參數(shù)資料
型號(hào)： PPC440GRX-STA400TZ
廠商： APPLIEDMICRO INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 400 MHz, RISC PROCESSOR, PBGA680
封裝： 35 MM, THERMALLY ENHANCED, PLASTIC, BGA-680
文件頁數(shù)： 81/88頁
文件大?。?/td> 1367K
代理商： PPC440GRX-STA400TZ
440GRx – PPC440GRx Embedded Processor
Preliminary Data Sheet
82
AMCC Proprietary
Revision 1.08 – October 15, 2007
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 10, DDR SDRAM Simulation Signal
RAS
10
CAS
10
WE
10
BankSel0:1
10
ClkEn
10
DQS0:8
10
MemODT0:1
10
Table 24. DDR SDRAM Write Operation Conditions
Case
Process Speed
Junction Temperature (°C)
Voltage (V)
Best
Fast
40
+1.6
Worst
Slow
+125
+1.425
Table 23. DDR SDRAM Output Driver Specifications (Sheet 2 of 2)
Signal Path
Output Current (mA)
I/O H (maximum)
I/O L (maximum)
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