| Pin Number |
Pin Name |
Description |
|---|---|---|
| 1,2,18,20,22, 24,39,40 |
GND | Ground |
| 3 | Audio R | Earphone (right) |
| 4,6,8 | Vcc | |
| 5 | Audio L | Earphone (left) |
| 7 | Audio GND | Earphone GND |
| 15 | USB D- | |
| 17 | USB D+ | |
| 19 | HOST USB D- | via double SMD resistor |
| 21 | HOST USB D+ | via double SMD resistor |
| 27 | UART TX | |
| 29 | UART RX | |
| 30 | SENSE | Pin to GND via R=10Ohm to switch charger from 5/7.5V to 15V |
| 31 | ? | Pinned to GND via capacitor in cable? |
| 33,35,37 | ? | Tied together and pinned to GND via capacitor |
Additional info:


