User's Manual

11
I2C*4
For sensors/TP/others
SPI*1
Master only
ADC*2
Support
Charging
function
Built-in 5V/1.44A, support external charging
chip
Motor
Support
GPIO
17
VCOIN
Real-time clock backup battery
RF PIN
Multimode LTE main antenna
Multimode LTE diversity antenna
The GPS antenna
2.4 G WiFi/BT antenna
Audio
2-way single-ended MIC （ ECM&MEMS ） ,1
way headphone MIC
1 way speakerphone (with amplifier)
1 way earpiece
1 channel stereo headset