PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
Indirect Register 03H: THPP Arbitrary Pointer Register
Bit
Type
Function
Default
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
NDF[3]/CONCAT[15]
NDF[2]/CONCAT[14]
NDF[1]/CONCAT[13]
NDF[0]/CONCAT[12]
S[1]/CONCAT[11]
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
S[0]/CONCAT[10]
APTR[9]/CONCAT[9]
APTR[8]/CONCAT[8]
APTR[7]/CONCAT[7]
APTR[6]/CONCAT[6]
APTR[5]/CONCAT[5]
APTR[4]/CONCAT[4]
APTR[3]/CONCAT[3]
APTR[2]/CONCAT[2]
APTR[1]/CONCAT[1]
APTR[0]/CONCAT[0]
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
APTR[9:0]:
The APTR[9:0] bits are used to set an arbitrary payload pointer value. The arbitrary pointer
value is transferred by writing a logic one to the PLD bit in the THPP Control Register. A legal
value (i.e. 0- 782) results in the THPP forcing a shifting to the corresponding byte position. If
the FTPTR bit is a logic 1, the current APTR[9:0] value is inserted into the payload pointer
bytes (H1 and H2) continueously.
These bits are only valid for THPP STS-1/STM0 #1.
S[1:0]:
The S[1:0] bits contain the value inserted in the S[1:0] bit positions in the payload pointer.
These bits are only valid for THPP STS-1/STM0 #1.
NDF[3:0]:
The NDF[3:0] bits contain the value inserted in the NDF bit positions of a pointer.
These bits are only valid for THPP STS-1/STM0 #1.
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
236
PMC [ PMC-SIERRA, INC ]
