T
T
TS
S
S2
2
2G
G
GS
S
SD
D
D1
1
15
5
50
0
0
2GB 150x Secure Digital Card
Transcend Information Inc.
12
• 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