參數(shù)資料
型號(hào): PM7351-BI
廠商: PMC-SIERRA INC
元件分類: 數(shù)字傳輸電路
英文描述: OCTAL SERIAL LINK MULTIPLEXER
中文描述: ATM/SONET/SDH SUPPORT CIRCUIT, PBGA304
封裝: 31 X 31 MM, 1.51 MM HEIGHT, 1.27 MM PITCH, SBGA-304
文件頁數(shù): 114/174頁
文件大?。?/td> 1790K
代理商: PM7351-BI
RELEASED
PM7351 S/UNI-VORTEX
DATA SHEET
PMC-1980582
ISSUE 5
OCTAL SERIAL LINK MULTIPLEXER
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
104
Registers 0x090, 0x0B0, 0x0D0, 0x0F0, 0x110, 0x130, 0x150, 0x170:
Transmit High-Speed Serial Configuration
Bit
Type
Function
Default
Bit 7
R/W
DSCR
0
Bit 6
R/W
HSCR
1
Bit 5
R/W
Unused
X
Bit 4
R/W
DHCS
0
Bit 3
R/W
CELLCRC
0
Bit 2
R/W
PREPEND
0
Bit 1
R/W
USRHDR[1]
1
Bit 0
R/W
USRHDR[0]
0
These registers configure, on a per-link basis, the format of the cells transmitted
on the eight TXDn+/- serial links.
USRHDR[1:0]:
The USRHDR[1:0] bits determine the length of the User Header field of the
transmitted cells. The User Header defaults to six bytes.
USRHDR[1:0]
Bytes in User Header
00
4
01
5
10
6
11
Reserved
PREPEND:
The PREPEND bit determines if the User Prepend field is inserted into the
transmitted cells. If PREPEND is logic 1, a two byte User Prepend is inserted
after the System Prepend field.
CELLCRC:
The CELLCRC bit determines whether the entire high speed serial data
structure is protected by a CRC-8 code word. The PREPEND bit must be
logic 1 for this bit to have effect. If CELLCRC and PREPEND are logic 1, the
second User Prepend byte is overwritten by the CRC-8 syndrome for the
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