T
T
T
S
S
S
2
2
2
G
G
G
U
U
U
S
S
S
D
D
D
-
-
-
P
P
P
3
3
3
2GB microSD Card + Reader P3
Transcend Information Inc.
5
•
Bus Timing
Parameter
Symbol
Min
Max.
Unit
Remark
Clock CLK (All values are referred to min (V
IH
) and max (V
IL
)
Clock frequency Data Transfer Mode
f
PP
0
25
MHz
C
L
≤
100 pF, (7 cards)
Clock frequency Identification Mode
(The low freq. is required for MultiMediaCard
compatibility.)
f
OD
0
400
KHz
C
L
≤
250 pF, (21 cards)
t
WL
10
ns
C
L
≤
100 pF, (7 cards)
Clock low time
50
ns
C
L
≤
250 pF, (21 cards)
t
WH
10
ns
C
L
≤
100 pF, (7 cards)
Clock high time
50
ns
C
L
≤
250 pF, (21 cards)
t
TLH
10
ns
C
L
≤
100 pF, (7 cards)
Clock rise time
50
ns
C
L
≤
250 pF, (21 cards)
t
THL
10
ns
C
L
≤
100 pF, (7 cards)
Clock fall time
50
ns
C
L
≤
250 pF, (21 cards)
Inputs CMD, DAT (referenced to CLK)
Input set-up time
t
ISU
5
ns
C
L
≤
25 pF, (1 cards)
Input hold time
t
IH
5
ns
C
L
≤
25 pF, (1 cards)
Outputs CMD, DAT (referenced to CLK)
Output Delay time
t
ODLY
0
14
ns
C
L
≤
25 pF, (1 cards)
