Connectors

Table of contents

  1. Board Connections and Pin-out Specifications
    1. FMU Board Top
    2. FMU Board Bottom
  2. J1 - VOXL Communications Interface Connector
  3. J2 - Programming and Debug Connector
  4. J3 - USB2.0 FS Connector
  5. J4 - VOXL Spare Communications Interface Connector
  6. J5 - Telemetry Connector
  7. J6 - Expansion / Safety / VOXL-Power Management Input
  8. J7 - 8-Channel PWM Output Connector
  9. J8 - CAN Bus Connector
  10. J9 - PPM RC In
  11. J10 - External GPS & Magnetometer Connector
  12. J11 - MicroSD
  13. J12 - Spektrum UART Connector
  14. J13 - I2C Display / I2C2 Bus / Safety Switch Connector

Board Connections and Pin-out Specifications

FMU Board Top

FMU Core Top

Connector Summary  
J1 VOXL Communications Interface Connector (TELEM2)  
J2 Programming and Debug Connector  
J3 USB 2.0 Connector  
J4 VOXL Spare Communications Interface Connector (TELEM3)  
J5 Telemetry Connector (TELEM1)  
J6 Expansion / Safety / VOXL-Power Management Input  
J7 8-Channel PWM Output Connector  
J8 CAN Bus Connector  
J9 PPM RC In  
J10 External GPS & Magnetometer Connector  
J12 Spektrum UART Connector  
J13 I2C Display (Spare Sensor Connector) / Safety Button Input  

FMU Board Bottom

FMU Core Bottom

Top


J1 - VOXL Communications Interface Connector

Connector: 6 Position DF13, Vertical, DF13-6P-1.25V(50)

Notes: UART lines are 5V inputs (level shifted to 3.3V by the FMU)

Pin # Signal Name
1 5VDC (input or output if supplied at another pin)
2 UART_4W_RX_5V
3 UART_4W_TX_5V
4 UART_4W_RTS_5V
5 GND
6 UART_4W_CTS_5V

Top

J2 - Programming and Debug Connector

Connector: 8 Position, Vertical, BM08B-SRSS-TB(LF)(SN)

Pin # Signal Name
1 VREG_3V3
2 UART_2W_DEBUG_TX
3 UART_2W_DEBUG_RX
4 SWDIO
5 SWCLK
6 GND
7 !RESET
8 VPP_STM

Top

J3 - USB2.0 FS Connector

Connector: 4 Position JST GH, Vertical, BM04B-GHS-TBT

Pin # Signal Name
1 VBUS_IN
2 DATA_M
3 DATA_P
4 GND

Top

J4 - VOXL Spare Communications Interface Connector

Connector: 8 Position DF13, Vertical, DF13-8P-1.25V(50)

Pin # Signal Name
1 5VDC (other pins are 3.3V, input or output if supplied at another pin)
2 UART_4W_RX_3V3
3 UART_4W_TX_3V3
4 UART_4W_RTS_3V3
5 GND
6 UART_4W_CTS_3V3
7 GPIO (MSS Status Output)
8 GPIO (MSS Status Input)

Top

J5 - Telemetry Connector

Connector: 6 Position JST GH, Vertical, MB06B-GHS-TBT

Pin # Signal Name
1 5VDC (other pins 3.3V, input or output if supplied at another pin)
2 UART_4W_TX_3V3
3 UART_4W_RX_3V3
4 UART_4W_CTS_3V3
5 UART_4W_RTS_3V3
6 GND

Top

J6 - Expansion / Safety / VOXL-Power Management Input

Connector: 6 Position JST GH, Vertical, BM06B-GHS-TBT

Pin # Signal Name
1 5VDC (other pins 3.3V, input or output if supplied at another pin)
2 UART_2W_TX_3V3
3 UART_2W_RX_3V3
4 EXP_I2C_SCL
5 EXP_I2C_SDL
6 GND

Top

J7 - 8-Channel PWM Output Connector

Connector: 10 Position JST GH, Vertical, BM010B-GHS-TBT

Notes: 5V is for Ref Only

Pin # Signal Name
1 5VDC (other pins are 3.3V, input or output if supplied at another pin)
2 PWM_CH1
3 PWM_CH2
4 PWM_CH3
5 PWM_CH4
6 PWM_CH5
7 PWM_CH6
8 PWM_CH7
9 PWM_CH8
10 GND

J8 - CAN Bus Connector

Connector: 4 Position JST GH, Vertical, BM04B-GHS-TBT

Pin # Signal Name
1 5VDC (other pins are 3.3V, input or output if supplied at another pin)
2 CANH
3 CANL
4 GND

Top

J9 - PPM RC In

Connector: 3 Position JST GH, Vertical, BM03B-GHS-TBT

Pin # Signal Name
1 5VDC (other pins 3.3V, input or output if supplied at another pin)
2 PPM_IN
3 GND

Top

J10 - External GPS & Magnetometer Connector

Connector: 6 Positiom JST GH, Vertical, BM06B-GHS-TBT

Pin # Signal Name
1 5VDC (other pins 3.3V, input or output if supplied at another pin)
2 EXT_GPS_UART_2W_TX
3 EXT_GPS_UART_2W_RX
4 EXT_GPS_I2C_SCL
5 EXT_GPS_I2C_SDA
6 GND

Top

J11 - MicroSD

MicroSD slot. Information about supported cards is here: https://dev.px4.io/v1.9.0/en/log/logging.html#sd-cards

Top

J12 - Spektrum UART Connector

Connector: 4 Position JST GH, Vertical, BM04B-GHS-TBT

Pin # Signal Name
1 VREG_3V3
2 SPEKTRUM_UART_TX
3 SPEKTRUM_UART_RX
4 GND

Top

J13 - I2C Display / I2C2 Bus / Safety Switch Connector

Connector: 5 Position, Vertical, BM05B-SRSS-TB(LF)(SN)

Pin # Signal Name
1 VREG_3V3
2 I2C2_SDA
3 I2C2_SCL
4 Safety Switch In (switch should pull high to 3.3V to enable)
5 GND

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