Pixhawk Connector Standard

Pixhawk Connector Standard
Pixhawk Connector Standard 2019-03-10T02:26:22+00:00

This document describes the Pixhawk connector series and pinouts standard. The long-term goal is to offer several tiers of connectors:

  • Miniature, in-vehicle: JST GH
  • Small, IPX9 or similar, automotive grade and sealed (This has not entered the standardization process)

CAN Tranceivers

These types are recommended:

  • TJA1051TK3/118
  • LTC2875

Dronecode Mini

The Dronecode Mini (DCM) connector standard is intended for in-vehicle, cross-PCB use. It uses the JST GH series which offers a latch lock mechanism at small size and a very competitive cost ($0.15 / 6 pos connector footprint in quantities).

Pinouts

Telemetry Port

This pinout should be used for any serial port. Ports not supporting hardware flow control should leave the CTS and RTS lines floating. Cables should be 1:1 to the periphal and TX / RX as well as CTS / RTS should be crossed on the peripheral side (e.g. a radio modem would have its RX port on pin 2, TX port on pin 3, RTS on port 4 and CTS on port 5).

PinSignalVolt
1 (red)VCC+5V
2 (blk)TX (OUT)+3.3V
3 (blk)RX (IN)+3.3V
4 (blk)CTS (IN)+3.3V
5 (blk)RTS (OUT)+3.3V
6 (blk)GNDGND

GPS port

This port is intended for combined serial plus I2C GPS units.

PinSignalVolt
1 (red)VCC+5V
2 (blk)TX (OUT)+3.3V
3 (blk)RX (IN)+3.3V
4 (blk)I2C1 SCL+3.3V
5 (blk)I2C1 SDA+3.3V
6 (blk)GNDGND

CAN

Recommended CAN transceivers: TJA1051TK3/118 or LTC2875

PinSignalVolt
1 (red)VCC+5V
2 (blk)CAN_H+5V
3 (blk)CAN_L+5V
4 (blk)GNDGND

I2C port

PinSignalVolt
1 (red)VCC+5V
2 (blk)I2C1 SCL+3.3V (1.5K pullup on autopilot)
3 (blk)I2C1 SDA+3.3V (1.5K pullup on autopilot)
4 (blk)GNDGND

SPI port

This port is optional and for external SPI sensors.

PinSignalVolt
1 (red)VCC+5V
2 (blk)SPI_EXT_SCK+3.3
3 (blk)SPI_EXT_MISO+3.3
4 (blk)SPI_EXT_MOSI+3.3
5 (blk)!SPI_SS1+3.3
6 (blk)!SPI_SS2+3.3
7 (blk)GNDGND

ANALOG POWER

The CURRENT signal should carry an analog voltage from 0-3.3V for 0-60A as default. For high-power units the range should be 0-3.3V for 0-120A. The VOLTAGE signal should carry an analog voltage from 0-3.3V for 0-50A as default.

The VCC lines have to offer at least 2.5A continuous and should default to 5.3V. A lower voltage of 5V is still acceptable, but discouraged.

PinSignalVolt
1 (red)VCC+5.3V
2 (blk)VCC+5.3V
3 (blk)CURRENT+3.3V
4 (blk)VOLTAGE+3.3V
5 (blk)GNDGND
6 (blk)GNDGND

Dronecode Debug

To facilitate debug and service cables, Dronecode has developed several debug connectors, of which the Dronecode mini debug connector has entered active service.

DCD-Mini

NOTE: THIS IS NOT THE SAME CONNECTOR SERIES AS FOR THE REGULAR PORTS

Dronecode debug port (JST SM06B connector). The indicated voltage is nominal 3.3V, but for a target running at a lower voltage (e.g. 1.8V) the debug probe should shift its voltage to the target sense voltage. Up to 100 mA should be provided on TARGET PROCESSOR VOLTAGE so that debug adapters can drive their shifter / optocoupler directly from this line.

PinSignalVolt
1 (red)TARGET PROCESSOR VOLTAGE+1.8V-3.3V
2 (blk)CONSOLE TX (OUT)+3.3V
3 (blk)CONSOLE RX (IN)+3.3V
4 (blk)SWDIO+3.3V
5 (blk)SWCLK+3.3V
6 (blk)GNDGND

Solder pads on board next to connector:

PadSignalVolt
1NRST (reset)+3.3V
2GPIO1 (free GPIO)+3.3V
3GPIO2 (free GPIO)+3.3V