Datasheet

T
T
T
S
S
S
2
2
2
5
5
5
6
6
6
M
M
M
~
~
~
2
2
2
G
G
G
U
U
U
S
S
S
D
D
D
microSD Memory Card
Transcend Information Inc.
6
• Bus Timing (High-speed Mode)
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 50 MHz C
CARD
≤ 10 pF, (1 card)
Clock low time t
WL
7 ns C
CARD
≤ 10 pF, (1 card)
Clock high time t
WH
7 ns C
CARD
≤ 10 pF, (1 card)
Clock rise time t
TLH
3 ns C
CARD
≤ 10 pF, (1 card)
Clock fall time t
THL
3 ns C
CARD
≤ 10 pF, (1 card)
Inputs CMD, DAT (referenced to CLK)
Input set-up time t
ISU
6 ns C
CARD
≤ 10 pF, (1 card)
Input hold time t
IH
2 ns C
CARD
≤ 10 pF, (1 card)
Outputs CMD, DAT (referenced to CLK)
Output Delay time during Data Transfer Mode t
ODLY
14 ns C
L
≤ 40 pF, (1 card)
Output Hold time t
OH
2.5 ns C
L
≤ 40 pF, (1 card)
Total System capacitance for each line
1
C
L
40 pF (1 card)
1) In order to satisfy severe timing, host shall drive only one card.