W6691 Просмотр технического описания (PDF) - Winbond

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Компоненты Описание

производитель

W6691

ISDN S/T Interface Transceiver

Winbond 

Preliminary W6691

SX2

46

XTAL1

40

XTAL2

41

TESTP 2

TOUT2 38

OSC768 8

M0

31

M1

32

ACTL1S 7

O S/T bus transmitter output (negative).

I

Crystal or Oscillator clock input. The clock frequency:

7.68MHz±100PPM.

O Crystal clock output. Left unconnected when using oscillator.

Functional Test

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Used to enable normal operation (1) or enter test mode (0).

Timer2 Expiration Output

O Timer 2 output. A square wave with 50 % duty cycle, 1~63 ms

period can be generated.

Clock Pulse

O It provides output 7.68MHz clock. It does not synchronize to S

interface.

Operating Mode

I

Setting of operating mode

I

Setting of operating mode

Peripheral Input Port and Output Port

O Activate Layer1 Status.This pin can be pulled to low level or

programmed by microprocessor by ACTL2 : ACTL1S when Layer1

operates in activate.

VDD

VDDA

VSS

VSSA

5, 22, 36, 49, 58

44

6, 21, 35, 50, 59

41

ACTL2 : ACTL1S:

0: When Layer 1 operates in activate state, ACTL1S pin is pulled

to low level. In contrast, if Layer 1 operates in deactivate state,

ACTL1S pin is driven to high level.

1: The ACTL1 output level is programmed by microprocessor

(ACTL2 : ACLT1S).

Power and Ground

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Digital Power Supply (3V±5%).

I

Analog Power Supply (3V±5%).

I

Digital Ground.

I

Analog Ground.

Publication Release Date: Sep 2001

15

Revision 1.1

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