Transcend Information TS2GUSD-P3 manual Bus Timing

TS2GUSD-P3 2GB microSD Card + Reader P3

•Bus Timing

Parameter

Symbol

Min

Max.

Unit

Remark

Clock CLK (All values are referred to min (VIH) and max (VIL)

Clock frequency Data Transfer Mode	fPP	0		25		MHz	CL ≤ 100 pF, (7 cards)
Clock frequency Identification Mode	fOD	0		400		KHz	CL ≤ 250 pF, (21 cards)
(The low freq. is required for MultiMediaCard
compatibility.)
Clock low time	tWL	10				ns	CL ≤ 100 pF, (7 cards)
		50				ns	CL ≤ 250 pF, (21 cards)
Clock high time	tWH	10				ns	CL ≤ 100 pF, (7 cards)
		50				ns	CL ≤ 250 pF, (21 cards)
Clock rise time	tTLH			10		ns	CL ≤ 100 pF, (7 cards)
				50		ns	CL ≤ 250 pF, (21 cards)
Clock fall time	tTHL			10		ns	CL ≤ 100 pF, (7 cards)
				50		ns	CL ≤ 250 pF, (21 cards)
Inputs CMD, DAT (referenced to CLK)
Input set-up time	tISU	5				ns	CL ≤ 25 pF, (1 cards)
Input hold time	tIH	5				ns	CL ≤ 25 pF, (1 cards)
Outputs CMD, DAT (referenced to CLK)
Output Delay time	tODLY		0		14	ns	CL ≤ 25 pF, (1 cards)

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