M10 Hardware Design
M10_HD_V3.0 - 64 -
Table 26: Pin name of the SD card and T-Flash(Micro SD) card
In SD card interface designing, in order to ensure good communication performance with SD card,
it should be complied with following design principles.
Route SD card signals as short as possible. Ensure the length of trace do not exceed 20mm.
In order to offer good ESD protection, it is recommended to add TVS on signals with the
capacitance is less than 15pF.
Reserve external pull-up resistor for other data lines except the DATA0.
The SD_CLK and SD_DATA line must be shielded by GND in order to avoid interference.
The SD_CLK and SD_DATA and SD_CMD trace should be routed together and keep each
trace as close as possible.
Pin NO. Pin name of SD card Pin name of T-Flash(Micro SD) card
1 CD/DATA3 DATA2
2 CMD CD/DATA3
3 VSS1 CMD
4 VCC VCC
5 CLK CLK
6 VSS2 VSS
7 DATA0 DATA0
8 DATA1 DATA1
9 DATA2
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