PM4341AT1XC
DATA SHEET
PMC-900602
ISSUE 7
T1 FRAMER/TRANSCEIVER
Register 47H: XIBC Loopback Code
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
IBC7
IBC6
IBC5
IBC4
IBC3
IBC2
IBC1
IBC0
X
X
X
X
X
X
X
X
This register contains the inband loopback code pattern to be transmitted.The
code is transmitted most significant bit ( IBC7) first, followed by IBC6 and so on.
The code, regardless of the length, must be aligned with the MSB always in the
IBC7 position (e.g., a 5-bit code would occupy the IBC7 through IBC2 bit
positions). To transmit a 3-bit or a 4-bit code pattern, the pattern must be paired
to form a double-sized code (i.e., the 3-bit code '011' would be written as the 6-
bit code '011011').
When the T1XC is reset, the contents of this register are not affected.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
165
PMC [ PMC-SIERRA, INC ]
