PRELIMINARY
PM4318 OCTLIU
DATASHEET
PMC- 2001578
ISSUE 3
OCTAL E1/T1/J1 LINE INTERFACE DEVICE
Register 31BH – 322H: INSBI Page B Octant to Tributary Mapping #1 - #8
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Unused
SPE[1]
SPE[0]
TRIB[4]
TRIB[3]
TRIB[2]
TRIB[1]
TRIB[0]
X
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
SPE[1:0] and TRIB[4:0]:
The SPE[1:0] and TRIB[4:0] fields are used to specify the LIU octant data stream to SBI
tributary mapping when APAGE is set to 1. The output of the octant corresponding to the
register (1-8) is mapped to the SPE and tributary specified by the value of SPE[1:0] and
TRIB[4:0]. Valid values of SPE[1:0] are from 1 to 3. Valid values of TRIB[4:0] are from 1 to
28 in T1 mode and from 1 to 21 in E1 mode.
Note: The mapping of more than one tributary to the same LIU octant data stream or more
than one LIU octant data stream to the same tributary is not allowed. Special care must be
taken to ensure that all LIU octants and tributaries are uniquely mapped when using multiple
OCTLIU’s on the same SBI bus. Failure to do so will result in bus contention.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
86
PMC [ PMC-SIERRA, INC ]
