参数资料
型号: PPC440GR-3BB533CZ
厂商: APPLIEDMICRO INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 533 MHz, RISC PROCESSOR, PBGA456
封装: 35 X 35 MM, PLASTIC, BGA-456
文件页数: 76/88页
文件大小: 1177K
代理商: PPC440GR-3BB533CZ
78
AMCC Proprietary
Revision 1.19 – May 07, 2008
Preliminary Data Sheet
440GR – PPC440GR Embedded Processor
DDR SDRAM Write Operation
The following diagram illustrates the relationship among the signals involved with a DDR write operation.
Figure 9. DDR SDRAM Write Cycle Timing
Note:
The timing data in the following tables is based on simulation runs using Einstimer.
DQS
MemData
PLB Clk
MemClkOut0
MemClkOut0(90)
Addr/Cmd
TSK
TSA
THA
TDS
TSD
THD
TSD
THD
TSA = Setup time for address and command signals to MemClkOut0(90)
TSK = Delay from rising edge of MemClkOut0(0) to rising/falling edge of signal (skew)
THA = Hold time for address and command signals from MemClkOut0(90)
TDS = Delay from rising/falling edge of clock to the rising/falling edge of DQS
TSD = Setup time for data signals (minimum time data is valid before rising/falling edge of DSQ)
THD = Hold time for data signals (minimum time data is valid after rising/falling edge of DSQ)
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