PEB24901HV12 Lantiq, PEB24901HV12 Datasheet - Page 46

• Manufacturer Part Number: PEB24901HV12
• Manufacturer: Lantiq

Specifications of PEB24901HV12

• Lead Free Status / Rohs Status: Supplier Unconfirmed

3.4.1.5
Figure 22
Deactivation of Uk0 Link, always Initiated by LT
3.4.2 IOM-2 Control Information in the C/I-Channel
The control information in the C/I-channel depends on the state of activation. Each code
in the C/I-channel is repeated in each IOM frame until a change is necessary. In the layer
2 device ( PEB 20550 ELIC), the code is changed by the controlling processor which
overwrites a special register with a new code. In the layer 1 transceiver, like the PEB
24901/24902 Quad IEC-T, a change of C/I-channel code is the result of a detected
signal element on the line or a time-out during (de-)activation.
To detect a change in the C/I-channel, the new code must be found in two successive
IOM frames to be considered valid (double last look criterion). If the receiving device
accepts the new code, it results in a new line signal or in closing a loop directly in the
device. A layer 2 device then gives an interrupt request to the processor to hand over the
new control information.
Semiconductor Group
SBC/ICC
IOM
Procedure for Deactivation
DIU
DID
DR
3.1
3.2
3.2
NT
R
IEC
Downstream
INFO
INFO U0
U Line
k0
3.2
3.1
0 U
IEC
Repeater
IOM
(may be omitted)
DID
DIU
DR
3.1
DA
3.1
3.2
3.2
45
R
IEC
INFO U0
INFO U0
U Line
k0
3.2
3.1
Upstream
IEC-DFE-T
IOM -2
PEB 24901
DIU
DID
DR
DA
3.1
3.1
3.2
3.2
LT
R
ITD06397
ELIC
02.95
R