參數(shù)資料
型號: IDT88K8483BRI
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 27/162頁
文件大小: 0K
描述: IC SPI-4 EXCHANGE 3PORT 672-BGA
標準包裝: 24
系列: *
其它名稱: 88K8483BRI
122 of 162
October 20, 2006
IDT IDT88K8483
PFP Egress Burst Size Table
There are 64 registers in this table, one for each LID.
PFP Egress Weight And Direction Register
There are 64 registers in this table, one for each LID.
Field
Read /
Write
Bits
Length Reset
State
Description
MAX_BURST_S
R/W
0:0-0:3
4
0xF
The maximum data burst size transferred to the egress interface when a starving
status signal is received. The actual burst size is equal to (MAX_BURST_S+1)*16
bytes
MAX_BURST_H
R/W
0:4-0:7
4
0xF
The maximum data burst size transferred to the egress interface when a hungry sta-
tus signal is received. The actual burst size is equal to (MAX_BURST_H+1)*16
bytes.
Note: The MAX_BURST_H and MAX_BURST_S values relate to MaxBurst2 and MaxBurst1 parameters in the OIF SPI-4 implementation agreement (OIF-SPI-4-
02.1).
Table 98 PFP Egress Burst Size Table (Block Base=0x1400/0x1C00, Register Offset=0x00-0x3F)
Field
Read /
Write
Bits
Length Reset
State
Description
DIR[1:0]
R/W
0:0-0:1
2
11
Indicates the PFP LID direction. Each LID has 4 directions.
T-M PFP
M-T PFP
------------------------------------------------------------------------------
00:
Main SPI-4
Tributary SPI-4
01:
Redirect
Loopback
10:
Extract (OBC for A)
(PRBS for B)
(Auxiliary for B)
11:
Discard
WEIGHT
R/W
0:2
1
0
This field sets the priority mode of the LIDs. This weight is used by the egress server
scheduler to service the LIDs when the WEIGHT_EN field in PFP Queue Weighting
0: Low priority for this LID, denoted by the register offset.
1:High priority for this LID, denoted by the register offset.
Note: Please refer to page 52 for a detailed explanation of PFP weighing and scheduling.
Table 99 PFP Egress Weight And Direction Register
(Block Base=0x1500/0x1D00, Register Offset=0x00-03F)
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