ST7SCR1R4 - STMicroelectronics, Inc.

Rev. 1.2

December 2001 1/10

This ispreliminary information on a new product indevelopment or undergoing evaluation. Details aresubject to change without notice.

ST7SCR

8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K

FLASH, 768 RAM, SMARTCARD I/F, TIMER

DATA BRIEFING

■Memories

– Up to 16K of ROM or High Density Flash (HD-

Flash) program memory with read/write pro-

tection

– HDFlash In-Circuit and In-Application Pro-

gramming

– Up to 768 bytes of RAM including up to 128

bytes stack and 256 bytes USB buffer

■Clock, Reset and Supply Management

– Low Voltage Reset

– 2 power saving modes: Halt and Wait modes

– PLL for generating 48 MHz USB clock using a

4 MHz crystal

■Interrupt Management

– Nested Interrupt Controller

■USB (Universal Serial Bus) Interface

– 256-byte buffer for full speed bulk,control and

interrupt transfer types compliant with USB

specification (version 2.0)

– On-Chip 3.3V USB voltage regulator and

transceivers with software power-down

– 7 USB Endpoints:

One 8-byte Bidirectional Control Endpoint

One 64-byte In Endpoint,

One 64-byte Out Endpoint

Four 8-byte In Endpoints

■35 or 4 I/O ports:

– Up to 4 LED outputs with software program-

mable constant current (3 or 7 mA).

– 2 General purpose I/Os programmable as in-

terrupts

– Upto 8 line inputs programmable as interrupts

– Up to 20 Outputs

– 1 line assigned by default as static input after

reset

■ISO7816-3 UART Interface:

– 4 Mhz Clock generation

– Synchronous/Asynchronous protocols (T=0,

T=1)

– Automatic retry on parity error

– Programmable Baud rate from 372 clockpuls-

es up to 11.625 clock pulses (D=32/F=372)

– Card Insertion/Removal Detection

■Smartcard Power Supply:

– Selectable card VCC 1.8V, 3V, and 5V

– Internal Step-up converter for 5V supplied

Smartcards (with a current of up to 55mA) us-

ing only two external components.

– Programmable Smartcard Internal Voltage

Regulator(1.8V to 3.0V) with current overload

protection and 4 KV ESD protection (Human

Body Model) for all Smartcard Interface I/Os

■One 8-bit Timer

– Time Base Unit (TBU) for generating periodic

interrupts.

■Development Tools

– Full hardware/software development package

Table 1. Device Summary

TQFP64 14x14 SO24

Features ST7FSCRDIE ST7SCRDIE ST7FSCR1R4 ST7SCR1R4 ST7FSCR1E4 ST7SCR1E4

Program memory 16K FLASH 16K ROM 16K FLASH 16K ROM 16K FLASH 16K ROM

User RAM (stack) - bytes 768 (256)

Peripherals USB Full-Speed (7 Ep), TBU, Watchdog timer, ISO7816-3 Interface

Operating Supply 4.0 to 5.5V

Package DIE TQFP64 SO24

CPU Frequency 4 or 8 Mhz

Operating temperature 0°C to +70°C

ST7SCR

2/10

1 INTRODUCTION

The ST7SCR and ST7FSCR devices are mem-

bers ofthe ST7 microcontroller family designed for

USB applications. All devices are based on a com-

mon industry-standard 8-bit core, featuring an en-

hanced instruction set.

The ST7SCR ROM devices are factory-pro-

grammed and are not reprogrammable.

The ST7FSCR versions feature dual-voltage

Flash memory with Flash Programming capability.

They operate at a 4MHz external oscillator fre-

quency.

Under software control, all devices can be placed

in WAIT orHALT mode, reducingpower consump-

tion when the application is in idle or stand-by

state.

The enhanced instruction set and addressing

modes of the ST7 offer both power and flexibility to

software developers, enabling the design of highly

efficient and compact application code. In addition

to standard 8-bit data management, all ST7 micro-

controllers feature true bit manipulation, 8x8 un-

signed multiplication and indirect addressing

modes.

The devices include an ST7 Core,up to 16 Kbytes

of program memory, up to512 bytes of user RAM,

up to 35 I/O lines and the following on-chip periph-

erals:

– USB full speed interface with 7 endpoints, pro-

grammable in/out configuration and embedded

3.3V voltage regulator and transceivers (no ex-

ternal components are needed).

– ISO7816-3 UART interface with Programmable

Baud rate from 372 clock pulses up to 11.625

clock pulses

– Smartcard Supply Block able to provide pro-

grammable supply voltage andI/O voltage levels

to the smartcards

– Low voltage reset ensuring proper power-on or

power-off of the device (selectable by option)

– Watchdog Timer

– 8-bit Timer (TBU)

ST7SCR

3/10

Figure 1. ST7SCR Block Diagram

8-BIT CORE

ALU

ADDRESSAND DATA BUS

OSCIN

OSCOUT

PA6

4MHz

CONTROL

RAM

(512 Bytes)

PROGRAM

(16K Bytes)

MEMORY

8-BIT TIMER

LVD

VPP

USBDP

USBDM

USBVCC

PORT C PC[7:0]

PB[7:0]

PA[5:0]

SUPPLY

MANAGER

PLL

OSCILLATOR

USB

PORT B

PORT A

USB

DATA

BUFFER

(256 bytes)

DIVIDER 8 MHz

3V/1.8V Vreg

DC/DC

CRDDET

CRDIO

CRDC4

CRDC8

CRDRST

CRDCLK

PD[7:0]

ISO7816 UART

PORT D

Converter CRDVCC

SELF

WATCHDOG

LED LED[3:0]

or 4 MHz

48 MHz

DIODE

ST7SCR

4/10

2 PIN DESCRIPTION

Figure 2. 64-Pin TQFP Package Pinout

WAKUP2/PA2

WAKUP2/PA3

PD0

PD1

PD2

PD3

PD4

PD5

PD6

PD7

OSCIN

OSCOUT

CRDDET

VDD

WAKUP2/ICCDATA/PA0

WAKUP2/ICCCLK/PA1

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

17 18 19 20 21 22 23 24 29 30 31 3225 26 27 28

CRDIO

GND

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

CRDCLK

NC PA6

VPP

PC7/WAKUP1

PC6/WAKUP1

PC5/WAKUP1

PC4/WAKUP1

PC3/WAKUP1

PC2/WAKUP1

PC1/WAKUP1

PC0/WAKUP1

GND

VDD

LED0

SELF1

SELF2

PA5

PA4

LED3

LED2

LED1

VDD

VDDA

USBVcc

CRDVCC

GND

GNDA

DIODE

CRDRST

NC = Not Connected

ST7SCR

5/10

PIN DESCRIPTION (Cont’d)

Figure 3. 24-Pin SO Package Pinout

18 LED0

USBVcc

OSCIN

OSCOUT

VPP

DIODE

CRDCLK

CRDRST

CRDVCC

PA6

CRDIO

CRDDET

ICCDATA/WAKUP2/PA0

VDDA

GNDA

ICCCLK/WAKUP2/PA1 NC

GND 21

24 VDD

SELF

ST7SCR

6/10

PIN DESCRIPTION (Cont’d)

Legend / Abbreviations:

Type: I = input, O = output, S = supply

In/Output level: CT= CMOS 0.3VDD/0.7VDD with

input trigger

Output level: HS = 10mA high sink (on N-buffer

only)

Port and control configuration:

– Input:float = floating,wpu= weakpull-up, int= in-

terrupt, ana = analog

– Output:OD=opendrain,T = true opendrain, PP

= push-pull

Table 1. Pin Description

Pin n°

Pin Name

Type

Level

VCARD supplied

Port / Control

Main

Function

(after reset) Alternate Function

TQFP64

SO24

Input

Output

Input Output

wpu

int

1 5 CRDRST O CTX X Smartcard Reset

2 NC Not Connected

3 6 CRDCLK O CTX X Smartcard Clock

4 NC Not Connected

57C4 O C

TX X Smartcard C4

6 8 CRDIO I/O CTX X X Smartcard I/O

79C8 O C

TX X Smartcard C8

8 3 GND S Ground

9 PB0 O CTX X Port B0 1)

10 PB1 O CTX X Port B1 1)

11 PB2 O CTX X Port B2 1)

12 PB3 O CTX X Port B3 1)

13 PB4 O CTX X Port B4 1)

14 PB5 O CTX X Port B5 1)

15 PB6 O CTX X Port B6 1)

16 PB7 O CTX X Port B7 1)

17 10 CRDDET I CTX Smartcard Detection

18 VDD S Power Supply voltage 4V-5.5V

19 11 PA0/WAKUP2/

ICCDATA I/O CTX X X X Port A0 Interrupt, In-CircuitCommunication

Data Input

20 12 PA1/WAKUP2/

ICCCLK I/O CTX X X X Port A1 Interrupt, In-CircuitCommunication

Clock Input

21 PA2/WAKUP2 I/O CTX X X X Port A2 1) Interrupt

22 PA3/WAKUP2 I/O CTX X X X Port A3 1) Interrupt

23 PD0 O CTX X Port D0 1)

24 PD1 O CTX X Port D1 1)

ST7SCR

7/10

25 PD2 O CTX X Port D2 1)

26 PD3 O CTX X Port D3 1)

27 PD4 O CTX X Port D4 1)

28 PD5 O CTX X Port D5 1)

29 PD6 O CTX X Port D6 1)

30 PD7 O CTX X Port D7 1)

31 14 OSCIN CTInput/Output Oscillator pins. These pins connect a

4MHz parallel-resonant crystal, or an external source

to the on-chip oscillator.

32 15 OSCOUT CT

33 VDD S Power Supply voltage 4V-5.5V

34 GND S Ground

35 PC0/WAKUP1 I CTX X PC0 1) External interrupt

36 PC1/WAKUP1 I CTX X PC1 1) External interrupt

37 PC2/WAKUP1 I CTX X PC2 1) External interrupt

38 PC3/WAKUP1 I CTX X PC3 1) External interrupt

39 PC4/WAKUP1 I CTX X PC4 1) External interrupt

40 PC5/WAKUP1 I CTX X PC5 1) External interrupt

41 PC6/WAKUP1 I CTX X PC6 1) External interrupt

42 PC7/WAKUP1 I CTX X PC7 1) External interrupt

43 16 VPP SFlash programming voltage. Must be held low innor-

mal operating mode.

44 17 PA6 I CTPA6

45 18 LED0 O HS X Constant Current Output

46 19 DM I/O CTUSB Data Minus line

47 20 DP I/O CTUSB Data Plus line

48 NC Not Connected

49 21 USBVCC O CT3.3 V Output for USB

50 22 VDDA S power Supply voltage 4V-5.5V

51 23 VDD S power Supply voltage 4V-5.5V

52 LED1 O HS X Constant Current Output

53 LED2 O HS X Constant Current Output

54 LED3 O HS X Constant Current Output

55 NC Not Connected

56 NC Not Connected

Pin n°

Pin Name

Type

Level

VCARD supplied

Port / Control

Main

Function

(after reset) Alternate Function

TQFP64

SO24

Input

Output

Input Output

wpu

int

ST7SCR

8/10

Note 1: Keyboard interface

57 PA4 I/O CTX X X X Port A4

58 PA5 I/O CTX X X X Port A5

59 24 SELF2 O CTAn External inductance must be connected to these

pins for the step up converter

60 24 SELF1 O CT

61 1 DIODE S CTAn External diode must be connected to this pin for

the step up converter

62 2 GNDA S Ground

63 3 GND S

64 4 CDRVCC O CTX Smartcard Supply pin

Pin n°

Pin Name

Type

Level

VCARD supplied

Port / Control

Main

Function

(after reset) Alternate Function

TQFP64

SO24

Input

Output

Input Output

wpu

int

ST7SCR

9/10

3 PACKAGE CHARACTERISTICS

3.1 PACKAGE MECHANICAL DATA

Figure 4. 64-Pin Plastic Quad Flat Package

Figure 5. 24-Pin Plastic Small Outline Package, 300-mil Width

Dim. mm inches

Min Typ Max Min Typ Max

A3.40 0.134

A1 0.25 0.50 0.010 0.020

A2 2.50 2.70 2.90 0.098 0.106 0.114

b0.29 0.45 0.011 0.018

c0.11 0.23 0.004 0.009

D17.20 0.677

D1 14.00 0.551

D2 12.00 0.472

E17.20 0.677

E1 14.00 0.551

E2 12.00 0.472

e0.80 0.031

L0.73 0.88 1.03 0.029 0.035 0.041

Number of Pins

N64

0×-7×

1.60mm c

EE1E2

0×-7×

1.60mm c

0×-7×

1.60mm c

Dim. mm inches

Min Typ Max Min Typ Max

A2.35 2.65 0.093 0.104

A1 0.10 0.30 0.004 0.012

B0.33 0.51 0.013 0.020

C0.23 0.32 0.009 0.013

D15.20 15.60 0.599 0.614

E7.40 7.60 0.291 0.299

e1.27 0.050

H10.00 10.65 0.394 0.419

h0.25 0.75 0.010 0.030

α0°8°0°8°

L0.40 1.27 0.016 0.050

Number of Pins

N24

Dim. mm inches

Min Typ Max Min Typ Max

Jedec Ref. MS-

hx45×

ST7SCR

10/10

Notes:

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of useof such information nor forany infringement ofpatents or other rights of third parties which may result from itsuse. No license isgranted

by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject

to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not

authorized for use as critical components in life support devices or systems without the express written approval of STMicroelectronics.

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