PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
Indirect Register 05H: THPP B3 Mask and Fixed Stuff Byte
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
B3MASK[7]
B3MASK[6]
B3MASK[5]
B3MASK[4]
B3MASK[3]
B3MASK[2]
B3MASK[1]
B3MASK[0]
FSB[7]
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit 8
Bit 7
Bit 6
FSB[6]
Bit 5
FSB[5]
Bit 4
FSB[4]
Bit 3
FSB[3]
Bit 2
FSB[2]
Bit 1
FSB[1]
Bit 0
FSB[0]
FSB[7:0]:
When the FSBEN bit in the THPP Control register is logic one, the THPP replaces the fixed
bytes with the byte from this register.
This field should be consistent for all THPP STS-1/STM0 #1 through #48.
B3MASK[7:0]:
The calculated B3 parity byte is always XORed with this register bit to allow the user to insert
errors in B3.
This field is only valid for THPP STS-1/STM0 #1.
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
238
PMC [ PMC-SIERRA, INC ]
