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PPC440EP 데이터시트(PDF) 78 Page - Applied Micro Circuits Corporation

부품명 PPC440EP
상세설명  Power PC 440EP Embedded Processor
PDF  84 Pages
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제조업체  AMCC [Applied Micro Circuits Corporation]
홈페이지  http://www.amcc.com
Logo AMCC - Applied Micro Circuits Corporation

PPC440EP 데이터시트(HTML) 78 Page - Applied Micro Circuits Corporation

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AMCC Proprietary
440EP – PPC440EP Embedded Processor
Revision 1.26 – April 25, 2007
Data Sheet
Example 2:
In this example Read Clock is delayed almost 1/2 cycle. Without ECC, Stage 2 data can be sampled at (2). If ECC
is enabled, Stage 3 data must be sampled (see Example 3). In this example, TT and TTE are system dependent
and taken into account by controller initialization software.
Figure 12. DDR SDRAM Read Cycle Timing—Example 2
DQS at pin
PLB Clock
Read Clock Delayed
TSIN
Data at pin
D0
D1
D2
D3
DQS Stage 1 C
D0
D1
D2
D3
TDIN
D0
D2
Data in Stage 1 D
D1
D3
Data out Stage 1
High
Low
TP
D0
D2
D1
D3
Data in at RDSP
High
Low
without ECC
TT = Propagation delay from Stage 2 input to RDSP input w/o ECC
D0
D2
D1
D3
Data out Stage 2
High
Low
Data out at RDSP
High
Low
(2)
without ECC
TP
D0
D2
D1
D3
Data in at RDSP
High
Low
with ECC
D0
D2
D1
D3
TTE = Propagation delay from Stage 2 input to RDSP input with ECC
TT
TTE
D0
D2



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