TM
64MB/128MB/256MB/512MB MultiMediaCard
3. Recommend Operating Conditions
Parameter
Supply voltage
Symbol
VCC
VIL
Min
2.7
Typ
Max
3.6
Unit
V
Remark
3.0
Inputs
Low-level input current
High-level input current
VSS-0.3
0.625VCC
-2
0.25VCC
VCC+0.3
V
VIH
V
Outputs High-level output current
Low-level output current
IOH
IOL
mA
mA
MHz
6
Clock
Clock frequency data
transfer mode (pp)
fpp
0
0
20
CL<100pF,(10 cards)
Input clk Clock frequency ident.
Mode (od)
fOD
400
KHz
ns
Clock cycle time data
transfer mode (pp)
Clock cycle time ident.
Mode (od)
Tpp =
1/fpp
tOD =
1/fOD
tWL
50
2.5
µs
Clock low time
10
10
ns
ns
CL<100pF,(10 cards)
CL<100pF,(10 cards)
CL<100pF,(10 cards)
CL<100pF,(10 cards)
CL<250pF,(30 cards)
CL<250pF,(30 cards)
CL<250pF,(30 cards)
CL<250pF,(30 cards)
Clock high time
tWH
tLH
Clock input rise time
Clock input fall time
Clock low time
10
10
ns
tHL
ns
tWL
50
50
ns
Clock high time
tWH
tLH
mA
mA
MHz
Clock input rise time
Clock input fall time
50
50
tHL
4. Recommend Bus Conditions
Parameter
Symbol
Min
4.7
50
Typ
Max
100
100
250
100
16
Unit
Remark
Clock
Pull-up resistance for CMD
RCMD
RDAT
CL
KΩ
KΩ
pF
To prevent bus floating
To prevent bus floating
fpp≦5MHz, 30 cards
fpp≦20MHz, 10 cards
fpp≦20MHz
Input clk Pull-up resistance for DAT
Bus signal line capacitance
pF
Maximum signal line inductance
nH
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