| microSD Memory Card + Reader S3 | |
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Bus Operating Conditions
• General
Parameter | Symbol | Min. | Max. | Unit |
Peak voltage on all lines |
| VDD+0.3 | V | |
All Inputs |
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Remark
Input Leakage Current |
| 10 | µA | |
All Outputs |
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Output Leakage Current
10
µA
• Power Supply Voltage
Parameter | Symbol | Min. | Max. | Unit |
Supply voltage | VDD | 2.0 | 3.6 | V |
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Supply voltage specified in OCR register |
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Supply voltage differentials (VSS1, VSS2) |
| 0.3 | V | |
Power up time |
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| 250 | ms |
Remark
CMD0, 15,55,ACMD41 commands
Except CMD0, 15,55, ACMD41 commands
From 0v to VDD Min.
Note. The current consumption of any card during the
•Bus Signal Line Load
The total capacitance CL the CLK line of the SD Memory Card bus is the sum of the bus master capacitance CHOST, the bus capacitance CBUS itself and the capacitance CCARD of each card connected to this line:
CL = CHOST + CBUS + Ν*CCARD
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 | Symbol | Min. | Max. | Unit |
Bus signal line capacitance | CL |
| 100 | pF |
Single card capacitance | CCARD |
| 10 | pF |
Maximum signal line inductance |
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| 16 | nH |
RDAT3 | 10 | 90 | KΩ | |
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Remark
fPP ≤ 20 MHz, 7 cards
fPP ≤ 20 MHz
May be used for card detection
Note that the total capacitance of CMD and DAT lines will be consist of CHOST, CBUS and one CCARD only since they are connected separately to the SD Memory Card host.
Parameter | Symbol | Min. | Max. | Unit |
RCMD, RDAT | 10 | 100 | KΩ | |
Bus signal line capacitance | CL |
| 250 | pF |
Remark
To prevent bus floating fPP ≤ 5 MHz, 21 cards
Transcend Information Inc. | 3 |
