PEB24901HV12 Lantiq, PEB24901HV12 Datasheet - Page 57

• Manufacturer Part Number: PEB24901HV12
• Manufacturer: Lantiq

Specifications of PEB24901HV12

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Semiconductor Group
Synchronizing
Start awaking Uk0
Uk0 synch. no TE?
Wait 1 ms
After successful awake procedure, the IEC tries to recognize
INFO U1, U2 or U3 (mode dependent). The user data
(B + B + D) on pin DOUT is clamped to high.
Receiving ARU or ARD in the C/I-channel, the IEC has
powered up and is sending the awake signal. The user data
(B + B + D) on pin DOUT is clamped to high .
The Quad IEC DFE-T in the exchange has recognized INFO
U2, so 1,152 subsequent bits have been transferred without
any bit error. This is an indication for synchronization of Uk0,
but no terminal equipment has announced its presence yet.
The Quad IEC DFE-T is now ready to go to the transparent
state, if a TE was connected. From this state of activation, the
RDS counter and the adaption of receiver coefficients are
enabled until deactivation is performed.
In case of an analog loop, the Quad IEC DFE-T leaves this
state again at once. If no loop should be closed, the Quad IEC
DFE-T waits for INFO U3 indicating that at least one TE is at
the end of the link or for deactivation. If in 64 subsequent Uk0
frames the Barker-code is not found at the expected position,
the Quad IEC DFE-T gives out RSYD or RSYU on the C/I-
channel until it has resynchronized finding the Barker-code on
the same position in 4 subsequent frames.
Before indicating to the layer 2 device that the transparent state
has been reached, the Quad IEC DFE-T in the exchange waits
1 ms to be sure that the whole link is already transparent
upstream too. The user data (B + B + D) on pin DOUT is
clamped to high . If in 64 subsequent Uk0 frames the Barker-
code is not found at the expected position, the Quad IEC DFE-
T gives out RSYD or RSYU on the C/I-channel until it has
resynchronized finding the Barker-code on the same position in
4 subsequent frames.
56
PEB 24901
02.95