An application example for flow " />
參數(shù)資料
型號: IDT88K8483BRI
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 117/162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
58 of 162
October 20, 2006
IDT IDT88K8483
Figure 26 QDR-II Flow Control Example For Buffering Option
An application example for flow control mode 2 is described in Figure 22. In this case there is no over-booking, and there can be frequent back-
pressure.
Figure 27 Flow Control Mode 2 Application Example
Impedance Matching Control
The auxiliary interface egress side has impedance matching control. It has on chip test circuit that automatically adjusts the impedance of the auxil-
iary interface egress data and control signals according to the 100 OHM pull down resistor that is connected to the QDR_IMP external signal.
satisfied
Starving
satisfied
QDR-II (8K segments, 2M bytes, 16M bits)
Early Back Pressure Free Segments per LID 0 = 100
Hungry
Starving
Second Free Segments per LID 0 = 6
Maximum Number Of Segments for LID 0 = 128
Hungry
Early Back Pressure Free Segment per LID 1 = 100
Second Free Segments for LID 1 = 6
Maximum Number Of Segments for LID 1 = 128
SPI-4
Ingress
Port
Buffer
SPI-4
Egress
Port
Buffer
PFP
Ingress
SPI-4
Ingress
Interface
SPI-4
Egress
Interface
QDR-II
PFP
Egress
Framer
NP
508 segments
127K bytes
508 segments
127K bytes
8K segments
2M bytes
Interleaving
Interleaved
Channels
Non-Interleaved
Channels
data
status
data
status
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