參數(shù)資料
型號: 440GP
廠商: Applied Micro Circuits Corp.
英文描述: Power PC 440GP Embedded Processor
中文描述: 440GP的Power PC嵌入式處理器
文件頁數(shù): 73/83頁
文件大小: 773K
代理商: 440GP
440GP – Power PC 440GP Embedded Processor
AMCC
75
Revision 1.07 – October 4, 2007
Data Sheet
DDR SDRAM MemClkOut0 and Read Clock Delay
In operation, following the receipt of an address and read command from the PPC440GP, the SDRAM generates
data and the DQS signals coincident with MemClkOut0. The data is latched into the PPC440GP using a DQS
signal that is delayed 1/4 of a cycle. In order to accommodate timing variations introduced by the system designs
using this chip, the three-stage data path shown below is used to eliminate metastability and allow data sampling to
be adjusted for minimum latency. This adjustment requires programming the Read Clock delay and the selection of
Stage 1, Stage 2, or Stage 3 data for sampling at RDSP.
DDR SDRAM Read Data Path
Read Clock
PLB Clk
MemClkOut0(0)
TMD
TRD
TMDmin =
TMDmax =
TRDmin =
TRDmax =
850ps
2600ps
300ps
0ps
Stage 1
Stage 2
Stage 3
RDSP
PLB bus
FF,
FF
Data
Read Select
(SDRAM0_TR1)
DQS
1/4
Cycle
Delay
PLB Clock
Programmed
Delay
D
C
Package pins
Mux
Read Clock
C
D
FF Timing:
TIS = Input setup time = 0.2ns
TIH = Input hold time = 0.1ns
TP = Propagation delay (D to Q or C to Q) =
XL
ECC
FF: Flip-Flop
XL: Transparent Latch
Q
0.6ns maximum
相關(guān)PDF資料
PDF描述
440GRX PowerPC 440GRx Embedded Processor
440GR Power PC 440GR Embedded Processor
440GX Power PC 440GX Embedded Processor
440SPE PowerPC 440SPe Embedded Processor
440SP PowerPC 440SP Embedded Processor
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
440GR 制造商:AMCC 制造商全稱:Applied Micro Circuits Corporation 功能描述:Power PC 440GR Embedded Processor
440GRX 制造商:AMCC 制造商全稱:Applied Micro Circuits Corporation 功能描述:PowerPC 440GRx Embedded Processor
440GS001NF1934-4 功能描述:環(huán)形MIL規(guī)格后蓋 CRIMIP RING ADPTR DC STRAIGHT RoHS:否 制造商:Amphenol PCD MIL 類型:MIL-DTL-38999 III, IV 系列:AS85049 產(chǎn)品類型:Environmental EMI/RFI Backshells 外殼類型:Straight 外殼大小:18 外殼材質(zhì):Aluminum Alloy
440GS001NF2535-4 功能描述:環(huán)形MIL規(guī)格后蓋 CRIMIP RING ADPTR DC STRAIGHT RoHS:否 制造商:Amphenol PCD MIL 類型:MIL-DTL-38999 III, IV 系列:AS85049 產(chǎn)品類型:Environmental EMI/RFI Backshells 外殼類型:Straight 外殼大小:18 外殼材質(zhì):Aluminum Alloy
440GS031B2912-4 制造商:Glenair Inc 功能描述:Shrink Boot Adapters 180° 29 Shell Size Olive Drab Cadmium Aluminum Direct 制造商:Glenair 功能描述:Shrink Boot Adapters 180° 29 Shell Size Olive Drab Cadmium Aluminum Direct