# Board - Matek F722-SE

Full details on the MATEKSYS F722-SE can be found on the Matek Website: [mateksys.com/?portfolio=f722-se](http://www.mateksys.com/?portfolio=f722-se). INAV Target: `MATEKF722SE`

## Hardware Specs

* *Mass:* ~10g
* *PCB Size:* 36x46mm
  * 30x30mm Hole pattern (M4 size, M3 size with rubber isolators)

### FC Specs

* Processors and Sensors
  * *MCU:* STM32F722RET6
  * *IMU:* MPU6000(Gyro1) & ICM20602(Gyro2) connected via SPI1
  * *Baro:* BMP280 (connected via I2C1)
  * *OSD:* BetaFlight OSD (AT7456E connected via SPI2)
* *Blackbox:* MicroSD card slot (connected via SPI3)
* 5 UARTs
* 8 PWM/Dshot outputs
* 2 PINIO definition (VTX power switcher/user1 and 2 camera switcher/user2)

### Integrated PDB Specs

* *Input:* 6-36v (2-8S LiPo) w/TVS protection
* *ESC Pads:* Rated 4x30A per ESC pad set (4x46A burst)
* Voltage Regulators:
  * *5v BEC:* 2A continuous load (3A burst)
  * *3.3v LDO:* max load: 200mA
* Power Sense:
  * *Current Sensor:* Rated for 184A (*Suggested scale value `179`*)
  * *Voltage Sensor:* 1:10 signal output ratio (*Suggested scale value `110`*)

## Status LEDs

|       LED      | Color |                                         Color Codes                                                       |
|---------------:|-------|:----------------------------------------------------------------------------------------------------------|
| FC Status      | Blue  | **Unlit:** USB disconnected and disarmed, <br> **Lit:** USB disconnected and armed, <br> **Flashing:** USB connected and disarmed, <br> **5x Rapid Flash then Flashing:** USB connected and arming command prevented |
| Accelerometer  | Green | Accelerometer status (Lit: active, Unlit: inactive)                                                       |
| 3v3 Status     | Red   | Red: active, Unlit: inactive                                                                              |

## Pinout

Pads are organised into two large banks of pads on left and right sides of board with a couple sets of pads on the underside of the board and ESC related connections near the board corners.

```
          __________
         /  U    U  \
/-----------------------------\
|oE                         Eo|
|SC                         SC|
|                             |
| P                        P  |
| A                        A  |
| D                        D  |
| S                        S  |
|                             |
|ES                         ES|
|oC                         Co|
\------------[USB]------------/
```


| Pad Silkscreen Label |   Function    |                                                 Notes                                          |
|---------------------:|---------------|:-----------------------------------------------------------------------------------------------|
| `+ / -`              | Battery In    | 6-30vDC LiPo Power input (*Battery +/- and 4-in-1 ESC +/- pads*)                               |
| `S1-S8`              | ESC Out       | (*1-4 near ESC power connections, 5-8 on right side*) Supports PWM, Oneshot, Multishot, DSHOT  |
| `GND, S1-S4`         | ESC Out       | (*Rear of board*) 4-in-1 ESC Out                                                               |
| `VBT, GND`           | VBT Out       | VBAT power pad (*marked for VTX*), power ON/OFF can be switched via PINIO1(PC8)                |
| `CURR`               | Current Sense | Current Sensor I/O pin (*output from onboard sensor or input from external sensor*)            |
| `5V`                 |               | Out from internal 5v BEC (*rated 2A continuous, 3A burst*)                                     |
| `3V3`                |               | Out from 3v3 regulator (*rated 200mA*)                                                         |
| `4V5`                |               | Out from 4v4~4v8, 0.5A (*power is also supplied when connected via USB*)                       |
| `G`                  | GND           |                                                                                                |
| `LED`                | WS2812 Signal |                                                                                                |
| `Bz-, 5V`            | Buzzer        |                                                                                                |
| `CL, DA`             | I2C           | I2C connection marked for a magnetometer but could be used for whatever                        |
| `VTX`                | VTX           | VTX: Video out                                                                                 |
| `C1/C2`              | Camera        | C1: camera-1 IN,  C1: camera-2 IN,  2 camera image can be switched via PINIO2(PC9)             |
| `RX1, TX1`           | UART1         |                                                                                                |
| `TX2`                | UART2-TX      |                                                                                                |
| `RX2`                | UART2-RX      | RX connection for Spektrum DSMX or DSM2, FlySky iBUS, or PPM (*Disable `UART2` for PPM*)       |
| `RX3, TX3`           | UART3         | TX3 can be used for VTX control                                                                |
| `RX4, TX4`           | UART4         | RX4 pin  `PA1` can be used for camera control(PWM)                                             |
| `TX6`                | UART6-TX      |                                                                                                |
| `RX6`                | UART6-RX      | (*One per board corner*) Duplicates of RX6 pad for ESC Telemetry                               |
| `Rssi`               | RSSI          | FrSky RSSI input from RX (*Rear of board*)                                                     |
| `PA4 `               | ADC/DAC       | Airspeed_ADC_PIN (*Rear of board*)                                                            |
| `D+, D-. VBus`       | USB pins      | (*Rear of board*)                                                                              |