USB Interposer

An RP2040 board with hardware USB Device (plug) and software USB Host (socket)!

The USB Interposer from 8086 is a compact RP2040-based board with two USB ports, the USB 2 Type-A plug is connected to the hardware USB device and the USB socket is connected to GPIO pins allowing it to be used with Pico-PIO-USB (a USB host/device implementation using PIO of Raspberry Pi Pico).

The board also has 2 LEDs on each side (red/amber), 3-pin SH sockets for UART and SWD debug, and a 4-pin SH socket (STEMMA QT/Qwiic) for I2C. The BOOT button is also available as a user button.

The USB Host port can be used with CircuitPython (USB HOST) or Arduino software.

GPIO	Name	Description
GP0	UART TX	Serial Port
GP1	UART RX	Serial Port
GP7	LED	Top Red
GP8	LED	Top Amber
GP12	Button	User/BOOT
GP14	SDA	I2C St/Qw Port
GP15	SCL	I2C St/Qw Port
GP16	D+	USB Socket
GP17	D-	USB Socket
GP18	USB PWR Enable	USB Socket
GP22	LED	Bottom Red
GP23	LED	Bottom Amber
GP26	ADC	/2 voltage on VBUS Input
GP27	ADC	/2 voltage on VBUS Output

Package Contents

• 1x USB Interposer board