Table of Contents

Devo 12E Hardware Connections

The following documents the hardware inside the Devo-12E transmitter

STM32 Connections

Pin Desription
BOOT0 CON2
NRST Debugger (NRESET)

GPIOA

Pin Desription
0 (ADC_IN_0) Aux6(?)
1 Buzzer
2 output to 0 to shut off Tx
3 power-switch in 'off' position (goes high on 'off')
4 (ADC_IN_4) AUX5
5 (SPI1_SCK) SPI Flash, TSC2008
6 (SPI1_MISO) SPI Flash, TSC2008
7 (SPI1_MOSI) SPI Flash, TSC2008
9 (USART1_TX) Trainer Rx?
10 (USART1_RX) Trainer Tx?
11 (USBDM) USB+
12 (USBDP) USB-
13 (SWDIO) Debugger SWDIO (TMS)
14 (SWCLK) Debugger SWCLK (TCK)

GPIOB

Pin Desription
0 (ADC_IN_8) Aux7
1 LCD Backlight
2 (BOOT1) SPI Flash Chip-Enable
4 Button Matrix Col 1
5 Button Matrix Col 2
8 Button Matrix Col 3
9 Button Matrix Col 4
10 USB Enable (enable Low)
11 TxModule pin 10 - CYRF6936 Reset
12 (SPI2_NSS?) TxModule pin 1
13 (SPI2_SCK?) TxModule pin 3
14 (SPI2_MISO?) TxModule pin 9
15 (SPI2_MOSI?) TxModule pin 7

GPIOC

Pin Desription
0 (ADC_IN_10) AUX4
1 (ADC_IN_11) Left Horizontal Stick
2 (ADC_IN_12) Right Horizontal stick
3 (ADC_IN_13) Right Vertical Stick
4 (ADC_IN_14) Battery Voltage
5 (ADC_IN_15) Left Vertical Stick
6 Gear Switch??
7 Elevator D/R Switch??
8 Rudder D/R Switch??
9 FMode 0 Switch??
10 FMode 2 Switch??
11 Aileron D/R Switch??
12 Mix 0 Switch??
13 Mix 2 Switch??

GPIOD

Pin Desription
0-1 LCD Module
2 ??? Push/Pull output default low
4-5 LCD Module
9 ??? (pinned out but floating?)
10 LCD Module
14-15 LCD Module

GPIOE

Pin Desription
2 Button Matrix Row 1
3 Button Matrix Row 2
4 Button Matrix Row 3
5 Button Matrix Row 4
6 Button Matrix Row 5
7-15 LCD Module

GPIOF



The battery voltage (ADC1_14) is calculated by the formula:
V = 0.003246 * value + 0.4208

Button Matrix

B.6 B.7 B.8 B.9
E.2 L- DN- NC Elevator Trim Down
E.3 R+ UP+ Top Right TD Throttle Trim Up
E.4 Ent Ext Top Right TU Elevator Trim Up
E.5 Aileron TR Rudder TL Top Left TU NC
E.6 Aileron TL Rudder TR Top Left TD Throttle Trim Down

TL: Trim Left TR: Trim Right TU: Trim Up TD: Trim down

FCC Report

FCCID: S29DEVO12E https://fccid.io/S29DEVO12E#download