PPC440EP-3BC400C Applied Micro Circuits Corporation, PPC440EP-3BC400C Datasheet - Page 77

• Manufacturer Part Number: PPC440EP-3BC400C
• Manufacturer: Applied Micro Circuits Corporation

Specifications of PPC440EP-3BC400C

• Family Name: 440EP
• Device Core: PowerPC
• Device Core Size: 16b
• Frequency (max): 400MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 1.5/2.5V
• Operating Supply Voltage (max): 1.6/2.7V
• Operating Supply Voltage (min): 1.4/2.3V
• Operating Temp Range: -40C to 90C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 456
• Lead Free Status / RoHS Status: Not Compliant

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
AMCC Proprietary
440EP – PPC440EP Embedded Processor
MemClkOut0(90)
MemClkOut0
T
T
T
T
T
T
HD
SA
SD
DS
SK
HA
Addr/Cmd
MemData
PLB Clk
= Setup time for address and command signals to MemClkOut0(90)
= Delay from rising/falling edge of clock to the rising/falling edge of DQS
= Delay from rising edge of MemClkOut0(0) to rising/falling edge of signal (skew)
= Hold time for address and command signals from MemClkOut0(90)
= Setup time for data signals (minimum time data is valid before rising/falling edge of DSQ)
= Hold time for data signals (minimum time data is valid after rising/falling edge of DSQ)
DQS
T
SK
T
T
SA
HA
T
DS
T
SD
T
T
HD
DS
T
SD
T
HD
Revision 1.29 – May 07, 2008
Data Sheet
77