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Jumper T12 Hardware Connections
The following documents the hardware inside the Jumper T12 transmitter
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LCD Display: 128×64 B&W display
Radio: Jumper 4-in-1 module plugged into the back of the transmitter
Digital volume control: CAT5137 on i2c BUS
256kbit EEPROM: ST M24256
STM32 Connections
GPIOA
Pin | Description |
*0 | Stick RV |
*1 | Stick RH |
*2 | Stick LV |
*3 | Stick LH |
4 | Audio DAC (???) |
*5 | Switch B_H |
*6 | POT1 |
7 | PPM for external module |
*8 | Trainer plug detect |
9 | USB Vin |
*10 | Int Module TX |
11 | USB Data- |
12 | USB Data+ |
13 | SWDIO (Pads on P12.2) |
*14 | PCBREV(???) |
*15 (SPI3 CS) | LCD C/S |
GPIOB
Pin | Description |
*0 | POT2 |
*1 | LED Blue |
*2 | S.Port Update PWR |
3 | Switch E- |
4 | Switch E+ |
5 | Switch A+ |
6 (I2C SCL) | EEPROM SCL(???) |
7 (I2C SDA) | EEPROM SDA(???) |
*8 | Haptic |
9 (I2C WP) | EEPROM WP(???) |
*10 | Bluetooth Tx |
*11 | Bluetooth Rx |
*12 (SPI2 CS) | Bluetooth Enable |
13 (SPI2 SCK) | SD Card SCK |
14 (SPI2 MISO) | SD Card MISO |
15 (SPI2 MOSI) | SD Card MOSI |
GPIOC
Pin | Description |
*0 | Voltage detect |
1 | Button 'Trim LHR' |
*2 | Buttom 'Trim RVU' |
*3 | Buttom 'Trim RVD' |
*4 | LED Green |
*5 | LED Red |
*6 | Int Module PWR |
7 | Heartbeat (???) |
*8 | Trainer PPM In |
*9 | Trainer PPM Out |
*10 (SPI3 SCK) | I2S_Audio SCK(???) |
*11 | LCD A0 |
*12 (SPI3 SD) | I2S_Audio SD(???) |
13 | Buttom 'Trim RH +' |
14 | XTAL |
15 | XTAL |
GPIOD
Pin | Description |
0 | Power shutdown |
1 | Power switch postition |
*2 | Button 'Exit' |
*3 | Button 'Page' |
4 | Sport Enable(???) |
5 | Sport Tx(???) |
6 | Sport Rx(???) |
*7 | Button 'Menu' |
8 | ??? |
9 | SD Card Detect |
10 | LCD MOSI |
*11 | Switch: C_11 |
*12 | LCD RST |
*13 | LCD Backlight |
*14 | Switch H |
*15 | Trim LHL |
GPIOE
Pin | Description |
*0 | Switch C_H |
*1 | Switch D_L |
*2 | Switch D_H |
*3 | Button 'Trim RHL' |
*4 | Button 'Trim RHR' |
*5 | Button 'Trim LVU' |
*6 | Button 'Trim LVD' |
*7 | Switch A_L |
8 | Switch G- |
*9 | Button 'Plus' |
*10 | Button 'Enter' |
*11 | Button 'Minus' |
12 | Button 'Minus' |
*13 | Switch A_H |
14 | Switch F |
*15 | Switch B_L |
Pad P12
Pin | Description |
1 | 3.3V |
2 | PA13 |
3 | PA14 |
4 | GND |
Externaml PPM Module (Pin 1 at bottom)
Pin | Description |
1 | SPORT |
2 | GND |
3 | ??? |
4 | Heartbeat |
5 | ??? |
FCC Report