參數(shù)資料
型號: OMAP5910(DSP)
英文描述: Dual-Core Processor
中文描述: 雙核處理器
文件頁數(shù): 149/160頁
文件大?。?/td> 1997K
代理商: OMAP5910(DSP)
Electrical Specifications
137
August 2002 Revised August 2003
SPRS197B
5.13 Multimedia Card/Secure Digital (MMC/SD) Timings
Table 528 and Table 529 assume testing over recommended operating conditions (see Figure 529
through Figure 532).
Table 528. MMC/SD Timing Requirements
NO.
MIN
MAX
UNIT
M1
tsu(CMDVCLKH)
th(CLKHCMDV)
tsu(DATVCLKH)
th(CLKHDATV)
Setup time, MMC.CMD valid before MMC.CLK high
12
ns
M2
Hold time, MMC.CMD invalid after MMC.CLK high
2
ns
M3
Setup time, MMC.DATx valid before MMC.CLK high
12
ns
M4
Hold time, MMC.DATx invalid after MMC.CLK high
2
ns
Table 529. MMC/SD Switching Characteristics
NO.
PARAMETER
MIN
41.7
MAX
UNIT
ns
M7
tc(CLK)
Cycle time, MMC.CLK
5.31
us
M8
tw(CLKH)
tw(CLKL)
td(CLKHCMD)
td(CLKHDAT)
Pulse Duration, MMC.CLK high
20
20
ns
M9
Pulse Duration, MMC.CLK low
ns
M10
Delay time, MMC.CLK high to MMC.CMD transition
4
48
ns
M11
Delay time, MMC.CLK high to MMC.DATx transition
4
48
ns
MMC.CLK period and pulse duration depends upon software configuration.
MMC.CLK
MMC.CMD
XMIT
Valid
M10
M10
M10
M10
Valid
Valid
Start
End
M9
M8
M7
Figure 529. MMC/SD Host Command Timings
MMC.CLK
MMC.CMD
M7
XMIT
Valid
Valid
Valid
Start
End
M1
M1
M2
M9
M8
M2
Figure 530. MMC/SD Card Response Timings
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