参数资料
型号: 440SPE
厂商: Applied Micro Circuits Corp.
英文描述: PowerPC 440SPe Embedded Processor
中文描述: 嵌入式处理器的PowerPC 440SPe
文件页数: 73/80页
文件大小: 572K
代理商: 440SPE
PowerPC 440SPe Embedded Processor
Revision 1.23 - Sept 21, 2006
AMCC Proprietary
75
Preliminary 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.
Figure 10. DDR SDRAM Memory Data and DQS
Table 20. DDR SDRAM I/O Read Timing—TSD and THD
Notes:
1. TSD and THD are measured under worst case conditions.
2. Clock speed for the values in the table is 333.33MHz.
3. The time values in the table include 1/4 of a cycle at 166MHz (3ns x 0.25 = 0.75 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 - 0.75 + 0.25TCYC).
Signal Names
Reference Signal
Read Data vs DQS Set up
TSD (ns)
Read Data vs DQS Hold
THD (ns)
MemData00:07
DQS0
0.00
1.00
MemData08:15
DQS1
0.00
1.00
MemData16:23
DQS2
0.00
1.00
MemData24:31
DQS3
0.00
1.00
MemData32:39
DQS4
0.00
1.00
MemData40:47
DQS5
0.00
1.00
MemData48:55
DQS6
0.00
1.00
MemData56:63
DQS7
0.00
1.00
ECC0:7
DQS8
0.00
1.00
DQS
MemData
TSD
THD
相关PDF资料
PDF描述
440SP PowerPC 440SP Embedded Processor
4414-308 8 POS SOIC ADAPTER
4414-308LF 8 POS SOIC ADAPTER
4414-314 14 POS SOIC ADAPTER
4414-314LF 14 POS SOIC ADAPTER
相关代理商/技术参数
参数描述
440SRIB 制造商:未知厂家 制造商全称:未知厂家 功能描述:SMOKE ALARM 12-28VDC B/BK
440SS001M08 制造商:GLENAIR 制造商全称:Glenair, Inc. 功能描述:EMI/RFI Crimp Ring Adapter Direct Coupling - Standard Profile
440SS001M09 制造商:GLENAIR 制造商全称:Glenair, Inc. 功能描述:EMI/RFI Crimp Ring Adapter Direct Coupling - Standard Profile
440SS001M10 制造商:GLENAIR 制造商全称:Glenair, Inc. 功能描述:EMI/RFI Crimp Ring Adapter Direct Coupling - Standard Profile
440SS001M11 制造商:GLENAIR 制造商全称:Glenair, Inc. 功能描述:EMI/RFI Crimp Ring Adapter Direct Coupling - Standard Profile