MCU pin maps
| PA0 | J2 | steering ADC |
| PA1 | J3 | throttle ADC |
| PA2 | R1 | (st trim) ADC |
| PA3 | R2 | (th trim)ADC |
| PA4 | RF signal | Sawtooth signal (ADC) |
| PA5 | R3 | (st rate) ADC |
| PA6 | Vbat | (ADC) |
| PA7 | CYRF / RF | cut trace and connect 3 pos AUX SW |
| PA8 | CYRF IRQ | cut trace and use as LED2 |
| PA9 | J4_TX1 | |
| PA10 | J4_RX1 | |
| PA11 | RF module TX_EN | |
| PA12 | RF module RX_EN | |
| PA13 | DBG_SWDIO | |
| PA14 | DBG_SWCLK | |
| PA15 | RF module SPI_SS | |
| PB0 | RF module RST | |
| PB1 | Power_off_bypass | |
| PB2 | S2 | bind button |
| PB3 | RF module SPI_SCK | |
| PB4 | RF module SPI_MISO | |
| PB5 | RF module SPI_MOSI | |
| PB6 | D1 | LED |
| PB7 | S3 | th direction |
| PB8 | S4 | st direction |
| PF0/OSC_IN | RF module XOUT | |
| PF1/OSC_OUT | TP3 |
CYRF STUFF
| SPI_SS | 24 |
| SPI_SCK | 25 |
| IRQ | 26 |
| MOSI | 27 |
| MISO | 28 |
| XOUT | 29 |
| PACTL | 30 |
| RST | 34 |
J4
- VDD
- GND
- TX
- RX
- BOOT0
- NRST
DEBUG
- VDD
- GND
- GND
- N/C
- GND
- NRST
- N/C
- N/C
- SWCLK
- SWDIO