Released
PMC-Sierra, Inc.
PM9311/2/3/5 ETT1™ CHIP SET
Data Sheet
PMC-2000164
ISSUE 3
ENHANCED TT1™ SWITCH FABRIC
2.3.2.25 8B/10B Encoder Lookup Table
Symbol: D8BCOD
Address Offset: 80000-807FCh
Default Value: Unknown
Access:
Read/Write
The actual 8B/10B encoder lookup table address range extends from 0x80000 to 0x804FC. Beyond
8B/10B encoder lookup table address 0x804FC aliasing will occur within the 8B/10B encoder lookup table
320x26 RAM.
The 8B/10B encoder lookup table address space is defined as:
•
•
0x80000-0x803FC: Lookup of 8B data bytes into 10B data characters.
0x80400-0x80414: Lookup of idle 8B/10B control sequence (suggested 10B control sequence:
0x80400 = K28.5 and 0x80404-0x80414 = K27.7).
•
0x80420-0x80434: Lookup of idle-ready 8B/10B control sequence (suggested 10B control
sequence: 0x80420 = K28.5 and 0x80424-0x80434 = K29.7).
The 8B/10B encoder lookup table data bitmap consists of the following:
Bits
Description
31:26 Reserved.
25:23 Weight of the positive RDS 10B character.
22:13 Positive RDS 10B character.
12:10 Absolute weight of the negative RDS 10B character.
9:0
Negative RDS 10B character.
NOTE: Bit 0 and bit 13 represent the bit that would be transmitted first for each respective 10B
character.
134
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
PMC [ PMC-SIERRA, INC ]
