Transcend Information Secure Digital Card SD80 - Manual (Page 5)

S S S D D D 8 8 8 0 0 0 s s s e e e r r r i i i e e e s s s
Rev1.2
SD80 Secure Digital Card
Transcend Information Inc. 5
• Bus Timing (Default)
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)
Clock rise time t
TLH
10 ns C
L
≤ 100 pF, (7 cards)