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| 型号： | IDT88P8341BHGI |
| 厂商： | IDT, Integrated Device Technology Inc |
| 文件页数： | 18/96页 |
| 文件大小： | 0K |
| 描述： | IC SPI3-SPI4 EXCHANGE 820-PBGA |
| 标准包装： | 24 |
| 系列： | * |
| 其它名称： | 88P8341BHGI |
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25
IDT88P8341 SPI EXCHANGE SPI-3 TO SPI-4
INDUSTRIALTEMPERATURERANGE
APRIL 10, 2006
4.1 SPI-3 to SPI-4 datapath and flow control
Two packet fragment processor modules from SPI-3 to SPI-4 are provided.
One packet fragment processor module is associated with one SPI-3 ingress
interface. The packet fragment processor module connects to the SPI-4
interface.
PacketfragmentsfromtheSPI-3ingressarereceivedintotheSPI-3ingress
portbuffers.Apacketfragmentprocessortransferscompletepacketfragments
from the SPI-3 ingress port buffers to memory segments previously reserved
on a per-LP basis in the buffer segment pool. The SPI-3 ingress port buffer
watermarkandtheper-LPfreebuffersegmentthresholdinformationiscombined
to produce SPI-3 ingress FIFO status towards the attached device. Packets or
packet fragments received on one SPI-3 ingress logical port can be forwarded
to any one of:
A logical port on the egress SPI-4 interface.
The microprocessor interface, using the capture buffer.
Theconnectiononthelogicalportlevelisperformedthroughanintermediate
mapping to a Link Identification number (LID).
Figure 13. SPI-3 ingress to SPI-4 egress packet fragment processor
6372 drw14
buffer segment pool
PMON & DIAG
SPI3 egress port
buffers
uP
Associated
egress PFP
capture
buffer
SPI-3
redirect
buffers
uP
insert buffer
SPI3 Ingress
SPI4 Egress
FIFO status
SPI3 ingress port
buffers
SPI-3 ingress PFP functions
Thepacket fragmentprocessor(PFP)receivesstatusinformationaboutthe
SPI-3ingressbuffersandthemicroprocessorinsertbuffer.ThePFPprocesses
SPI-3 ingress buffers in high priority and the insert buffer with low priority. The
PFP copies data into the buffer segment , requests new buffer segments, and
generates entries in the SPI4-egress queue.
SPI-3 ingress buffer processing
The PFP verifies whether a SPI-3 ingress buffer is occupied. If the SPI-3
ingress buffer is not occupied the PFP processes the insert buffer.
Normal operation
Inloopbackmode,alloftheSPI-3ingressbuffersofaphysicalSPI-3portare
copied into the SP-3 egress buffers of that same port. This is a test mode only,
as no non-loopback traffic can be transferred at this time.
In non – loop back mode (normal operation) the SPI-3 ingress buffers are
forwarded to the LID process by the PFP.
TheLIDprocessgeneratesasetofeventsforanassociatedLID.Theevents
that are directed towards the PMON&DIAG module are:
SPI-3 error tagged packet event (errored packets)
SPI-3 EOP event (all packets)
SPI-3 fragment event (all fragments) with an associated length field
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IDT88P8341BHI | 功能描述:IC SPI3-SPI4 EXCHANGE 820-PBGA RoHS:否 类别:集成电路 (IC) >> 专用 IC 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:调帧器 应用:数据传输 安装类型:表面贴装 封装/外壳:400-BBGA 供应商设备封装:400-PBGA（27x27） 包装:散装 |
| IDT88P8342BHGI | 功能描述:IC SPI3-SPI4 EXCHANGE 820-PBGA RoHS:是 类别:集成电路 (IC) >> 专用 IC 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:调帧器 应用:数据传输 安装类型:表面贴装 封装/外壳:400-BBGA 供应商设备封装:400-PBGA（27x27） 包装:散装 |
| IDT88P8342BHI | 功能描述:IC SPI3-SPI4 EXCHANGE 820-PBGA RoHS:否 类别:集成电路 (IC) >> 专用 IC 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:调帧器 应用:数据传输 安装类型:表面贴装 封装/外壳:400-BBGA 供应商设备封装:400-PBGA（27x27） 包装:散装 |
| IDT88P8344 | 制造商:IDT 制造商全称:Integrated Device Technology 功能描述:SPI EXCHANGE 4 x SPI-3 TO SPI-4 Issue 1.0 |
| IDT88P8344BHGI | 功能描述:IC SPI3-SPI4 EXCHANGE 820-PBGA RoHS:是 类别:集成电路 (IC) >> 专用 IC 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:调帧器 应用:数据传输 安装类型:表面贴装 封装/外壳:400-BBGA 供应商设备封装:400-PBGA（27x27） 包装:散装 |
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