參數(shù)資料
型號(hào): PPC440SP-RFC533C
廠商: APPLIEDMICRO INC
元件分類: 微控制器/微處理器
英文描述: PowerPC 440SP Embedded Processor
中文描述: 32-BIT, 533 MHz, RISC PROCESSOR, PBGA783
封裝: 29 X 29 MM, 1 MM PITCH, PLASTIC, FCBGA-783
文件頁(yè)數(shù): 79/85頁(yè)
文件大?。?/td> 615K
代理商: PPC440SP-RFC533C
PowerPC 440SP Embedded Processor
Revision 1.23 - Sept 26, 2006
Data Sheet
AMCC Proprietary
79
DDR SDRAM Clock to Write DQS Timing—T
DS
Note 1:
All of the DQS signals are referenced to MemClkOut.
Note 2:
Clock speed is 333 MHz.
Note 3:
The TDS values in the table include 1.5
×
3ns cycle at 333 MHz (3 ns
×
1.5 = 4.5 ns).
Note 4:
To obtain adjusted values for lower clock frequencies, subtract 4 ns from the values in the following table
and add
×
1.5 of the cycle time for the lower clock frequency (T
DS
- 4.5 + 1.5 T
CYC
).
DDR SDRAM Write Data to DQS Timing—T
SD and
T
HD
Note 1:
T
SD
and T
HD
are measured under worst-case conditions.
Note 2:
Clock speed for the values in the following table is 333 MHz.
Table 18. DDR SDRAM Clock to Write DQS Timing—T
DS
Signal Name
T
DS
(ns)
Minimum
Maximum
DQS0
4.76
5.07
DQS1
4.78
5.09
DQS2
4.78
5.10
DQS3
4.76
5.07
DQS4
4.79
5.11
DQS5
4.80
5.13
DQS6
4.81
5.11
DQS7
4.79
5.11
DQS8
4.77
5.07
Table 19. DDR SDRAM Write Data to DQS Timing—T
SD
and T
HD
Signal Name
Reference Signal
T
SD
(ns)
T
HD
(ns)
MemData00:07, DM0
DQS0
0.58
0.64
MemData08:15, DM1
DQS1
0.62
0.55
MemData16:23, DM2
DQS2
0.62
0.60
MemData24:31, DM3
DQS3
0.63
0.57
MemData32:39, DM4
DQS4
0.68
0.54
MemData40:47, DM5
DQS5
0.67
0.52
MemData48:55, DM6
DQS6
0.62
0.61
MemData56:63, DM7
DQS7
0.65
0.55
ECC0:7, DM8
DQS8
0.63
0.61
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