TS1GSDG Datasheet, PDF (3/7 Pages) Transcend Information. Inc. – Secure Digital Card

TS1G~2GSDG
Secure Digital Card
Bus Operating Conditions
• General
Parameter
Peak voltage on all lines
All Inputs
Input Leakage Current
All Outputs
Output Leakage Current
Symbol Min.
Max.
Unit
-0.3 VDD+0.3
V
-10
10
µA
-10
10
µA
Remark
• 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.
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_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
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)
Symbol
C_L
C_CARD
Min.
R_DAT3
10
Max.
100
10
16
90
Unit
Remark
pF f_PP ≤ 20 MHz, 7 cards
pF
nH f_PP ≤ 20 MHz
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
Pull-up resistance
Bus signal line capacitance
Symbol
R_CMD, R_DAT
C_L
Min.
10
Max.
100
250
Unit
Remark
kΩ To prevent bus floating
pF f_PP ≤ 5 MHz, 21 cards
Transcend Information Inc.
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