User's Manual

T
T
T
S
S
S
2
2
2
G
G
G
S
S
S
D
D
D
1
1
1
5
5
5
0
0
0
2GB 150x Secure Digital Card
Transcend Information Inc.
11
AC/DC Character
• General
Parameter Symbol Min. Max. Unit Remark
Peak voltage on all lines -0.3 VDD+0.3 V
All Inputs
Input Leakage Current -10 10 µA
All Outputs
Output Leakage Current -10 10 µA
• Power Supply Voltage
Parameter Symbol Min. Max. Unit Remark
Supply voltage V
DD
2.0 3.6 V CMD0, 15,55,ACMD41
commands
Supply voltage specified in OCR register 2.7 3.6 V Except CMD0, 15,55,
ACMD41 commands
Supply voltage differentials (V
SS1
, V
SS2
) -0.3 0.3 V
Power up time 250 ms From 0v to V
DD
Min.
• Bus Signal Line Load
The total capacitance C
L
the CLK line of the SD Memory Card bus is the sum of the bus master capacitance C
HOST
, the bus
capacitance C
BUS
itself and the capacitance C
CARD
of each card connected to this line:
C
L
= C
HOST
+ C
BUS
+ Ν*C
CARD
Parameter Symbol Min. Max. Unit Remark
Bus signal line capacitance C
L
100 pF f
PP
≤ 20 MHz, 7 cards
Single card capacitance C
CARD
10 pF
Maximum signal line inductance 16 nH f
PP
≤ 20 MHz
Pull-up resistance inside card (pin1) R
DAT3
10 90 kΩ May be used for card
detection
Note that the total capacitance of CMD and DAT lines will be consist of C
HOST
, C
BUS
and one C
CARD
only since they are
connected separately to the SD Memory Card host.
Parameter Symbol Min. Max. Unit Remark
Pull-up resistance R
CMD
, R
DAT
10 100 kΩ To prevent bus floating
Bus signal line capacitance C
L
250 pF f
PP
≤ 5 MHz, 21 cards