peb2255 Infineon Technologies Corporation, peb2255 Datasheet - Page 220

• Manufacturer Part Number: peb2255
• Description: E1/t1/j1 Framer And Line Interface Component For Long And Short Haul Applications
• Manufacturer: Infineon Technologies Corporation

LLBP…
Loop Code Register 2 (Read/Write)
Value after RESET: 00
LDC7…0…
Loop Code Register 3 (Read/Write)
Value after RESET: 00
LAC7…0…
Data Sheet
LCR2
LCR3
LDC7
LAC7
7
7
LCR1.XPRBS=0
0…
1…
LCR1.XPRBS=1 or LCR1.EPRM = 1
0…
1…
If enabled by bit FMR3.XLD the LLB deactivate code is repeated
automatically until the LLB generator is stopped. Transmit data is
overwritten by the LLB code. LDC0 is transmitted last. If the selected
code length is less than 8 bit, the leftmost bits of LCR2 are ignored.
For correct operations bit LCR1.XPRBS has to be cleared.
Line Loopback Activate Code
If enabled by bit FMR3.XLU the LLB activate code is repeated
automatically until the LLB generator is stopped. Transmit data is
overwritten by the LLB code. LAC0 is transmitted last. If the selected
code length is less than 8 bit, the leftmost bits of LCR3 are ignored.
For correct operations bit LCR1.XPRBS has to be cleared.
Line Loopback Pattern
Line Loopback Deactivate Code
H
H
Fixed line loopback code : 001 (loop down) or 00001 (loop up).
Enable user programmable line loopback code via register
LCR2/3.
2
2
15
20
-1
-1
220
FALC-LH V1.3
LDC0
LAC0
E1 Registers
0
0
PEB 2255
2000-07
(3A)
(3B)