read the output voltage value back from the chip’s register, click the Read
Voltage Data button. The value is displayed in the read-only text box, below the
“Current Voltage” label.
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Figure 3-10 shows how to configure the DAC to output 1.45V.
FIGURE 3-10: CONFIGURING THE DIGITAL-TO-ANALOG CONVERTER
3.3.7 Digital I/O Pins Tab
The MCP23008 pin expander provides access to eight configurable digital input/output
pins. Short-circuiting jumper J20 connects LEDs, LD2, LD3,…,LD9, to the eight pins.
The eight general purpose pins are also accessible via connectors J16 and J17. For
example, if a pin is configured as an output and intended to be connected to an external
circuit or component via J16 or J17, it may help to remove jumper J20 in order to
preserve the pin’s current driving strength.
In case a pin is used as a digital input, a logical high input signal should match the
demonstration board’s power level (3.3V or 5V, determined via jumper J19). For more
information on voltage tolerances, see the “ MCP 23 008 / MCP 23S08 Data Sheet”
(DS21919).
Even when switching to a different application tab (such as for measuring resistors), if
the pin state monitoring (auto-read) is enabled, then it will not be automatically halted
unless the board is physically disconnected from the PC. Therefore, it is recommended
to stop performing the readings when they are no longer required.
Custom LED notifications for pin GP0 (for example: the pin having a logical high state
results in a yellow LED blinking on the board) are described in Section 3.3.8 “RGB
LED Notifications Tab”.
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2016 Microchip Technology Inc. DS50002480A-page 33
3.3.7.1 TAB OPERATION
To control the digital I/O pins, follow these steps:
1. Select the GPIO Expander tab.
2. Configure the pin directions (input or output) under the “Set GPIO Direction”
section. The configuration only becomes active after the user clicks the Submit
Pin Directions button.
3. For the pins that are set as outputs, the “Configure Pin State (if Output)” section
allows the user to change their state in one of the following ways:
- All at once, if the “Instant Command” check box is cleared and when
clicking the Submit Pin S tates button;
or
- Individually (real-time state toggling), the “Instant Command” check box is
selected.
In case a pin is configured as an input, these pin state control commands are ignored.
Reading the states for all eight general purpose pins can be done by either:
• Automatically (continuously, every 100 milliseconds), in case the “Auto Read
Every 100ms” check box is selected;
or
• Manually, by clicking on the Read Pi n States button.
Figure 3-11 shows an example of using the GPIO Expander tab.
FIGURE 3-11: INTERFACING THE GPIO EXPANDER
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3.3.7.2 UNIMPLEMENTED FEATURES
The MCP23008 also has a separate interrupt output pin which can be used to signal to
the I
2
C master, a logical state change of one of its input pins.
By default, the interrupt pin is not connected to the MCP3221. It can be connected to
the RA2 pin of the PIC16F1509 by short-circuiting jumper J15, in case of a custom
application, where, for example, the PIC16F1509 is programmed to perform as an I
2
C
master.
3.3.8 RGB LED Notifications Tab
LED notifications can be configured to indicate certain events related to the readings
described in the previous sections.
The LED can indicate events every 500 milliseconds (including 100 milliseconds of
specific color) allocated per I
2
C device:
• PAC1710 USB voltage, current or power consumption
• MCP9808 temperature sensor
• MCP3221 analog voltage value
• MCP23008 GP0 pin state change
In the remaining 100 milliseconds from one time period, the LED will be powered off.
In case a device does not have notifications enabled for its corresponding time interval,
the LED will also be powered off.
As a general observation, higher frequency events may not be noticed in time to be
signaled by the LED.
Notifications are done using the RGB LED LD1, that is fully controlled by three
Pulse-Width Modulation (PWM) pins of the PIC16F1509, which receives commands
(as I
2
C slave) from the MCP2221 DLL through the MCP2221 board. The LED color and
brightness are configured from the PC application. It is recommended to avoid light
color tones, because they can translate into very intense LED brightness.
Prior to attempting to configure the LED notifications, make sure that:
• The PIC16F1509 microcontroller is present in socket J1 and that it can
communicate via I
2
C (jumpers J6 and J9 must be connected)
• Jumper 14 is connected to enable the RGB LED LD1
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2016 Microchip Technology Inc. DS50002480A-page 35
3.3.8.1 TAB OPERATION
Follow these steps to enable a notification:
1. Open the RGB LED Notifications tab.
2. The Preview Color… button brings up the Color window, allowing users to
choose colors.
FIGURE 3-12: COLOR WINDOW
3. After selecting the desired colors, click the OK button and the system changes
the LED color accordingly.
4. To enable a specific notification, select the color you want in the “Blink” radio
button group corresponding to the notification. You can either:
- Select the default color (blue, red, green or white) available for each of the
four notifications;
or
- Set any color by selecting the “custom color...” radio button. In the Color
window (Figure 3-12), choose one of the basic colors or define a new color
and click OK.
5. Set the notification conditions, including the numeric value for comparison, if
applicable.
6. Click the corresponding “Enable” check box.
7. Optional. Users can also click the Save Preferences into EERPROM button to
save the current created configuration inside the 24LC128 EEPROM that’s on
the MCP2221 board (data is stored inside its last memory page, 255). Also, the
Load Prefer ences from EEPROM button can be used to restore configurations
from the EEPROM.
Note: Changing a numeric value used for the comparison will clear the “Enable”
check box.
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Figure 3-13 shows how the LED is configured to blink (blue color) in case the measured
USB current exceeds 85 mA.
FIGURE 3-13: CONFIGURING LED NOTIFICATIONS
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2016 Microchip Technology Inc. DS50002480A-page 37
3.3.9 UART Communication Tab
There are several combinations of connectivity, which are determined through
jumper J12:
• (Default Setting): MCP2221 (from PC) to PIC16F1509. Every time the
PIC
®
microcontroller receives a character from the MCP2221, it increments its
value and sends it back.
• MCP2221 (from PC) to RS-232 connector.
• PIC16F1509 to RS-232. Unless the PIC microcontroller is reprogrammed, it will
behave the same as in Case 1 described above.
For the first two cases, data loss (sent or received) may be noticed inside the PC
application’s text box due to the nature of the .NET Framework that is used by the
application. A work around is to use a third-party PC application for COM port bridging.
3.3.9.1 TAB OPERATION
To receive information on the COM ports present in the system, follow these steps:
1. Open the UART Communication tab.
2. Click the Get COM Port s Info button for the system to display information (in the
text box below it) about the COM ports present in the system; this can be used
to determine the COM port number of the MCP2221 USB to I
2
C/UART converter
from the demonstration board.
3. Select the COM port number from the drop-down box. The system will populate
the “Baud:”, “Data Bits:” and “Stop Bits:” fields. For example, the settings in the
case of communication between MCP2221 and PIC16F1509 (determined
through jumper J12) are: Baud: 9600, Data Bits: 8, Stop Bits: 1.
4. Open the COM port by clicking the Open Port button.
5. Received data is automatically added inside the read-only text box on the
right-hand side as red colored text.
To send data, follow these steps:
1. Open the UART Communication tab.
2. Enter the information you want to communicate in the text boxes corresponding
to the Text 1, Text Line 2 and Text Line 3 buttons, under the “Send data:”
section.
3. “Sent data:” can be seen inside the read-only text box on the right-hand side
(combined with the received data) if the “Show Sent Data” check box is selected.
4. The buttons, T ext Line 2 and Text Line 3, place the sent/received data on a new
line inside the text box.
5. To clear the text box, click the Clear Serial Data Box button.
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Figure 3-14 shows an example of sending the text ‘12’ to the PIC microcontroller and
receiving ‘23’ back.
FIGURE 3-14: UART COMMUNICATION WITH THE PIC16F1509
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2
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BOARD USER’S GUIDE
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Chapter 4. Cr eating Custom I
2
C Software Applications
This chapter provides a few suggestions on how to get started in developing custom
applications that involve I
2
C communication, using the MCP2221 I
2
C Demonstration
Board.
Section 4.1 “USB to I
2
C”: The MCP2221 is the I
2
C master and the Graphical User
Interface (GUI) lies on a USB Host (such as a PC or Android device).
Section 4.2 “PIC16F1509 as I
2
C Master”: The PIC16F1509 which is available on the
board (or a pin-compatible PIC
®
microcontroller) is presumed to be the I
2
C master,
while also using (or not) the MCP2221.
Section 4.3 “I
2
C Slave Addresses”: Lists the I
2
C slave addresses of the devices
found on the demonstration board.
4.1 USB TO I2C
This section discusses two aspects of a USB to I
2
C custom application:
• Interfacing the MCP2221 I
2
C Demonstration Board from a different PC
application, or even, an operating system.
• Connecting external I
2
C slaves to the MCP2221 I
2
C Demonstration Board.
4.1.1 Using a Different Operating System or Application
The MCP2221 can be accessed via USB from several types of operating systems:
Windows
®
, Linux
®
, Mac
®
or Android. The required USB drivers and related information
are available on the MCP2221 official web site.
Also available for download are several applications that can be used for I
2
C transfer
and for GPIO pin configuration, such as the MCP2221 I
2
C/SMBus Terminal for
Windows or the MCP2221 Terminal Android Application for Android.
In order to create a custom application (GUI), the user can call the MCP2221 associ-
ated functions (for its configuration or actual data transfer) through the DLL files that
can be downloaded from the same location.
For Android, the source code for the application and the available libraries can be used
as a basis for developing a new application.
See the “Recommended Reading” section for more information on the I
2
C slave
devices.
4.1.2 Connecting External I2C Slaves to the Board
The MCP2221 I
2
C Demonstration Board also provides the possibility to connect
external I
2
C slave devices using the female connector J25. This is same as the one
from the PICkit™ Serial Analyzer in terms of I
2
C connectivity. The white colored triangle
indicates the first pin of the socket.
MCP22 21 I
2
C Demonstration Board User’s Guide
DS50000000A-page 40 2016 Microchip Technology Inc.
These are the pin designations:
- Pin 1: Not connected
-Pin 2: V
DD
(power) must be provided by the I
2
C demonstration board and it is
user-selectable (3.3V or 5V via jumper J19)
- Pin 3: GND (ground connection)
- Pin 4: SDA (I
2
C data line)
-Pin 5: SCL (I
2
C clock line)
- Pin 6: Not connected
Additional test points are available in the case, for example, of connecting a logical
analyzer to the demo board’s I
2
C bus:
- TP6: Test point connected to the I
2
C data line
- TP7: Test point connected to the I
2
C clock line
- TP8: Test point connected to ground
4.2 PIC16F1509 AS I2C MAS TER
There may be the case where it is desirable to have the PIC16F1509 microcontroller
as the I
2
C master with no required USB communication. This section contains
information related to the hardware connectivity (power supply and I
2
C
communication), as well as programming the PIC16F1509.
4.2.1 Hardware Connectivity
For powering the board, there are two possibilities:
1. From the PC, via the mini-USB connector J4 (USB Host) or a from a USB charger
adapter that provides a constant 5V (DC) and at a recommended minimum of
200 mA. In this case, the board’s voltage level can be set to either 3.3V or 5V,
depending on how jumper J19 is connected.
2. By connecting an external power supply (between 3.3V and 5V) to the board’s
V
DD
power line, ideally through:
• The V
DD
pin that is available on the ICSP™ (In-Circuit Serial Programming™)
connector marked with J23;
or
• The V
DD
pin that is available on the female connector J25.
To enable I
2
C communication, make sure that:
• The PIC16F1509 connects to the I
2
C bus by short-circuiting jumpers J6 and J9.
• The I
2
C data and clock lines’ pull-up resistors are connected; if no pull-up
resistors are externally connected to the board, then jumper J24 must be
connected.
Note: If the externally connected I
2
C slave already has its own pull-up resistors
connected to the I
2
C data and clock lines, the ones available on the demo
board can be disconnected by removing jumper J24.
Note: In case a power supply is connected directly to the V
DD
line, jumper J19
should be completely disconnected to avoid unwanted current flow. This
flow could affect the board’s MCP1825 voltage regulator or the USB
connector marked with J4.
Creating Custom I
2
C Software Applications
2016 Microchip Technology Inc. DS50000000A-page 41
4.2.2 Programming the PIC16F15 09
The PIC16F1509 can be programmed via the ICSP (In-Circuit Serial Programming)
connector marked with J23, with tools such as the PICkit™ 3 or compatible
debuggers/programmers. In case there are programming issues, consult
Chapter 5. “Tro ubleshooting” in this document.
The source code for the PIC microcontroller can be written using MPLAB
®
X IDE and
the XC8 C compiler that are available for download at http://www.microchip.com.
Part of the code, including for the I
2
C master, can be generated automatically using the
MPLAB Code Configurator plug-in.
4.3 I2C SL AVE ADDRES SES
This section lists the addresses of the I
2
C slave devices that are available on the
demonstration board. The values displayed in Tab le 4 -1 are in the 8-bit form and can
be used directly as parameters during application development when calling the
MCP2221.DLL functions.
The 8-bit equivalent (write address) of a 7-bit I
2
C address is the result of a
left-shift-once (or multiplication by 2) of the 7-bit address.
TABLE 4-1: LIST OF I
2
C SLAVE ADDRESSES
Device I
2
C Write 8-Bit Address I
2
C Read 8-Bit Address
24LC128 0xA0 0xA1
MCP23008 0x40 0x41
MCP3221 0x9A 0x9B
MCP4726 0xC0 0xC1
MCP9808 0x32 0x33
PAC1710 0x5C 0x5D
PIC16F1509 0x10 0x11
MCP22 21 I
2
C Demonstration Board User’s Guide
DS50000000A-page 42 2016 Microchip Technology Inc.
NOTES:
MCP2221 I
2
C DEMONSTRATION
BOARD USER’S GUIDE
2016 Microchip Technology Inc. DS50002480A-page 43
Chapter 5. Troubleshooting
This chapter handles a number of possible scenarios that may occur when the
MCP2221 I
2
C Demonstration Board does not function as expected.
5.1 BOARD NOT DETECTED BY PC
In case the PC does not signal, either visually or acoustically, that the MCP2221 board
has been connected, perform the following actions:
• Check the board’s power selection jumper. Make sure jumper J19 is connected
and that its default position is for 5V operation.
• Connect the PC to the correct on-board mini-USB socket. The board communi-
cates with the PC and it is also powered using the mini-USB connector marked
with J4, not J21.
• Verify that enough power is provided to the board. If the board connects through a
USB hub, then the hub should be self-powered.
5.2 USB DRIVER INSTALLATION ISSUES
When connecting the MCP2221 board to a PC running a Windows
®
operating system,
the USB driver should install automatically. In case the process is not successful, the
driver can be downloaded from http://www.microchip.com/mcp2221, extracted to a
folder on the local drive and then installed manually, as described below.
1. From the Start menu, select Control Panel>Device Manager. Connect the board
to the PC and see what device is added to the list under Ports.
2. Right-click on the device and click the Update Driver Software… button.
3. Manually select the folder where the driver has been extracted.
4. Click OK.
After the driver installs, a system restart may be required.
5.3 PC APPLICATION REPORTS “MCP2221 NOT CONNECTED”
When a USB device (such as the MCP2221) connects to the USB Host (such as the
PC), the host will ask for the device’s Product and Vendor IDs (VID & PID).
The default values for the MCP2221 are 0x4D8 and 0xDD. In case any of these values
has been changed by the user, and the USB.inf driver file has been customized
accordingly and has been installed properly, then the PC application will report the
“MCP2221 not connected” error message. In such a case, the application can be
configured to look for a device with custom values by clicking the Usi ng Custom
VID/PID… button.
Note: The MCP2221 I
2
C Demo Board Application does not rewrite the VID & PID
inside the MCP2221 board. This can be done using the MCP2221 Utility
which can be downloaded from http://www.microchip.com. However, extra
knowledge in terms of legal and technical implications is required.
MCP22 21 I
2
C Demonstration Board User’s Guide
DS50002480A-page 44 2016 Microchip Technology Inc.
5.4 PC APP LICATION REPORTS I2C ERRORS
If the text box corresponding to the I
2
C Communication Status label indicates an error
followed by a number, then the physical and logical setup of the I
2
C bus should be
checked. Perform the following verifications:
• Check the pull-up resistors. External I
2
C circuits connected to the MCP2221 I
2
C
Demonstration Board may have their own pull-up resistors for the I
2
C data and
clock lines, in which case, jumper J24 should be removed depending on the
resulting resistances; otherwise, J24 must be connected.
• Check for slave address conflicts. In case there are external I
2
C slaves connected
to the board, make sure there are no overlapping addresses. The list of addresses
of the devices available on the board is detailed in Section 4.3 “I
2
C Slave
Addresses of this document.
• Check the I
2
C error codes. The codes are available inside the “MCP2221
Breakout Module User’s Guide” (DS50002282, package version 06/17/2015)
available at www.microchip.com.
5.5 ISSUES PROGRAMMING THE PIC® MICROCONTROLLER
In case the PICkit™ 3 (or another Microchip debugger/programmer compatible to the
PIC microcontroller) is configured to provide power to the target device, but reports that
PIC16F1509 cannot be programmed, the cause may be that the PICkit 3 cannot
provide enough power to the PIC device.
In such a case, it is recommended to power the MCP2221 board externally through:
• The mini-USB connector marked as J19 (as opposed to powering from the
PICkit 3) from the PC;
or
• A USB charger that provides a constant 5V (DC) at a recommended minimum of
200 mA if the microcontroller supports this voltage level.
MCP2221 I
2
C DEMONSTRATION
BOARD USER’S GUIDE
2016 Microchip Technology Inc. DS50002480A-page 45
Appendix A. Schematics and Layouts
A.1 INTRODUCTION
This appendix contains the schematics and layouts for the following devices which are
included in the MCP2221 I
2
C Demonstration Board Kit (ADM00678):
•Board – Interface Sch ema tic
•Board – Slaves Schematic
•Board – Top Silk
•Board – Top Copper and Silk
•Board – Top Copper
•Board – Bottom Copper
•Board – Bottom Copper and Silk
•Board – Bottom Silk
MCP222 1 I
2
C Demonstrat ion Board User’s Guide
DS50002480A-page 46 2016 Microchip Technology Inc.
A.2 BOARD – INTERFACE SCHEMATIC
VDD
1
GP0
2
GP1
3
RST
4
UART RX
5
UART TX
6
GP2
7GP3 8
SDA 9
SCL 10
VUSB 11
D- 12
D+ 13
VSS 14
VDD
P0
G
P1
RS
T
UA
RT RX
U
ART TX
G
P2
G
P
3
S
D
A
SCL
V
U
S
B
D-
D
+
VSS
U3
MCP2221
ID
4
VBUS
1
GND
5
D-
2
D+
3
0
USB Mini-B
J4
GND
D_N
D_ND_P
D_P
VDD
5V
VUSB
SCL
SDA
GP3
GP0
GP1
RESET
RX_MCP
TX_MCP
GP2
GND VIN
1
GND
2
VOUT 3
U2
MCP18255V
4.7uF
10V
0603
C15
GNDGND
0.1uF
16V
0603
C16
GND
1
1
2
3
HDR-2.54 Male 1x3
J19
4.7uF
10V
0603
C17
GND
VDD
5V
10k
0603
5%
R2
VDD
SCL SDA
10k
0603
1%
R3
10k
0603
1%
R5
GND
TP LOOP Black
TP1
12
HDR-2.54 Female 1x2
J13 GND
TP LOOP Black
TP2
10k
0603
1%
R4
0.1uF
16V
0603
C14
0.47uF
6.3V
0603
C2
VDD
GND GND
USB connector for MCP2221 Power module I2C Pull-Up Resistors
470k
0603
1%
R6
4.7k
0603
5%
R10
4.7k
0603
5%
R11
12
HDR-2.54 Male 1x2
J24
GND
VDD
1
2
3
4
5
6
HDR-2.54 Female 1x6
J25
SDA
SCL
TP LOOP Black
TP7
TP LOOP Black
TP6
SCL
SDA
TP LOOP Black
TP8
GND
MCP2221 and R/C measurement circuit I2C bus pinouts
1
2
3
4
5
6
7
8
9
DE-9 Female
J5
1
1
2
34
56
78
HDR-2.54 Male 2x4
J12
TX_MAX
RX_MAX
RX_MAX TX_MAX
TX_PIC/RB7
TX_MCP
GND
0.1uF
16V
0603
C6
GND
VDD
0.1uF
16V
0603
C4
0.1uF
16V
0603
C5
GND
0.1uF
16V
0603
C1
0.1uF
16V
0603
C3
MAX3232 UART adapter and RS-232 connector
RX_MCP
RX_PIC/RB5
UART connectivity selection jumpers
4
5
6
7
8
9
10
16
15
14
13
12
11
17
1
2
3
19
18
20
J1
VDD
RA5
RA4
MCLR/RA3
RC5
RC4
RC3
RC6
RC7
TX_PIC/RB7
VSS
RA0/ICSPDAT
RA1/ICSPCLK
RA2
RC0
RC1
RC2
RB4
RX_PIC/RB5
RB6
GND
10k
0603
5%
R1
2
1
43
GREEN
RED
BLUE
5
6
CLX6A-FKB-CK1P1G1BB7R3R3
LD1
LED_RGB
GND
12
HDR-2.54 Male 1x2
J14
12
HDR-2.54 Male 1x2
J9
12
HDR-2.54 Male 1x2
J6
SCL
SDA
IO_INT
PIC16F1509 microcontroller
1
2
3
4
5
6
HDR-2.54 Male 1x6
J23
MCLR/RA3
VDD VDD
VSS
RA0/ICSPDAT
RA1/ICSPCLK
RA2
1.5k
0603
5%
R7
3.3k
0603
5%
R8
2.7k
0603
5%
R9
12
HDR-2.54 Male 1x2
J15
ICSP connector
MCP23008 interrupt pin to PIC
VDD
C1+
1
V+
2
C1-
3
C2+
4
C2-
5
V-
6
DOUT2
7
RIN2
8ROUT2 9
DIN2 10
DIN1 11
ROUT1 12
RIN1 13
DOUT1 14
GND 15
VCC 16
C
1
+
V+
C
1
-
C
2
+
C
2
-
V-
DOUT
2
RI
N2
RO
UT
2
D
I
N
2
D
I
N1
ROU
T1
R
I
N1
DOU
T1
G
N
D
VCC
MAX3232
U1
VUSB
0.1uF
16V
0603
C21
GND
Schematics and Layouts
2016 Microchip Technology Inc. DS50002480A-page 47
A.3 BOARD – SLAVES SCHEMATIC
SENSE+ 1
SENSE- 2
NC1 3
NC2 4
GND 5
ADDR_SEL
6ALERT#
7SMDATA
8SMCLK
9VDD
10
GND1
11
S
EN
S
E
+
S
EN
S
E-
N
C1
N
C
2
G
ND
A
DDR
_S
E
L
A
LERT#
S
MD
A
T
A
S
M
C
LK
V
DD
G
ND1
PAC1710
U6
GND
20k
0603
5%
R21
TP LOOP Black
TP3
0.1uF
16V
0603
C18
GND
VDD
GND
1uF
10V
0603
C19
SCL
SDA
GND
GND
ID 4
VBUS 1
GND 5
D- 2
D+ 3
0
USB Mini-B
J21
VBUS
1
GND
4
D-
2
D+
3
V
BU
S
G
ND
D-
D+
0
USB-A Female
J22
TP LOOP Black
TP5
TP LOOP Black
TP4
GND GND
SENSE_P SENSE_N SENSE_P SENSE_N
PAC1710 USB current and power measurer
0.025R
2512
1%
R17
A0
1
SDA 5
A2
3A1
2WP 7
VSS 4
SCL 6
VCC
8
U4
24LC128
0.1uF
16V
0603
C8
GND
SCL
SDA
GND
VDD
24LC128 EEPROM
SDA
1
SCL
2
Alert
3
GND
4A2 5
A1 6
A0 7
VDD 8
U5
MCP9808
VDD
GNDGND
SCL
SDA
TMP_ALERT
GND
0.1uF
16V
0603
C7
MCP9808 Temperature sensor
12
HDR-2.54 Male 1x2
J11
12
HDR-2.54 Female 1x2
J10
GND
TMP_ALERT
SCL
SDAANALOG_IN
2
1 3
10k
3386F
10%
R13
GND GND
VIN
1VOUT 2
VSS
3
U7
MCP1525VDD
0.1uF
16V
0603
C9
GND
1uF
10V
0603
C10
GND
12
HDR-2.54 Male 1x2
J18
MCP3221 ADC
VDD
1
VSS
2
AIN
3SDA 4
SCL 5
VDD
VSS
A
I
N
S
D
A
SCL
U9
MCP3221
12
HDR-2.54 Male 1x2
J8
12
HDR-2.54 Female 1x2
J7
GND
ANALOG_IN
VIN
1VOUT 2
VSS
3
U10
MCP1525VDD
0.1uF
16V
0603
C12
1uF
10V
0603
C13
SCL
SDA
DAC_OUT
GND
0.1uF
16V
0603
C11
VDD
GND
MCP4726 DAC
VOUT
1
VSS
2
VDD
3SDA 4
SCL 5
VREF 6
VOU
T
VSS
VDD
S
D
A
SCL
V
REF
U8
MCP4726
12
HDR-2.54 Male 1x2
J3
12
HDR-2.54 Female 1x2
J2
GND
DAC_OUT
GND GND
SCL
1
SDA
2
A2
3
A1
4
GP3 15
GP4 16
GP5 17
GP6 18
SCL
S
D
A
A2
A1
G
P
3
G
P4
G
P5
G
P6
A0
5
RESET
6
NC 7
INT
8
VSS
9
GP2 14
GP1 13
GP0 12
NC 11
NC 10
GP7 19
VDD
20
U11
MCP23008
SCL
SDA
0.1uF
16V
0603
C20
VDD
IO_INT
VDD
GREEN
LD4
GREEN
LD5
12
HDR-2.54 Male 1x2
J20
GND
GND
1k
0603
5%
R14
1k
0603
5%
R16
1k
0603
5%
R19
1k
0603
5%
R22
IO_GP0
IO_GP1
IO_GP2
IO_GP3
IO_GP4
IO_GP5
IO_GP6
IO_GP7
1234567 8
HDR-2.54 Male 1x8
J17
1234567 8
HDR-2.54 Female 1x8
J16
IO_GP0
IO_GP1
IO_GP2
IO_GP3
IO_GP4
IO_GP5
IO_GP6
IO_GP7
GND
MCP23008 GPIO Expander
GREEN
LD2
GREEN
LD3
GREEN
LD6
GREEN
LD7
GREEN
LD8
GREEN
LD9
1k
0603
5%
R12
1k
0603
5%
R15
1k
0603
5%
R18
1k
0603
5%
R20
MCP22 21 I
2
C Demonstration Board User’s Guide
DS50002480A-page 48 2016 Microchip Technology Inc.
A.4 BOARD – TOP SILK
A.5 BOARD – TOP COPPER AND SILK
Schematics and Layouts
2016 Microchip Technology Inc. DS50002480A-page 49
A.6 BOARD – TOP COPPER
A.7 BOARD – BOTTOM COPPER
MCP22 21 I
2
C Demonstration Board User’s Guide
DS50002480A-page 50 2016 Microchip Technology Inc.
A.8 BOARD – BOTTOM COPPER AND SILK
A.9 BOARD – BOTTOM SILK
MCP2221 I
2
C DEMONSTRATION
BOARD USER’S GUIDE
2016 Microchip Technology Inc. DS50002480A-page 51
Append ix B. Bill of Materi als (BOM)
TABLE B-1: BILL OF MATERIALS (BOM)
(1)
Qty Referen ce Desc ription Manufa cturer Part N um be r
15 C1, C3, C4, C5,
C6, C7, C8, C9,
C11, C12, C14,
C16, C18, C20,
C21
Cap. Ceramic, 0.1 µF, 16V, 10%, X7R SMD,
0603
AVX Corporation 0603YC104KAT2A
1 C2 Cap. Ceramic, 0.47 µF, 6.3V, 10%, X5R SMD,
0603
Murata Electronics
®
GRM188R60J474KA01D
3 C10, C13, C19 Cap. Ceramic, 1 µF, 10V, 20%, Y5V SMD, 0603 Murata Electronics GRM188F51A105ZA01D
2 C15, C17 Cap. Ceramic, 4.7 µF, 10V, 10%, X5R SMD,
0603
Taiyo Yuden Co., Ltd. LMK107BJ475KA-T
1 J1 Socket IC, Push, DIP 20, TH Mill-Max Mfg.
Corporation
110-99-320-41-001
4 J2, J7, J10, J13 Conn. Header-2.54, Female, 1x2, Gold, TH,
Vertical
Samtec, Inc. SSW-102-01-T-S
10 J3, J6, J8, J9,
J11, J14, J15,
J18, J20, J24
Conn. Header-2.54, Male, 1x2, Gold,
5.84 MH TH, Vertical
FCI 77311-118-02LF
2 J4, J21 Conn. USB Mini-B, Female, SMD, R/A Molex
®
0548190572
1 J5 Conn. DSUB DE-9, Female, TH, R/A Fuk Hing
Industries Co., Ltd
DR-9S
1 J12 Conn. Header-2.54, Male, 2x4, Tin,
5.84 MH TH, Vertical
FCI 67996-408HLF
1 J16 Conn. Header-2.54, Female, 1x8, Tin, TH,
Vertical
Sullins Connector
Solutions
PPTC081LFBN-RC
1 J17 Conn. Header-2.54, Male, 1x8, Gold,
5.84 MH TH
FCI 68001-108HLF
1 J19 Conn. Header-2.54, Male, 1x3, Gold,
5.84 MH TH, Vertical
FCI 68000-103HLF
1 J22 Conn. USB, USB-A, Female, SMD, R/A Assmann
Electronics Inc.
AU-Y1006-R
1 J23 Conn. Header-2.54, Male, 1x6, Gold,
5.84 MH TH, R/A
FCI 68016-106HLF
1 J25 Conn. Header-2.54, Female, 1x6, Gold, TH, R/A Sullins Connector
Solutions
PPPC061LGBN-RC
1 LD1 LED, RGB, 3.5x3.4 MM, 6PLCC Cree, Inc.
CLX6A-FKB-CJNN-
RFJBB7A363
8 LD2, LD3, LD4,
LD5, LD6, LD7,
LD8, LD9
Diode LED, Green, 2.2V, 25 mA, 15 mcd,
Clear, SMD, 0603
Kingbright Corp. APT1608SGC
Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM used
in manufacturing uses all RoHS-compliant components.
MCP22 21 I
2
C Demonstration Board User’s Guide
DS50002480A-page 52 2016 Microchip Technology Inc.
4PAD1, PAD2,
PAD3, PAD4
Mechanical HW, Rubber Pad,
Cylindrical, D12.7, H3.5, Gray
3M SJ-5012
1 PCB MCP2221 Printed Circuit Board — 04-10437-R2
2 R1, R2 Resistor TKF, 10k, 5%, 1/10W, SMD, 0603 Panasonic
®
ERJ-3GEYJ103V
3 R3, R4, R5 Resistor TF, 10k, 1%, 1/8W, SMD, 0603 Vishay
Intertechnology, Inc.
MCT06030C1002FP500
1 R6 Resistor TKF, 470k, 1%, 1/10W, SMD, 0603 Vishay
Intertechnology, Inc.
CRCW0603470KFKEA
1 R7 Resistor TKF, 1.5k, 5%, 1/10W, SMD, 0603 Panasonic ERJ-3GEYJ152V
1 R8 Resistor TKF, 3.3k, 5%, 1/10W, SMD, 0603 Panasonic ERJ-3GSYJ332V
1 R9 Resistor TKF, 3.3k, 5%, 1/10W, SMD, 0603 Panasonic ERJ-3GSYJ272V
2 R10, R11 Resistor TKF, 4.7k, 5%, 1/10W, SMD, 0603 Yageo Corporation RC0603JR-074K7L
8 R12, R14, R15,
R16, R18, R19,
R20, R22
Resistor TKF, 1k, 5%, 1/10W, SMD, 0603 Panasonic ERJ-3GEYJ102V
1 R13 Resistor Trimmer Cermet, 10k, 10%, 500 m,
TH, 3386F
Bourns
®
, Inc. 3386F-1-103TLF
1 R17 Resistor Ceramic, 0.025R, 1%, 2W, SMD, 2512 TT Electronics Plc. LRF2512-R025FW
1 R21 Resistor TKF, 20k, 5%, 1/10W, SMD, 0603 Yageo Corporation RC0603JR-0720KL
8 TP1, TP2, TP3,
TP4, TP5, TP6,
TP7, TP8
Misc, Test Point, Multi-Purpose, Mini, Black Keystone
Electronics Corp.
5001
1 U1 In-Circuit Transceiver, MAX3232, SSOP-16 Texas Instruments MAX3232CDBR
1 U2 Microchip Analog LDO, 3.3V,
MCP1825ST-3302E/DB, SOT-223-3
Microchip
Technology Inc
MCP1825S-3302E/DB
1 U3 Microchip Interface, USB, I
2
C, UART,
MCP2221-I/ST, TSSOP-14
Microchip
Technology Inc
MCP2221-I/ST
1 U4 Microchip Memory Serial EEPROM, 128k, I
2
C,
24LC128-I/SN, SOIC-8
Microchip
Technology Inc
24LC128T-I/SN
1 U5 Microchip Analog Temperature Sensor,
-40°C to +125°C, MCP9808-E/MS, MSOP-8
Microchip
Technology Inc
MCP9808-E/MS
1 U6 Microchip Analog Current Sense Monitor,
PAC1710-1-AIA-TR, DFN-10
Microchip
Technology Inc
PAC1710-1-AIA-TR
2 U7, U10 Microchip Analog V
REF
, 2.5V, MCP1525-I/TTG,
SOT-23-3
Microchip
Technology Inc
MCP1525T-I/TT
1 U8 Microchip Analog DAC, 1-Ch, 12-Bit,
MCP4726A0T-E/CH, SOT-23-6
Microchip
Technology Inc
MCP4726A0T-E/CH
1 U9 Microchip Analog ADC-SAR, 12-Bit,
MCP3221A5T-E/OT, SOT-23-5
Microchip
Technology Inc
MCP3221A5T-E/OT
1 U11 Microchip Interface GPIO-Port, Expand, I
2
C,
8-Port, MCP23008T-E/SS, SSOP-20
Microchip
Technology Inc
MCP23008T-E/SS
TABLE B-1: BILL OF MATERIALS (BOM)
(1)
(CONTINUED)
Qty Referen ce Desc r ipti on M anufactur er Pa rt N um be r
Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM used
in manufacturing uses all RoHS-compliant components.
Bill of Material s (BOM)
2016 Microchip Technology Inc. DS50002480A-page 53
TABLE B-2: BILL OF MATERIALS (BOM) - MECHANICAL PARTS
(1)
Qty Reference Description Manufacturer Part Number
1 CBL1, CBL2 Mech. HW Cable, USB-A Male to USB
Mini-B Male, 3 ft, Black
Katerno 10UM-02103BK
2 JP6, JP9, JP12a,
JP12b, JP14, JP18,
JP19, JP20, JP24
Mech. HW Jumper, 2.54 mm, 1x2,
Handle, Gold
TE Connectivity,
Ltd.
881545-2
Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM
used in manufacturing uses all RoHS-compliant components.
DS50002480A-page 54 2016 Microchip Technology Inc.
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