# Board - Matek F405-CTR

Full details on the Matek Sys F405-CTR can be found on the Matek Website: [mateksys.com/?portfolio=f405-ctr](http://www.mateksys.com/?portfolio=f405-ctr). Betaflight Target: `MATEKF405`

## Hardware Specs

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

### FC Specs

* Processors and Sensors
  * *MCU:* [STM32F405RGT6](http://www.st.com/content/ccc/resource/technical/document/datasheet/ef/92/76/6d/bb/c2/4f/f7/DM00037051.pdf/files/DM00037051.pdf/jcr:content/translations/en.DM00037051.pdf)
  * *IMU:* [MPU6000](https://www.invensense.com/wp-content/uploads/2015/02/MPU-6000-Datasheet1.pdf) (connected via SPI)
  * *Baro:* [BMP280](https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BMP280-DS001-19.pdf) (connected via I2C)
  * *OSD:* BetaFlight OSD (AT7456E IC)
* *Blackbox:* MicroSD card slot (SD/SDHC)
* 5 UARTs

### Integrated PDB Specs

* *Input:* 6-30v (3-6S 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: 300mA
* 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  | Red   | 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]------------/
```

> **NOTE:** Pads `TX2`, `S5` and `S6` support `softserial` and may be configured as such

> **NOTE:** Under normal operation, the use of the Barometer `I2C1` bus (internal) and the WS2812 `LED` signal pad are mutually exclusive due to a pad mapping conflict. However, the `LED_STRIP` feature may be remapped to the `S5` (`PA15`) pad to avoid this conflict.
>
> *I.e.* Type `resource LED_STRIP 1 A15` into the CLI.

| Pad Silkscreen Label |   Function    |                                                 Notes                                          |
|---------------------:|---------------|:-----------------------------------------------------------------------------------------------|
| `+ / -`              | Battery In    | 6-30vDC LiPo Power input (*Battery +/- and 4-in-1 ESC +/- pads*)                               |
| `S1-S6`              | ESC Out       | (*1-4 near ESC power connections, 5-6 on front*) Supports PWM, Oneshot, Multishot, DSHOT       |
| `5V, GND, S1-S4`     | ESC Out       | (*Rear of board*) 4-in-1 ESC Out                                                               |
| `VBT, GND`           | VBT Out       | VBAT power pad (*marked for VTX, but could be used for whatever*)                              |
| `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 300mA*)                                                         |
| `4V5`                |               | Out from 4v4~4v8 regulator (*unknown rating, power is also supplied when connected via USB*)   |
| `G`                  | GND           |                                                                                                |
| `LED`                | WS2812 Signal |                                                                                                |
| `Bz-, 5V`            | Buzzer        |                                                                                                |
| `Rssi`               | RSSI          | FrSky RSSI input from RX                                                                       |
| `G, 3V3, SDA, SLC`   | I2C           | (*Rear of board*) I2C connection marked for a magnetometer but could be used for whatever      |
| `VTX, Cam, DAC`      | VTX/CAM       | VTX: Video out, Cam: Video in, DAC: Cam control pin (*since BF3.3, may be resourced to `S6`*)  |
| `RX1, TX1`           | UART1         |                                                                                                |
| `TX2`                | UART2-TX      | May be reassigned to `softserial1` for use as FrSky SmartPort pad                              |
| `RX2`                | UART2-RX      | RX connection for Spektrum DSMX or DSM2, FlySky iBUS, or PPM (*Disable `UART2` for PPM*)       |
| `Sbus`               | SBUS (UART2)  | Dedicated pad for SBUS (*duplicate pad of `RX2` with signal inverter*)                         |
| `RX3, TX3`           | UART3         |                                                                                                |
| `RX4, TX4`           | UART4         |                                                                                                |
| `RX5, TX5`           | UART5         |                                                                                                |
| `RX5`                | UART5-RX      | (*One per board corner*) Duplicates of RX5 pad for ESC Telemetry                               |

### UARTs + VCP

| Port  | Default Assigned Role |
|------:|-----------------------|
| VCP   | microUSB Port         |
| UART1 | *Unassigned*          |
| UART2 | RX Connection         |
| UART3 | *Unassigned*          |
| UART4 | *Unassigned*          |
| UART5 | ESC Telemetry         |