参数资料
型号: 405EX
厂商: Applied Micro Circuits Corp.
英文描述: PowerPC 405EX Embedded Processor
中文描述: 嵌入式处理器的PowerPC 405EX
文件页数: 60/67页
文件大小: 457K
代理商: 405EX
PPC405EX – PowerPC 405EX Embedded Processor
Revision 1.09 - August 21, 2007
AMCC Proprietary
63
Preliminary Data Sheet
In the following example, 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 DQS signals be matched.
The following example shows the timing relationship between SDRAM DDR Data at the input pin and storing the
data in Stage 1.
Table 24. I/O Timing—DDR SDRAM Read Timing TSD and THD
1. TSD and THD are measured under worst case conditions.
2. Clock speed for the values in the table is 200MHz.
3. The time values in the table include 1/4 of a cycle at 200MHz (5ns x 0.25 = 1.25 ns).
4. To obtain adjusted TSD and THD values for lower clock frequencies, subtract 0.75 ns from the values in the table and add 1/4
of the cycle time for the lower clock frequency (e.g., TSD - 1.25 + 0.25TCYC).
Signal Names
Reference Signal
Read Data vs DQS Set up
TSD (ns)
Read Data vs DQS Hold
THD (ns)
MemData00:07
DQS0
0.35
0.45
MemData08:15
DQS1
0.35
0.45
MemData16:23
DQS2
0.35
0.45
MemData24:31
DQS3
0.35
0.45
ECC0:7
DQS4
0.35
0.45
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405EXR 制造商:AMCC 制造商全称:Applied Micro Circuits Corporation 功能描述:Embedded Processor
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405F 制造商:ebm-papst Inc 功能描述:FAN 40MM 5VDC
405F/2H 功能描述:风扇 40x40x10mm 5VDC RoHS:否 制造商:Sanyo Denki 产品:Fans 电流类型: 电源电压:48 V 气流:636 CFM 轴承类型: 噪声:83 dBA 速度:6400 RPM 功率额定值:264 W 框架尺寸 (mm):172 mm x 150 mm x 102 mm 外壳材料:Aluminum 端接类型:Wire 系列: