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T
S
1
~
2
G
U
T
S
1
~
2
G
U
T
S
1
~
2
G
U
Bus Operating Conditions
• General
Parameter
Peak voltage on all lines
All Inputs
Input Leakage Current
All Outputs
Output Leakage Current
• Power Supply Voltage
Parameter
Supply voltage
Supply voltage specified in OCR register
Supply voltage differentials (V
Power up time
Note. The current consumption of any card during the power-up procedure must not exceed 10 mA.
•
Bus Signal Line Load
The total capacitance C
capacitance C
itself and the capacitance C
BUS
+ Ν*C
C
= C
+ C
L
HOST
BUS
Where N is the number of connected cards. Requiring the sum of the host and bus capacitances not to exceed 30 pF for
up to 10 cards, and 40 pF for up to 30 cards, the following values must not be exceeded:
Parameter
Bus signal line capacitance
Single card capacitance
Maximum signal line inductance
Pull-up resistance inside card (pin1)
Note that the total capacitance of CMD and DAT lines will be consist of C
connected separately to the SD Memory Card host.
Parameter
Pull-up resistance
Bus signal line capacitance
Transcend Information Inc.
S
D
-
S
3
S
D
-
S
3
S
D
-
S
3
Symbol
Symbol
, V
)
SS1
SS2
the CLK line of the SD Memory Card bus is the sum of the bus master capacitance C
L
CARD
CARD
Symbol
C
R
Symbol
R
CMD
Min.
Max.
-0.3
VDD+0.3
-10
-10
Min.
Max.
V
2.0
DD
-0.3
250
of each card connected to this line:
Min.
Max.
C
100
L
CARD
10
DAT3
Min.
Max.
, R
10
100
DAT
C
250
L
3
microSD Memory Card + Reader S3
Unit
V
10
µA
10
µA
Unit
3.6
V
CMD0, 15,55,ACMD41
commands
Except CMD0, 15,55,
ACMD41 commands
0.3
V
ms
From 0v to V
Unit
≤ 20 MHz, 7 cards
pF
f
PP
10
pF
≤ 20 MHz
16
nH
f
PP
90
KΩ
May be used for card
detection
, C
and one C
HOST
BUS
Unit
KΩ
To prevent bus floating
≤ 5 MHz, 21 cards
pF
f
PP
Remark
Remark
Min.
DD
, the bus
HOST
Remark
only since they are
CARD
Remark
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