W6691CD WINBOND [Winbond], W6691CD Datasheet - Page 27

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

F5 Identifying Input
identification of INFO 2 or INFO 4. This state is reached at most 50 s after a signal different from INFO 0 is
present at the receiver of the S interface.
F6 Synchronized
(INFO 4). This state is reached at most 6 ms after an INFO 2 arrives at the S interface (in case the clocks
were disabled in "F3 Deactivated without clock").
F7 Activated
Synchronized" , state F7 is reached at most 0.5 ms after reception of INFO 4. From state "F3 Deactivated
without clock" with the clocks disabled, state F7 is reached at most 6 ms after the W6691 is directly activated
by INFO 4.
F8 Lost Framing
2 or INFO 4 or deactivation by INFO 0.
Special States:
Analog Loop Initiated
0 is sent to the line). The receiver is not yet synchronized.
Analog Loop Activated
'TI" or "ATI" is sent depending on whether or not a signal different from INFO 0 is detected on the S interface.
Send Continuous Pulses
After the receipt of any non-INFO 0 signal from NT, the W6691 ceases to transmit INFO 1 and awaits
When W6691 receives an activation signal (INFO 2), it responds with INFO 3 and waits for normal frames
This is the normal active state with the layer 1 protocol activated in both directions. From state "F6
This is the state where the W6691 has lost frame synchronization and is awaiting resynchronization by INFO
On Enable Analog Loop command, INFO 3 is sent by the line transmitter internally to the line receiver (INFO
The receiver is synchronized on INFO 3 which is looped back internally from the transmitter. The indication
A 96 kHz continuous pulse with alternating polarities is sent.
27
Preliminary W6691
Publication Release Date: Sep 2001
Revision 1.1