Transcend Information manual 128MB~2GB SD80 Cards Bus Signal Levels

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SD80 series

128MB~2GB SD80 Cards

•Bus Signal Levels

As the bus can be supplied with a variable supply voltage, all signal levels are related to the supply voltage.

To meet the requirements of the JEDEC specification JESD8-1A, the card input and output voltages shall be within the following specified ranges for any VDD of the allowed voltage range:

Parameter	Symbol	Min.	Max.	Unit	Remark
Output HIGH voltage	VOH	0.75* VDD		V	IOH = -100 μA @VDD min
Output LOW voltage	VOL		0.125* VDD	V	IOL = -100 μA @VDD min
Input HIGH voltage	VIH	0.625* VDD	VDD + 0.3	V
Input LOW voltage	VIL	VSS – 0.3	0.25* VDD	V

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Contents

Placement 128MB~2GB SD80 Cards Description FeaturesPin Definition 128MB~2GB SD80 Cards Architecture Power Supply Voltage Bus Signal Line LoadParameter Symbol Min Max Unit 128MB~2GB SD80 Cards Bus Operating Conditions General128MB~2GB SD80 Cards Bus Signal Levels Parameter Symbol Min Max Unit Remark128MB~2GB SD80 Cards Bus Timing Default 128MB~2GB SD80 Cards 128MB~2GB SD80 Cards Bus Timing High Speed Mode Reliability and Durability