Matek F405-CTR

Full details on the Matek Sys F405-CTR can be found on the Matek Website: 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
  • IMU: MPU6000 (connected via SPI)
  • Baro: BMP280 (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, Lit: USB disconnected and armed, Flashing: USB connected and disarmed, 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