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12048231 Rev. 00 (Draft)
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3.2. Micro-SD Socket
Reference designator: J40
Micro-SD connector; ultra-low-profile; push-push type
Description
The micro-SD ultra-low-profile, push-push type socket provides 4-bit SDIO interface of the SMARC module. The
SDIO performance is depended on used SMARC module platform.
Interfaces used
SDIO interface of the SMARC module
Connector drawing and contact-numbering scheme
Figure 4 Micro-SD Socket
– J40
Pinout
J40
Pin
Signal / Function
Pin Type
Signal Description
1
SDIO_DATA2
IO (1.8/3.3V)
Serial data line 2
2
SDIO_DATA3
IO (1.8/3.3V)
Serial data line 3
3
SDIO_CMD
IO (1.8/3.3V)
Command Line
4
VCC
Power(3.3V)
3.3V power-supply for connected device; max. current
100mA
5
SDIO_CLK
O (1.8/3.3V)
Data clock
6
GND
GND
Device power ground
7
SDIO_DATA0
IO (1.8/3.3V)
Serial data line 0
8
SDIO_DATA1
IO (1.8/3.3V)
Serial data line 1