
PM5317 SPECTRA-9953 Telecom Standard Product Data Sheet
Release
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000741, Issue 5
435
Indirect Register 00H: SHPI Pointer Interpreter Configuration
Bit
Type
Function
Default
Bit 15
Unused
X
Bit 14
Unused
X
Bit 13
Unused
X
Bit 12
Unused
X
Bit 11
Unused
X
Bit 10
Unused
X
Bit 9
Unused
X
Bit 8
Unused
X
Bit 7
R/W
Unused
0
Bit 6
R/W
Unused
0
Bit 5
R/W
NDFCNT
0
Bit 4
R/W
Reserved
0*
Bit 3
R/W
RELAYPAIS
0
Bit 2
R/W
JUST3DIS
0
Bit 1
R/W
SSEN
0
Bit 0
Unused
X
The Pointer Interpreter Configuration Indirect Register is provided at SHPI r/w indirect address
00H.
*Bit #4 defaults to 0 but should be written to 1 in order to ensure compliant device operation.
This is explained further in Section 14.2.2.
SSEN
The SS bits enable (SSEN) bit selects whether or not the SS bits are taking into account in
the pointer interpreter state machine. When SSEN is set to logic 1, the SS bits must be set
to 10 for a valid NORM_POINT, NDF_ENABLE, INC_IND, DEC_IND or NEW_POINT
indication. When SSEN is set to logic 0, the SS bits are ignored.
JUST3DIS
The “justification more than 3 frames ago disable” (JUST3DIS) bit selects whether or not
the INC_IND or DEC_IND pointer justifications must be more than 3 frames apart to be
considered valid. When JUST3DIS is set to logic 0, the previous NDF_ENABLE,
INC_IND or DEC_IND indication must be more than 3 frames ago or the present
INC_IND or DEC_IND indication is considered an INV_POINT indication.
NDF_ENABLE indications can be every frame regardless of the JUST3DIS bit. When
JUST3DIS is set to logic 1, INC_IND or DEC_IND indication can be every frame.