ppc440grx Applied Micro Circuits Corporation (AMCC), ppc440grx Datasheet - Page 83

• Manufacturer Part Number: ppc440grx
• Description: Powerpc 440grx Embedded Processor
• Manufacturer: Applied Micro Circuits Corporation (AMCC)

Revision 1.11 – July 22, 2008
Table 23. DDR SDRAM Output Driver Specifications (Sheet 2 of 2)
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
Termination Model.
AMCC Proprietary
Preliminary Data Sheet
RAS
CAS
WE
BankSel0:1
ClkEn
DQS0:8
MemODT0:1
Table 24. DDR SDRAM Write Operation Conditions
Worst
Case
Best
Signal Path
Process Speed
Slow
Fast
I/O H (maximum)
10
10
10
10
10
10
10
440GRx – PPC440GRx Embedded Processor
Junction Temperature (°C)
Output Current (mA)
+125
−40
I/O L (maximum)
10
10
10
10
10
10
10
Voltage (V)
+1.425
+1.6
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