Rainbow Electronics AT89C5132 - Manual (Page 149)

149
AT8xC5132
4173A–8051–08/02
Specific Controller To be defined.
MMC Interface
Definition of Symbols Table 137. MMC Interface Timing Symbol Definitions
Timings Table 138. MMC Interface AC timings
V
DD
= 2.7 to 3.3V, T
A
= 0 to 70
°
C, CL
≤
100pF (10 Cards)
Waveforms Figure 127. 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X No Longer Valid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