T
T
TS
S
S4
4
4G
G
G-
-
-1
1
16
6
6G
G
GS
S
SD
D
DH
H
HC
C
C6
6
6-
-
-S
S
S5
5
5W
W
W
SDHC Memory Card + Reader S5
Transcend Information Inc.
5
• 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 and JESD8-7, 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