Transcend TS4GSDHC6 Datasheet download pdf (Page 5)

4GB~8GB High Capacity Secure Digital Card

Transcend Information Inc.

Single card capacitance C

CARD

10 pF

Maximum signal line inductance 16 nH f

≤ 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

=40 pF). The SD Memory Card guarantees its bus timing when total bus capacitance is less than

maximum value of C

(40 pF).

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Transcend TS4GSDHC6 Datasheet Page 5