Rainbow Electronics AT89C51SND1C - Manual (Page 195)

195
AT8xC51SND1C
4109E–8051–06/03
MMC Interface
Definition of symbols Table 168. MMC Interface Timing Symbol Definitions
Timings Table 169. MMC Interface AC timings
V
DD
= 2.7 to 3.3 V, T
A
= -40 to +85 ° C, CL ≤ 100pF (10 cards)
Waveforms Figure 151. MMC Input-Output Waveforms
Signals Conditions
C Clock H High
D Data In L Low
O Data Out V Valid
X No Longer Valid
Symbol Parameter Min Max Unit
T
CHCH
Clock Period 50 ns
T
CHCX
Clock High Time 10 ns
T
CLCX
Clock Low Time 10 ns
T
CLCH
Clock Rise Time 10 ns
T
CHCL
Clock Fall Time 10 ns
T
DVCH
Input Data Valid to Clock High 3 ns
T
CHDX
Input Data Hold after Clock High 3 ns
T
CHOX
Output Data Hold after Clock High 5 ns
T
OVCH
Output Data Valid to Clock High 5 ns
T
IVCH
MCLK
MDAT Input
T
CHCH
T
CLCX
T
CHCX
T
CHCL
T
CLCH
MCMD Input
T
CHIX
T
OVCH
MDAT Output
MCMD Output
T
CHOX