PPC440GX-3NF667C Applied Micro Circuits Corporation, PPC440GX-3NF667C Datasheet - Page 80

• Manufacturer Part Number: PPC440GX-3NF667C
• Manufacturer: Applied Micro Circuits Corporation

Specifications of PPC440GX-3NF667C

• Family Name: 440GX
• Device Core: PowerPC
• Device Core Size: 32b
• Frequency (max): 667MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 1.55/2.5V
• Operating Supply Voltage (max): 1.6/2.7V
• Operating Supply Voltage (min): 1.5/2.3V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 552
• Package Type: FCBGA
• Lead Free Status / Rohs Status: Compliant

440GX – Power PC 440GX Embedded Processor
80
DDR SDRAM Write Operation
The following diagram illustrates the relationship among the signals involved with a DDR write operation.
DDR SDRAM Write Cycle Timing
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 edge of MemClkOut0(0) to rising/falling edge of signal (skew)
= 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)
= Delay from rising/falling edge of clock to the rising/falling edge of DQS
= Hold time for address and command signals from MemClkOut0(90)
DQS
T
T
SK
T
SA
HA
T
DS
T
SD
T
T
HD
DS
T
SD
T
HD
Revision 1.20 – June 9, 2009
Data Sheet
AMCC