T
T
T
S
S
S
4
4
4
G
G
G
-
-
-
3
3
3
2
2
2
G
G
G
S
S
S
D
D
D
H
H
H
C
C
C
6
6
6
-
-
-
P
P
P
2
2
2
SDHC Memory Card + Reader P2
Transcend Information Inc.
6
•
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
CARD
≤
10 pF, (1 card)
Clock frequency Identification Mode
f
OD
0
(1)
/100
400
KHz
C
CARD
≤
10 pF, (1 card)
Clock low time
t
WL
10
ns
C
CARD
≤
10 pF, (1 card)
Clock high time
t
WH
10
ns
C
CARD
≤
10 pF, (1 card)
Clock rise time
t
TLH
10
ns
C
CARD
≤
10 pF, (1 card)
Clock fall time
t
THL
10
ns
C
CARD
≤
10 pF, (1 card)
Inputs CMD, DAT (referenced to CLK)
Input set-up time
t
ISU
5
ns
C
CARD
≤
10 pF, (1 card)
Input hold time
t
IH
5
ns
C
CARD
≤
10 pF, (1 card)
Outputs CMD, DAT (referenced to CLK)
