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T
T
T
S
S
S
4
4
4
G
G
G
-
-
-
1
1
1
6
6
6
G
G
G
S
S
S
D
D
D
H
H
H
C
C
C
6
6
6
-
-
-
S
S
S
5
5
5
W
W
W
SDHC Memory Card + Reader S5
Transcend Information Inc.
4
Single card capacitance C
CARD
10 pF
Maximum signal line inductance 16 nH f
PP
≤ 20 MHz
Pull-up resistance inside card (pin1) R
DAT3
10 90 kΩ May be used for card
detection
Note that the total capacitance of CMD and DAT lines will be consist of C
HOST
, C
BUS
and one C
CARD
only because they are
connected separately to the SD Memory Card host.
Host should consider total bus capacitance for each signal as the sum of C
HOST
, C
BUS
, and C
CARD
, these parameters are
defined by per signal. The host can determine C
HOST
and C
BUS
so that total bus capacitance is less than the card estimated
capacitance load (C
L
=40 pF). The SD Memory Card guarantees its bus timing when total bus capacitance is less than
maximum value of C
L
(40 pF).