USB/PWR Splitter guide
The adaptor allows the Raspberry Pi 4 to be used with a Pi USB-C power supply while allowing access to USB OTG data over a separate USB-C connection.
USB-C (RPI4) <> USB-C (USB) and USB-C (PWR)
|USB-C(RPI4)||USB Type-C(USB)||USB Type-C(PWR)|
|CC1 10k to 5V||CC1 5.1k to GND||CC1 5.1k to GND|
|CC2 10k to 5V||CC2 5.1k to GND||CC2 5.1k to GND|
To use the adaptor with the Raspberry Pi 4 you need.
- USB-C to USB-C cable between Pi4 and the adaptor board
- USB-C to USB-C or Type-A between adaptor board and PC
- Power via Official Raspberry Pi USB Type-C Power Supply.
 Whilst USB-C cables are generally designed for higher current I still advise using short power cable to the Pi where possible to reduce voltage drop.
 PLEASE NOTE With the Pu/Pd resistors on this board it can only be used with 5V supply to power a 5V device.
An adaptor of this kind does not fall within the USB specification. It's designed for use with the official Raspberry Pi USB-C power supply and raspberry pi, use with other power supplies/chargers and devices may cause issues/damage.