參數(shù)資料
型號: PPC405EX-SpAfffTx
廠商: Applied Micro Circuits Corp.
英文描述: PowerPC 405EX Embedded Processor
中文描述: 嵌入式處理器的PowerPC 405EX
文件頁數(shù): 59/67頁
文件大小: 457K
代理商: PPC405EX-SPAFFFTX
PPC405EX – PowerPC 405EX Embedded Processor
Revision 1.09 - August 21, 2007
AMCC Proprietary
59
Preliminary Data Sheet
Table 19. DDR SDRAM Output Driver Specifications
DDR SDRAM Write Operation
The rising edge of MemClkOut aligns with the first rising edge of the DQS signal on writes. The following data is
generated by means of simulation and includes logic, driver, package RLC, and lengths. Values are calculated
over best case and worst case processes with speed, junction temperature, and voltage as follows:
Note:
In the following tables and timing diagrams, minimum values are measured under best case conditions and
maximum values are measured under worst case conditions. The timing numbers in the following sections are
obtained using a simulation that assumes a model as shown in
Figure 6
.
Signal Path
Output Current (mA)
I/O H (maximum)
I/O L (maximum)
Write Data
MemData00:31
ECC0:7
DM0:4
MemClkOut
MemAddr00:14
BA0:2
RAS
CAS
WE
BankSel0:1
MemClkEn
DQS0:4
MemODT0:1
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
Table 20. DDR SDRAM Write Operation Conditions
Case
Process Speed
Junction Temperature (°C)
Voltage (V)
Best
Fast
40
+1.3
Worst
Slow
+125
+1.1
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