Devo 12/12S Hardware Connections
The following documents the hardware inside the Devo-12/S transmitter
STM32 Connections
| Pin | Desription |
| BOOT0 | CON2 |
| NRST | Debugger (NRESET) |
GPIOA
| Pin | Desription |
| 0 | Backlight Enable |
| 1 | |
| 2 (ADC3_IN_2) | Right Vertical Stick |
| 3 (ADC3_IN_3) | Battery Voltage |
| 4 | Power-Switch Sense |
| 5 (SPI1_SCK) | SPI Flash, TSC2008 |
| 6 (SPI1_MISO) | SPI Flash, TSC2008 |
| 7 (SPI1_MOSI) | SPI Flash, TSC2008 |
| 8 | Trainer Out |
| 9 (USART1_TX) | |
| 10 (USART1_RX) | |
| 11 (USBDM) | USB+ |
| 12 (USBDP) | USB- |
| 13 (SWDIO) | Debugger SWDIO (TMS) |
| 14 (SWCLK) | Debugger SWCLK (TCK) |
| |
GPIOB
| Pin | Desription |
| 0 | Speaker |
| 1 | HX8257 SPI LCD Chip-Select |
| 2 (BOOT1) | SPI Flash Chip-Select |
| 3 | |
| 4 | Powered by Outlet (Active Low) |
| 5 | Button Matrix Row 1 |
| 6 | Button Matrix Row 2 |
| 7 | Button Matrix Row 3 |
| 8 | Button Matrix Row 4 |
| 9 | Button Matrix Row 5 |
| 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 (ADC3_IN_10) | Left Vertical Stick |
| 1 (ADC3_IN_11) | Left Horizontal Stick |
| 2 (ADC3_IN_12) | AUX 7 |
| 3 (ADC3_IN_13) | AUX 5 |
| 4 | TSC Chip-Select |
| 5 | TSC Pen/IRQ(?) |
| 6 | Button Matrix Column 1 |
| 7 | Button Matrix Column 2 |
| 8 | Button Matrix Column 3 |
| 9 | Button Matrix Column 4 |
| 10 | MIX0 Switch |
| 11 | GEAR Switch |
| 12 | MIX2 Switch |
| 13 | |
| 14 | |
| 15 | |
GPIOD
| Pin | Desription |
| 0 | FSMC Data |
| 1 | FSMC Data |
| 2 | AIL DR2 Switch |
| 3 | AIL DR0 Switch |
| 4 | FSMC_NOE |
| 5 | FSMC_NWE |
| 6 | |
| 7 | ELE DR2 Switch |
| 8 | FSMC Data |
| 9 | FSMC Data |
| 10 | FSMC Data |
| 11 | FSMC Address |
| 12 | FSMC Address |
| 13 | FSMC Address |
| 14 | FSMC Data |
| 15 | FSMC Data |
GPIOE
| Pin | Desription |
| 0 | Power OFF |
| 1 | Charging (Active Low) |
| 2 | |
| 3 | FSMC Address |
| 4 | FSMC Address |
| 5 | FSMC Address |
| 6 | FSMC Address |
| 7 | FSMC Data |
| 8 | FSMC Data |
| 9 | FSMC Data |
| 10 | FSMC Data |
| 11 | FSMC Data |
| 12 | FSMC Data |
| 13 | FSMC Data |
| 14 | FSMC Data |
| 15 | FSMC Data |
GPIOF
| Pin | Desription |
| 0 | FSMC Address |
| 1 | FSMC Address |
| 2 | FSMC Address |
| 3 | FSMC Address |
| 4 | FSMC Address |
| 5 | FSMC Address |
| 6 (ADC3_IN_4) | AUX 2 |
| 7 (ADC3_IN_5) | AUX 6 |
| 8 (ADC3_IN_6) | AUX 4 |
| 9 (ADC3_IN_7) | AUX 3 |
| 10 (ADC3_IN_8) | Right Horizontal Stick |
| 11 | FSMC Address |
| 12 | FSMC Address |
| 13 | FSMC Address |
| 14 | FSMC Address |
| 15 | FSMC Address |
GPIOG
| Pin | Desription |
| 0 | FSMC Address |
| 1 | FSMC Address |
| 2 | FSMC Address |
| 3 | FSMC Address |
| 4 | FSMC Address |
| 5 | FSMC Address |
| 6 | FMOD0 Switch |
| 7 | FMOD2 Switch |
| 8 | Trainer Switch |
| 9 | FSMC_NE2 |
| 11 | RUD DR2 Switch |
| 12 | FSMC_NE4 |
| 13 | RUD DR0 Switch |
| 14 | Hold Switch |
| 15 | ELE DR0 Switch |
The battery voltage (ADC3_3) is calculated by the formula:
V = 0.0021x + 0.3026
| | C.6 | C.7 | C.8 | C.9 |
| B.5 | NC | R+ | Top Left TU | Right Horiz TL |
| B.6 | UP+ | L- | Top Left TD | Right Vert TU |
| B.7 | DN- | Ent | Top Right TU | Right Horiz TR |
| B.8 | Ext | NC | Top Right TD | Right Vert TD |
| B.9 | Left Horiz TL | Left Horiz TR | Left Vert TD | Left Vert TU |
TL: Trim Left
TR: Trim Right
TU: Trim Up
TD: Trim down
FCC Report
