Pinout
Pin assignments for the ARK Pixhawk Payload Bus Breakout connectors.
Payload bus
J4 — 30-pin, 0.5 mm pitch FFC
1
GND
GND
2
UART4_TX_EXT
3.3V
3
UART4_RX_EXT
3.3V
4
GND
GND
5
I2C3_SDA_EXT
3.3V
6
I2C3_SCL_EXT
3.3V
7
GND
GND
8
CAN_P
5V
9
CAN_N
5V
10
GND
GND
11
FMU_CH7_EXT
3.3V
12
GPIO12_EXT
3.3V
13
FMU_CH8_EXT
3.3V
14
GND
GND
15
FMU_CAP_EXT
3.3V
16
GND
GND
17
PYLD_ETH_TX_P
Differential
18
PYLD_ETH_TX_N
Differential
19
GND
GND
20
PYLD_ETH_RX_P
Differential
21
PYLD_ETH_RX_N
Differential
22
GND
GND
23
GPIO01
3.3V
24
VBUS
5V
25
USB_N
3.3V
26
USB_P
3.3V
27
GND
GND
28
VDD_5V_HIGHPOWER_nEN
3.3V
29
VDD_5V_PERIPH_nEN
3.3V
30
GND
GND
G1–G6
GND
GND
Pin 28 is brought out to test point TP1 only and is not otherwise connected on this board. Pin 29 drives the enable input of the onboard protection switch through a 47 kΩ series resistor; pulling it low enables the VDD_5V_PERIPH rail.
5V input
J3 — 6-pin Molex Pico-Clasp
1
5V
5V
2
5V
5V
3
I2C3_SCL_EXT
3.3V
4
I2C3_SDA_EXT
3.3V
5
GND
GND
6
GND
GND
UART4 / I2C3
J1 — 6-pin JST-GH
1
VDD_5V_PERIPH
5V
2
UART4_TX_EXT
3.3V
3
UART4_RX_EXT
3.3V
4
I2C3_SCL_EXT
3.3V
5
I2C3_SDA_EXT
3.3V
6
GND
GND
CAN
J2 — 4-pin JST-GH
1
VDD_5V_PERIPH
5V
2
CAN_P
5V
3
CAN_N
5V
4
GND
GND
Ethernet
J5 — 4-pin JST-GH
1
PYLD_ETH_RX_N
Differential
2
PYLD_ETH_RX_P
Differential
3
PYLD_ETH_TX_N
Differential
4
PYLD_ETH_TX_P
Differential
The connector shell is intentionally left unconnected.
USB
J6 — 4-pin JST-GH
1
VBUS
5V
2
USB_N
3.3V
3
USB_P
3.3V
4
GND
GND
GPIO
J7 — 7-pin JST-GH
1
VDD_5V_PERIPH
5V
2
FMU_CH7_EXT
3.3V
3
FMU_CH8_EXT
3.3V
4
FMU_CAP_EXT
3.3V
5
GPIO01
3.3V
6
GPIO12_EXT
3.3V
7
GND
GND