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): 74/83頁
文件大?。?/td> 773K
代理商: 440GP
440GP – Power PC 440GP Embedded Processor
76
AMCC
Revision 1.07 – October 4, 2007
Data Sheet
In the following examples, the data strobes (DQS) and the data are shown to be coincident. There is actually a
slight skew as specified by the SDRAM specifications, and there can be additional skew due to loading and signal
routing. It is recommended that the signal length for all of the eight DQS signals be matched.
I/O Timing—DDR SDRAM TSIN and TDIN
Notes:
1. TSIN = Delay from DQS at package pin to C on Stage 1 FF.
2. TDIN = Delay from data at package pin to D on Stage 1 FF.
3. The time values for TSIN include 1/4 of a cycle at the indicated clock speed.
Clock Speed (MHz)
Signal Name
TSIN (ns)
minimum
TSIN (ns)
maximum
Signal Name
TDIN (ns)
minimum
TDIN (ns)
maximum
133
DQS0
2.775
3.775
MemData00:07
1.0
2.0
133
DQS1
2.775
3.775
MemData08:15
1.0
2.0
133
DQS2
2.775
3.775
MemData16:23
1.0
2.0
133
DQS3
2.775
3.775
MemData24:31
1.0
2.0
133
DQS4
2.775
3.775
MemData32:39
1.0
2.0
133
DQS5
2.775
3.775
MemData40:47
1.0
2.0
133
DQS6
2.775
3.775
MemData48:55
1.0
2.0
133
DQS7
2.775
3.775
MemData56:63
1.0
2.0
133
DQS8
2.775
3.775
ECC0:7
1.0
2.0
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