W6691CD WINBOND [Winbond], W6691CD Datasheet - Page 32

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

7.2.4 Layer 1 Activation /Deactivation in LT-S Mode
7.2.4.1 States Descriptions and Command/Indication Codes in LT-S Mode
G1 Deactivated
No any signal is detected on S interface and No any activation command is received in the C/I channel.
G2 Pending Activation
IF INFO1 IS DETECTED ON S INTERFACE OR AN ARD COMMAND IS RECEIVED FROM LAYER2 ,THE
W6691 START TO
INTERFACE. INFO2 IS SENT FROM W6691.
G3 ACTIVATED
THIS STATE.
INSTEAD OF INFO4 AND WAIT FOR RECEIVING INFO3 TO GET SYNCHRONIZATION AGAIN.
G4 PENDING DEACTIVATION
expiration, the layer1 responses DRIU indication for
Layer2.
G4 Await Deactivated
layer2, it enters G1 state.
Test Mode Continuous Pulses
Continuous alternating 96 KHz pulses are sent.
Test Mode Single Pulses
W6691 RECEIVES INFO3 ,THEN, IT ENTERS G3 ACTIVATED STATE. THE INFO4 IS TRANSMITTED IN
This state is requested by DDR (deactivate request). If INFO0 is received during 16ms or an internal timer2
The W6691 stays in this state and waits for DRIU report from layer2. If W6691 receives DRA command from
WHEN THE SYNCHRONIZATION IS LOST, W6691 SWITCH TO TRANSMIT INFO2
TRANSMIT INFO2. W6691 IS WAITING FOR RECEIVING INFO3 FROM S
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Preliminary W6691
Publication Release Date: Sep 2001
Revision 1.1