STR710F datasheet(11/49 Pages) STMICROELECTRONICS

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STR71xF - INTRODUCTION

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Legend / Abbreviations for Table 3:

Type:

I = input, O = output, S = supply, HiZ= high impedance,

In/Output level: C = CMOS 0.3VDD/0.7VDD

CT= CMOS 0.8V / 2V with input trigger

TT= TTL 0.3VDD/0.7VDD with input trigger

C/T = Programmable levels: CMOS 0.3VDD/0.7VDD or TTL 0.8V / 2V

Port and control configuration:

– Input:

pu/pd= software enabled internal pull-up or pull down

pu= in reset state, the internal 100k

Ω weak pull-up is enabled.

pd = in reset state, the internal 100k

Ω weak pull-down is enabled.

– Output:

OD = open drain (logic level)

PP = push-pull

T = true OD, (P-Buffer and protection diode to VDD not implemented), 5V tolerant.

Table 3. STR710 Pin Description

Pin n°

Pin Name

Input

Output

Main

function

(after

reset)

Alternate function

1A1

P0.10/U1.RX/

U1.TX/

SC.DATA

I/O pd CT X4mA T

Port

0.10

UART1: Receive

Data input

UART1: Transmit data

output.

Note: This pin may be used for Smartcard

DataIn/DataOut or single wire UART (half du-

plex) if programmed as Alternate Function

Output. The pin will be tri-stated except when

UART transmission is in progress

2B2

External Memory Interface: Active low read signal for

external memory. It maps to the OE_N input of the ex-

ternal components.

3C2

P0.11/

BOOT.1/

U1.TX

I/O pd CT

4mA X

Port

0.11

Select Boot Con-

figuration input

UART1: Transmit data

output.

P0.12/SC.CLK

I/O pd CT

4mA

Port

0.12

Smartcard reference clock output

5D1

VSS

Ground voltage for digital I/Os

6D2

V33

Supply voltage for digital I/Os

P2.0/CS.0

I/O pu CT

8mA X

Port 2.0

External Memory Interface: Select Memory

Bank 0 output

Note: This pin is forced to output mode at re-

set to allow boot from external memory

P2.1/CS.1

I/O

8mA X

Port 2.1

External Memory Interface: Select Memory

Bank 1 output

9D3

P0.13/U2.RX/

T2.OCMPA

I/O pu CT X4mA X

Port

0.13

UART2: Receive

Data input

Timer2: Output Compare

A output

P0.14/U2.TX/

T2.ICAPA

I/O pu CT

4mA X

Port

0.14

UART2: Transmit

data output

Timer2: Input Capture A

input

P2.2/CS.2

I/O

8mA X

Port 2.2

External Memory Interface: Select Memory

Bank 3 output

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