User manual

HEADPHONE:
Pin # Signal Name
1-L Audio Left OUT
2-C GND
3-R Audio Right OUT
This is 3.5 mm Audio jack female connector and work with most standard 3.5 mm
jack headphones. Note the signal is Mono i.e. Left and Right channel info is same.
MIC:
Pin # Signal Name
1-L Audio Left IN
2-C GND
3-R Audio Right IN
This is standard 3.5 mm Audio jack female connector.
Note the signal is Mono i.e. Left and Right channels are connected together.
SD/MMC:
Pin # Signal Name Pin # Signal Name
1 CS_ 9 Pull-up to 3.3V
2 SDO_ 10 WP
3 GND 11 Not Connected
4 VDD 12 Not Connected
5 SCK_ 13 CP
6 GND 14 Pull-down
7 SDI_ 15 Pull-down
8 Pull-up to 3.3V
This is standard SD-MMC card connector,