參數(shù)資料
型號(hào): PPC440GX-3RF800CZ
廠商: APPLIEDMICRO INC
元件分類: 微控制器/微處理器
英文描述: Power PC 440GX Embedded Processor
中文描述: 32-BIT, 800 MHz, RISC PROCESSOR, CBGA552
封裝: 25 X 25 MM, ROHS COMPLIANT, CERAMIC, FBGA-552
文件頁數(shù): 88/93頁
文件大?。?/td> 794K
代理商: PPC440GX-3RF800CZ
440GX – Power PC 440GX Embedded Processor
88
AMCC
Revision 1.15 – August 30, 2007
Data Sheet
Example 3:
In this example, ECC is enabled. This requires that Stage 3 data be sampled at
(3)
. If ECC is disabled, the system
will still work, but there will be more latency before the data is sampled into RDSP. Again, T
T
= 1.27ns and T
TE
=
3.589ns at worst case conditions.
DDR SDRAM Read Cycle Timing—Example 3
DQS at pin
PLB Clock
Read Clock Delayed
T
SIN
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 out Stage 3
with ECC
High
Low
T
T
= Propagation delay from Stage 2 input to RDSP input w/o ECC
T
TE
= Propagation delay from Stage 2 input to RDSP input with ECC
D0
D2
D1
D3
Data out Stage 2
High
Low
Data out RDSP
with ECC
High
Low
(3)
T
P
D0
D2
D1
D3
Data in at RDSP
with ECC
High
Low
D0
D2
D1
D3
T
TE
D0
D2
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