Transcend Information miniSDHC Card Series - Manual (Page 6)

m m m i i i n n n i i i S S S D D D H H H C C C C C C a a a r r r d d d s s s e e e r r r i i i e e e s s s
4GB High Capacity miniSD Card
Transcend Information Inc. 6
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 k Ω 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).