Pixhawk Adapter Board
Last updated
Last updated
The Pixhawk adapter board is used to break out the Skynode flight control interfaces on J3 and J4 to connectors and pinouts compatible to the Pixhawk-standard.
The voltage levels for all signals brought out from the FMU to the Pixhawk Adapter Board are either 5V or 3.3V compliant. Refer to the table below to check the voltage levels of specific pins. Exceeding these voltages will permanently damage the Flight Management Unit inside Skynode.
I2C lines are pulled up with 1kΩ in Skynode. External pull up resistors shall not be added.
The highlighted pin 6 was added in rev 6 of the Pixhawk Adapter Board, to ensure compatibility with the PX4 F9P GPS module. For backwards compatibility with the Freefly RTK GPS module, a custom cable needs to be made.
I2C lines are pulled up with 1kΩ in Skynode. External pull up resistors shall not be added.
I2C lines are pulled up with 1kΩ in Skynode. External pull up resistors shall not be added.
I2C lines are pulled up with 1kΩ in Skynode. External pull up resistors shall not be added.
Take a look at the for details about the changes.
CAN bus termination on Skynode changed in RC11. Prior to , Skynode has a 120Ω bus termination resistor inside, with no CAN termination on the Pixhawk Adapter Boards (until rev 5 included). This configuration assumed that Skynode was at the end of the bus. Rev 11 and onwards has the 120Ω bus termination resistor on the Pixhawk Adapter Boards (from rev 6 included), without built-in termination inside of Skynode. When designing a wire harness instead of using the Pixhawk Adapter Boards, usage of 120Ω termination resistors at both ends of the bus is mandatory, following ISO 11898..
CAN bus termination on Skynode changed in RC11. Prior to , Skynode has a 120Ω bus termination resistor inside, with no CAN termination on the Pixhawk Adapter Boards (until rev 5 included). This configuration assumed that Skynode was at the end of the bus. Rev 11 and onwards has the 120Ω bus termination resistor on the Pixhawk Adapter Boards (from rev 6 included), without built-in termination inside of Skynode. When designing a wire harness instead of using the Pixhawk Adapter Boards, usage of 120Ω termination resistors at both ends of the bus is mandatory, following ISO 11898.