The following documents the hardware inside the Radiolink AT9 transmitter
| Pin | Connection | Description | Additional Info |
|---|---|---|---|
| BOOT0 | BOOT0 |
| Pin | Connection | Description | Additional Info |
|---|---|---|---|
| PA00 | CH1 | SRH RIght Hor Stick | |
| PA01 | CH2 | SLV Left Ver Stick | |
| PA02 | CH3 | SRV Right Ver Stick | |
| PA03 | CH4 | SLH Left Hor Stick | |
| PA04 | POT | Right Shoulder | |
| PA05 | POT | Left Front Dial | |
| PA06 | POT | Right Front Dial | |
| PA08 | K8H | 2-pos switch | RC filter |
| PA09 | TX | Boot connector | |
| PA10 | RX | Boot connector | |
| PA13 | LED Green | To cathode through limiting resistor | |
| PA14 | ENTER | Menu button | 1K resistor to GND |
| PA15 | EXIT | Menu button | 1K resistor to GND |
| Pin | Connection | Description | Additional Info |
|---|---|---|---|
| PB00 | POT | Left Shoulder | |
| PB01 | LOWBAT | Battery Voltage | |
| PB03 | TRL | Right Trim Left | |
| PB04 | TRR | Right Trim Right | |
| PB05 | TLU | Left Trim Up | |
| PB06 | TLD | Left Trim Down | |
| PB07 | PC OUT | PCM port | 4.7K limiting resistor |
| PB08 | PC IN | PCM port | 4.7K limiting resistor |
| PB09 | DISP24 | PWM for LEDs | Transistor to GND |
| PB11 | REST | RF board | |
| PB12 | CSN | RF board | |
| PB13 | SCK | RF board | |
| PB14 | MISO | RF board | |
| PB15 | MOSI | RF board |
| Pin | Connection | Description | Additional Info |
|---|---|---|---|
| PC00 | K1A | 2-pos switch | |
| PC01 | K2B | 2-pos switch | |
| PC02 | K3C1 | 3-pos switch | |
| PC03 | K3C2 | 3-pos switch | |
| PC04 | K5E1 | 3-pos switch | |
| PC05 | K5E2 | 3-pos switch | |
| PC06 | K4D | 2-pos switch | RC filter |
| PC07 | K6F | 2-pos switch | RC filter |
| PC08 | K7G1 | 3-pos switch | RC filter |
| PC09 | K7G2 | 3-pos switch | RC filter |
| PC10 | SDA | EEPROM | |
| PC11 | SCL | EEPROM | |
| PC12 | VIBRATOR | Transistor | |
| PC13 | ENC L | Rotary Encoder | 10K pull-up |
| PC14 | ENC R | Rotary Encoder | 10K pull-up |
| PC15 | ENC Button | Rotary Encoder | Direct to pin |
| Pin | Connection | Description | Additional Info |
|---|---|---|---|
| PD00 | DISP5 | Data | |
| PD01 | DISP6 | Data | |
| PD02 | TRU | Right Trim Up | |
| PD03 | TRD | Right Trim Down | |
| PD04 | DISP21 | Control | |
| PD05 | DISP22 | Control | |
| PD07 | DISP20 | Control | |
| PD06 | USB Detect | Detect USB Plugin | |
| PD08 | DISP16 | Data | |
| PD09 | DISP17 | Data | |
| PD10 | DISP18 | Data | |
| PD11 | DISP23 | Control | |
| PD12 | TLL | Left Trim to Left | |
| PD13 | TLR | Left Trim to Right | |
| PD14 | DISP3 | Data | |
| PD15 | DISP4 | Data |
| Pin | Connection | Description | Additional Info |
|---|---|---|---|
| PE00 | DISP19 | RESx ILI9341 Pin | Reset is Active low |
| PE01 | LED Red | To cathode through limiting resistor | |
| PE02 | BUZZER | Transistor | |
| PE07 | DISP7 | Data | |
| PE08 | DISP8 | Data | |
| PE09 | DISP9 | Data | |
| PE10 | DISP10 | Data | |
| PE11 | DISP11 | Data | |
| PE12 | DISP12 | Data | |
| PE13 | DISP13 | Data | |
| PE14 | DISP14 | Data | |
| PE15 | DISP15 | Data |
The battery voltage (ADC1_9) was measured as:
| Voltage | ADC Value |
|---|---|
| 15.05V | 0x0FFB |
| 10.02V | 0x0A9D |
| 4.31V | 0x048E |
is calculated by the formula: V = 0.003672 * value + 0.0287
FCCID: U2B RL039AT9