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T
T
T
S
S
S
4
4
4
G
G
G
-
-
-
3
3
3
2
2
2
G
G
G
S
S
S
D
D
D
H
H
H
C
C
C
6
6
6
-
-
-
P
P
P
2
2
2
SDHC Memory Card + Reader P2
Transcend Information Inc.
•
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 V
DD
of the allowed voltage range:
Parameter Symbol Min. Max. Unit Remark
Output HIGH voltage V
OH
0.75
*
V
DD
V I
OH
= -100 µA @V
DD
min
Output LOW voltage V
OL
0.125
*
V
DD
V I
OL
= -100 µA @V
DD
min
Input HIGH voltage V
IH
0.625
*
V
DD
V
DD
+ 0.3 V
Input LOW voltage V
IL
V
SS
– 0.3 0.25
*
V
DD
V