Download MPC8240 Integrated Processor User`s Manual

Transcript
Freescale Semiconductor, Inc.
SDRAM Interface Operation
Figure 6-12 shows a four-beat burst-write operation.
SDRAM
CLK[0:3]
CKE
CS
SDRAS
SDCAS
Freescale Semiconductor, Inc...
ADDR
ROW
COL
ROW
WE
ACTORW
DQM[0:7]
DATA
D0 D1 D2 D3
Write
DQM and data latency = 0 for writes
Figure 6-12. SDRAM Four-Beat Burst Write Timing—64-Bit Mode
SDRAM
CLK[0:3]
CKE
CS
SDRAS
SDCAS
ADDR
ROW
COL
WE
ACTORW
DQM[0:7]
DATA
D0 D1 D2 D3 D4 D5 D6 D7
Write
DQM and data latency = 0 for writes
Figure 6-13. SDRAM Eight-Beat Burst Write Timing—32-Bit Mode
Chapter 6. MPC8240 Memory Interface
For More Information On This Product,
Go to: www.freescale.com