S/UNI®-8x155 ASSP Telecom Standard Product Data Sheet
Released
Register 0x043, 0x143, 0x243, 0x343, 0x443, 0x543, 0x643, 0x743:
TPOP Current Pointer LSB
Bit
Type
R
R
R
R
R
R
R
R
Function
CPTR[7]
CPTR[6]
CPTR[5]
CPTR[4]
CPTR[3]
CPTR[2]
CPTR[1]
CPTR[0]
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
X
X
X
X
X
X
X
X
Register 0x044, 0x144, 0x244, 0x344, 0x444, 0x544, 0x644, 0x744:
TPOP Current Pointer MSB
Bit
Type
Function
Unused
Unused
Unused
Unused
Unused
Unused
CPTR[9]
CPTR[8]
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
X
X
X
X
X
X
X
X
R
R
CPTR[9:0]:
The CPTR[9:0] bits reflect the value of the current payload pointer being inserted in the
outgoing stream. The value may be changed by loading a new pointer value using the
TPOP Arbitrary Pointer LSB and MSB Registers, or by inserting positive and negative
pointer movements using the PSE and NSE register bits.
It is recommended the CPTR[9:0] value be software debounced to ensure a correct value is
received.
Configuring the APS interface (setting PROCM high or TXEN high) while the pointer value
is 522, will cause downstream logic to improperly process the SONET stream. In general, a
downstream loss of pointer (LOP) and/or line BIP errors will occur.
A pointer value of 522 can be used if the APS connection is configured (either created or
removed) first with TPOP set to a non-522 value. After the APS link configuration, the
pointer value can be configured to 522.
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC- 2010299, Issue 2
194
PMC [ PMC-SIERRA, INC ]
