參數(shù)資料
型號: MCF52277CVM166
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 166.67 MHz, RISC PROCESSOR, PBGA196
封裝: 15 X 15 MM, PLASTIC, ROHS COMPLIANT, MAPBGA-196
文件頁數(shù): 16/42頁
文件大小: 1632K
代理商: MCF52277CVM166
Electrical Characteristics
MCF5227x ColdFire Microprocessor Data Sheet, Rev. 4
Preliminary—Subject to Change Without Notice
Freescale Semiconductor
23
Figure 10. SDR Write Timing
Figure 11. SDR Read Timing
5.7.2.2
DDR SDRAM AC Timing Specifications
When using the SDRAM controller in DDR mode, the following timing numbers must be followed to properly latch or drive
data onto the memory bus. All timing numbers are relative to the two DQS byte lanes.
SD_CLK
SDDM
D[31:0]
A[23:0]
SD_BA[1:0]
CMD
ROW
SD1
SD4
COL
SD5
WD1
WD2
WD3
WD4
SD12
SD11
SD_CSn
SD_RAS
SD_WE
SD_CAS
SD2
SD3
SD_CLK
SD_CSn,
SDDM
D[31:0]
A[23:0],
SD_RAS,
SD_BA[1:0]
CMD
ROW
SD1
SD4
COL
WD1
WD2
WD3
WD4
SD9
3/4 MCLK
SD_SDR_DQS
SD_DQS[3:2]
Delayed
SD10
SD7
Board Delay
SD8
Board Delay
SD6
tDQS
Reference
SD_CLK
from
Memories
(Measured at Output Pin)
(Measured at Input Pin)
SD5
NOTE: Data driven from memories relative
to delayed memory clock.
SD_WE
SD_CAS,
SD2
SD3
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