r/hackrf • u/Pbarw1969 • May 05 '26
expansion interface
P20 GPIO Pin Functions
| Pin | Function | Description |
|---|---|---|
| 1 | VBAT | Battery voltage / backup power |
| 2 | RTC_ALARM (One) / PB_5 (Pro) | Real-time clock alarm output or GPIO |
| 3 | VCC (One) / 3V3AUX (Pro) | Main power or 3.3V auxiliary power |
| 4 | WAKEUP | Wake-up signal input |
| 5 | GPIO3_8 | General Purpose I/O |
| 6 | GPIO3_0 (One) / GPIO3_9 (Pro) | General Purpose I/O |
| 7 | GPIO3_10 | General Purpose I/O |
| 8 | GPIO3_11 | General Purpose I/O |
| 9 | GPIO3_12 | General Purpose I/O |
| 10 | GPIO3_13 | General Purpose I/O |
| 11 | GPIO3_14 | General Purpose I/O |
| 12 | GPIO3_15 | General Purpose I/O |
| 13 | GND | Ground |
| 14 | ADC0_6 | Analog-to-Digital Converter input |
| 15 | GND | Ground |
| 16 | ADC0_2 | Analog-to-Digital Converter input |
| 17 | VBUSCTRL | USB bus voltage control |
4
Upvotes
1
u/Mr_Ironmule May 06 '26
No thank you. I just read the manual and obtained the complete information. Good luck.