W6691CD WINBOND [Winbond], W6691CD Datasheet - Page 15

• Manufacturer Part Number: W6691CD
• Description: ISDN S/T Interface Transceiver
• Manufacturer: WINBOND [Winbond]

SX2
XTAL1
XTAL2
TESTP
TOUT2
OSC768
M0
M1
ACTL1S
VDD
VDDA
VSS
VSSA
46
40
41
2
38
8
31
32
7
5, 22, 36, 49, 58
44
6, 21, 35, 50, 59
41
Peripheral Input Port and Output Port
O
O
O
O
O
I
I
I
I
I
I
I
I
Timer2 Expiration Output
S/T bus transmitter output (negative).
Crystal
7.68MHz 100PPM.
Crystal clock output. Left unconnected when using oscillator.
Used to enable normal operation (1) or enter test mode (0).
Timer 2 output. A square wave with 50 % duty cycle, 1~63 ms
period can be generated.
It provides output 7.68MHz clock. It does not synchronize to S
interface.
Setting of operating mode
Setting of operating mode
Activate Layer1 Status.This pin can be pulled to low level or
programmed by microprocessor by ACTL2 : ACTL1S when Layer1
operates in activate.
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).
Digital Power Supply (3V 5%).
Analog Power Supply (3V 5%).
Digital Ground.
Analog Ground.
Power and Ground
Functional Test
Operating Mode
Clock Pulse
or
15
Oscillator
clock
Preliminary W6691
input.
Publication Release Date: Sep 2001
The
clock
Revision 1.1
frequency: