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參數(shù)資料
| 型號： | PPC440GR-3pbfffCx |
| 廠商： | Applied Micro Circuits Corp. |
| 英文描述： | Power PC 440GR Embedded Processor |
| 中文描述： | 440GR的Power PC嵌入式處理器 |
| 文件頁數(shù)： | 76/82頁 |
| 文件大?。?/td> | 527K |
| 代理商： | PPC440GR-3PBFFFCX |
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76
AMCC Proprietary
Revision 1.16 – July 19, 2006
Preliminary Data Sheet
440GR – PPC440GR Embedded Processor
Example 1:
If the data-to-PLB clock timing is as shown in the example below, then the read clock is not delayed and the Stage
1 data is sampled at
(1)
. Except for small, low frequency memory systems with the memory located physically close
to the PPC440GR, it is unlikely that Stage 1 data can be sampled. When the data comes later, it is necessary to
sample Stage 2 or Stage 3 data. (see Examples 2 and 3). Another way to get the desired data-to-PLB timing to
allow Stage 1 sampling is to buffer MemClkOut0 and skew it enough to guarantee the timing. In this example, T
T
is
controlled and set by the software.
Figure 11. DDR SDRAM Read Cycle Timing—Example 1
DQS at pin
PLB Clock
T
SIN
T
DIN
= Delay from data at package pin to D on Stage 1 FF.
T
T
= Propagation delay, Stage 1 input to RDSP input w/o ECC
T
SIN
= Delay from DQS at package pin to C on Stage 1 FF.
T
P
= Propagation delay through FFs
Data at pin
D0
D1
D2
D3
DQS Stage 1 C
D0
D1
D2
D3
T
DIN
D0
D2
Data in Stage 1 D
D1
D3
Data out Stage 1
High
Low
T
P
D0
D2
D1
D3
Data in at RDSP
with no ECC
High
Low
T
T
D0
D2
D1
D3
Data out RDSP
High
Low
(1)
D2
D2
T
P
D0
D0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PPC440GRx-NpAfffTs | PowerPC 440GRx Embedded Processor |
| PPC440GRx-SpAfffTs | PowerPC 440GRx Embedded Processor |
| PPC440GX-3RF800CZ | Power PC 440GX Embedded Processor |
| PPC440GX-3CC533S | Power PC 440GX Embedded Processor |
| PPC440GX-3CC667S | Power PC 440GX Embedded Processor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PPC440GRX-NPAFFFTS | 制造商:AMCC 制造商全稱:Applied Micro Circuits Corporation 功能描述:PowerPC 440GRx Embedded Processor |
| PPC440GRX-NTA400E | 制造商:AMCC 功能描述:32 BIT POWERPC CORE, UP TO 667 MHZ, 2 10/100/1000 ETHERNET, - Trays |
| PPC440GRX-NTA400EZ | 制造商:AMCC 功能描述:32 BIT POWERPC CORE, UP TO 667 MHZ, 2 10/100/1000 ETHERNET, - Tape and Reel |
| PPC440GRX-NTA533EZ | 制造商:AMCC 功能描述:32 BIT POWERPC CORE, UP TO 667 MHZ, 2 10/100/1000 ETHERNET, - Tape and Reel |
| PPC440GRX-NTA667EZ | 制造商:AMCC 功能描述:32 BIT POWERPC CORE, UP TO 667 MHZ, 2 10/100/1000 ETHERNET, - Tape and Reel |
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