Add Board documentation for Matek F405-CTR
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# Board - Matek F405-CTR
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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`
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## Hardware Specs
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### FC Specs
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* *MCU:* 168MHz STM32F405 with IMU: MPU6000 accelerometer/gyro (SPI)
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* *Baro:* BMP280 (I2C)
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* *OSD:* BetaFlight OSD w/ AT7456E chip
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* *Blackbox:* MicroSD card slot (SD/SDHC)
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* 5 UART TX/RX pairs
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* Built in inverter for SBUS (`UART2-RX`)
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* SoftSerial on `TX2`, `S5` or `S6` optional
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* Camera control on `S6` or `DAC` optional
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* Smartaudio & Tramp VTX protocol supported
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* *WS2812 LED pad:* Yes
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* *Beeper pad:* Yes
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* *RSSI pad:* Yes
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### Integrated PDB Specs
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* *Input:* 6-30V (3-6S LiPo) w/TVS protection
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* *PDB:* Rated 4x30A per ESC pad set (Max. 4x46A burst)
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* *BEC:* 5V 2A continuous load (Max. 3A burst)
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* *LDO:* 3.3V: Max load: 300mA for Spektrum RX
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* *Current Sensor:* Rated for 184A (*Suggested scale value `179`*)
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* *Battery Voltage Sensor:* 1:10 (*Suggested scale value `110`*)
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## Pinout
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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.
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```
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__________
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/ U U \
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/-----------------------------\
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|oE Eo|
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|SC SC|
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| |
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| P P |
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| A A |
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| D D |
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| S S |
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|ES ES|
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|oC Co|
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\------------[USB]------------/
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```
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| Pad Silkscreen Label | Function | Notes |
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|---------------------:|---------------|:-----------------------------------------------------------------------------------------------|
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| `+ / -` | Battery | 6-30VDC LiPo Power input |
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| `S1-S6` | ESC Out | (1-4 near ESC power connections, 5-6 on front) Supports PWM, Oneshot, Multishot, DSHOT |
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| `5V, GND, S1-S4` | ESC Out | (Rear of board) 4-in-1 ESC Out |
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| `VBT, GND` | VBT Out | Marked for VTX OSD, but could be used for whatever |
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| `CURR` | Current Sense | Current Sensor I/O pin (output from onboard sensor or input from external sensor) |
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| `5V` | | Out from internal 5V BEC (rated 2A continuous, 3A burst) |
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| `3V3` | | Out from 3V3 regulator (rated 300mA) |
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| `4V5` | | Out from 4V4~4V8 regulator (unknown rating, power is also supplied when connected via USB) |
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| `G` | GND | |
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| `LED` | WS2812 Signal | |
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| `Bz-, 5V` | Buzzer | |
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| `Rssi` | RSSI | FrSky RSSI input from RX |
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| `G, 3V3, SDA, SLC` | I2C | (Rear of board) I2C connection marked for a magnetometer but could be used for whatever |
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| `VTX, Cam, DAC` | VTX/CAM | VTX: Video out, Cam: Video in, DAC: Cam control pin (since BF3.3) |
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| `RX1, TX1` | UART1 | |
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| `RX2` | UART2-RX | RX connection for Spektrum DSMX or DSM2, FlySky iBUS, or PPM |
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| `Sbus` | SBUS (UART2) | Dedicated pad for SBUS (duplicate pad of RX2 with signal inverter) |
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| `RX3, TX3` | UART3 | |
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| `RX4, TX4` | UART4 | |
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| `RX5, TX5` | UART5 | |
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| `RX5` | UART5-RX | (4x, one near each board corner) Duplicates of RX5 pin for ESC Telemetry |
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