参数资料
型号: 440GP
厂商: Applied Micro Circuits Corp.
英文描述: Power PC 440GP Embedded Processor
中文描述: 440GP的Power PC嵌入式处理器
文件页数: 71/83页
文件大小: 773K
代理商: 440GP
440GP – Power PC 440GP Embedded Processor
AMCC
73
Revision 1.07 – October 4, 2007
Data Sheet
I/O Timing—DDR SDRAM TDS
Notes:
1. All of the DQS signals are referenced to MemClkOut0(0).
2. The TDS values in the table include 3/4 of a cycle at the indicated clock speed.
3. To obtain adjusted values for lower clock frequencies, subtract 5.625 ns from the values in the table and add 3/4 of the cycle
time for the lower clock frequency (TDS - 5.625 + 0.75TCYC).
Clock Speed (MHz)
Signal Name
TDS (ns)
Minimum
Maximum
133
DQS0
na
6.25
133
DQS1
na
6.25
133
DQS2
na
6.25
133
DQS3
na
6.25
133
DQS4
na
6.25
133
DQS5
na
6.25
133
DQS6
na
6.25
133
DQS7
na
6.25
133
DQS8
na
6.25
I/O Timing—DDR SDRAM TSK, TSA, and THA
Notes:
1. TSK is referenced to MemClkOut0(0). TSA and THA are referenced to MemClkOut0(90).
2. To obtain adjusted TSA values for lower clock frequencies, use 3/4 of the cycle time for the lower clock frequency and
subtract TSK maximum (0.75TCYC - TSKmax).
3. To obtain adjusted THA values for lower clock frequencies, use 1/4 of the cycle time for the lower clock frequency and add
TSK minimum (0.25TCYC + TSKmin).
Clock Speed (MHz)
Signal Name
TSK (ns)
TSA (ns)
THA (ns)
Minimum
Maximum
Minimum
133
MemAddr00:12
0.4
1.2
4.425
2.275
133
BA0:1
0.4
1.2
4.425
2.275
133
BankSel0:3
0.4
1.2
4.425
2.275
133
ClkEn0:3
0.4
1.2
4.425
2.275
133
CAS
0.4
1.2
4.425
2.275
133
RAS
0.4
1.2
4.425
2.275
133
WE
0.4
1.2
4.425
2.275
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