TS256M~2GUSD
•
Bus Timing
microSD Memory Card
Parameter
Clock frequency Data Transfer Mode
Clock frequency Identification Mode
(The low freq. is required for MultiMediaCard
compatibility.)
Clock low time
Clock high time
Clock rise time
Clock fall time
Inputs CMD, DAT (referenced to CLK)
Input set-up time
Input hold time
Outputs CMD, DAT (referenced to CLK)
Output Delay time
Symbol
f
PP
f
OD
Min
0
0
Max.
25
400
Unit
MHz
KHz
Remark
C
L
≤
100 pF, (7 cards)
C
L
≤
250 pF, (21 cards)
Clock CLK (All values are referred to min (V
IH
) and max (V
IL
)
t
WL
t
WH
t
TLH
t
THL
10
50
10
50
10
50
10
50
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
14
ns
C
L
≤
100 pF, (7 cards)
C
L
≤
250 pF, (21 cards)
C
L
≤
100 pF, (7 cards)
C
L
≤
250 pF, (21 cards)
C
L
≤
100 pF, (7 cards)
C
L
≤
250 pF, (21 cards)
C
L
≤
100 pF, (7 cards)
C
L
≤
250 pF, (21 cards)
C
L
≤
25 pF, (1 cards)
C
L
≤
25 pF, (1 cards)
C
L
≤
25 pF, (1 cards)
t
ISU
t
IH
t
ODLY
5
5
5
0
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