64MB/128MB/256MB/512MB Secure Digital Card
4.
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 V
DD
of the allowed
voltage range:
Parameter
Output HIGH voltage
Output LOW voltage
Input HIGH voltage
Input LOW voltage
Symbol
V
OH
V
OL
V
IH
V
IL
0.625*
V
DD
Min
0.75*
V
DD
0.125*
V
DD
V
DD
+0.3
0.25*
V
DD
Max
Unit
V
V
V
V
Remark
I
OH
=-100µA @V
DD
min
I
OL
=-100µA @V
DD
min
V
SS
-0.3
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