参数资料
型号: MPC5200CVR400B
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 400 MHz, MICROPROCESSOR, PBGA272
封装: 27 X 27 MM, 1.27 MM PITCH, ROHS COMPLIANT, PLASTIC, BGA-272
文件页数: 14/78页
文件大小: 1100K
代理商: MPC5200CVR400B
Electrical and Thermal Characteristics
MPC5200B Data Sheet, Rev. 1
Freescale Semiconductor
21
Figure 6. Timing Diagram—Standard SDRAM Memory Write Timing
3.3.5.3
Memory Interface Timing-DDR SDRAM Read Command
The SDRAM Memory Controller uses a 1/4 period delayed MDQS strobe to capture the MDQ data. The
1/4 period delay value is calculated automatically by hardware.
Table 19. Standard SDRAM Write Timing
Sym
Description
Min
Max
Units
SpecID
tmem_clk
MEM_CLK period
7.5
ns
A5.8
tvalid
Control Signals, Address and MBA Valid
after rising edge of MEM_CLK
—tmem_clk*0.5+0.4
ns
A5.9
thold
Control Signals, Address and MBA Hold after
rising edge of MEM_CLK
tmem_clk*0.5
ns
A5.10
DMvalid
DQM valid after rising edge of MEM_CLK
tmem_clk*0.25+0.4
ns
A5.11
DMhold
DQM hold after rising edge of Mem_clk
tmem_clk*0.25-0.7
ns
A5.12
datavalid
MDQ valid after rising edge of MEM_CLK
tmem_clk*0.75+0.4
ns
A5.13
datahold
MDQ hold after rising edge of MEM_CLK
tmem_clk*0.75-0.7
ns
A5.14
MEM_CLK
Control Signals
MDQ (Data)
MA (Address)
NOTE: Control Signals are composed of RAS, CAS, MEM_WE, MEM_CS, MEM_CS1 and CLK_EN
Active
NOP
WRITE
NOP
thold
Row
Column
MBA (Bank Selects)
datahold
datavalid
tvalid
thold
tvalid
thold
tvalid
DQM (Data Mask)
DMvalid
DMhold
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