Pico to Pi HAT X Converter

Adapter board that maps Raspberry Pi Pico (RP2040) or Pico-pin-compatible boards into the Raspberry Pi Zero 2x20 GPIO form factor. Enables use of standard Pi HATs with Pico-class boards. No active circuitry; passive pin remapping only.
Pinout
- 40 PI Header
Raspberry Pi HAT 2x20 header interface exposed by the Pico to Pi HAT X Converter pinout diagram.
Type ยท Unknown - 3V3
3.3 V rail on the Pi header side of the converter.
Type ยท PowerVoltage ยท 3.3V - 5V
5 V rail on the Pi header side of the converter.
Type ยท PowerVoltage ยท 5V - GND
Ground pins on the Pi header and Pico header mappings.
Type ยท Ground - SDA1
Pi-header I2C data signal mapped in the pinout diagram to Pico GP11 / GP13 side labels depending on header side.
Type ยท I2C - SCL1
Pi-header I2C clock signal mapped in the pinout diagram to Pico GP14 side label.
Type ยท I2C - TX
UART transmit signal shown on the Pi header mapping, paired with Pico GP15 in the diagram.
Type ยท UART - RX
UART receive signal shown on the Pi header mapping, paired with Pico GP16 in the diagram.
Type ยท UART - MOSI
SPI MOSI signal on the Pi header mapping, shown with Pico GP36 / GPIO 20 region in the diagram.
Type ยท SPI - MISO
SPI MISO signal on the Pi header mapping, shown with Pico GP37 / GPIO 19 region in the diagram.
Type ยท SPI - SCLK
SPI clock signal on the Pi header mapping, shown with Pico GP35 / GPIO 21 region in the diagram.
Type ยท SPI - CE0
SPI chip-select 0 signal on the Pi header mapping.
Type ยท GPIO - CE1
SPI chip-select 1 signal on the Pi header mapping.
Type ยท GPIO - 2x20 pin Pico Headers
Dual 2x20 Pico header interface, labelled Pi Pico L and Pi Pico R in the converter pinout diagram.
Type ยท Unknown - VBUS
Pico VBUS connection shown in the converter pinout diagram.
Type ยท PowerVoltage ยท USB VBUS / 5V domain - VSYS
Pico VSYS connection shown in the converter pinout diagram.
Type ยท Power - RUN
Pico RUN control pin shown in the converter pinout diagram.
Type ยท Control
| Pin | Type | Function | Voltage |
|---|---|---|---|
| 40 PI Header | Unknown | Raspberry Pi HAT 2x20 header interface exposed by the Pico to Pi HAT X Converter pinout diagram. | |
| 3V3 | Power | 3.3 V rail on the Pi header side of the converter. | 3.3V |
| 5V | Power | 5 V rail on the Pi header side of the converter. | 5V |
| GND | Ground | Ground pins on the Pi header and Pico header mappings. | |
| SDA1 | I2C | Pi-header I2C data signal mapped in the pinout diagram to Pico GP11 / GP13 side labels depending on header side. | |
| SCL1 | I2C | Pi-header I2C clock signal mapped in the pinout diagram to Pico GP14 side label. | |
| TX | UART | UART transmit signal shown on the Pi header mapping, paired with Pico GP15 in the diagram. | |
| RX | UART | UART receive signal shown on the Pi header mapping, paired with Pico GP16 in the diagram. | |
| MOSI | SPI | SPI MOSI signal on the Pi header mapping, shown with Pico GP36 / GPIO 20 region in the diagram. | |
| MISO | SPI | SPI MISO signal on the Pi header mapping, shown with Pico GP37 / GPIO 19 region in the diagram. | |
| SCLK | SPI | SPI clock signal on the Pi header mapping, shown with Pico GP35 / GPIO 21 region in the diagram. | |
| CE0 | GPIO | SPI chip-select 0 signal on the Pi header mapping. | |
| CE1 | GPIO | SPI chip-select 1 signal on the Pi header mapping. | |
| 2x20 pin Pico Headers | Unknown | Dual 2x20 Pico header interface, labelled Pi Pico L and Pi Pico R in the converter pinout diagram. | |
| VBUS | Power | Pico VBUS connection shown in the converter pinout diagram. | USB VBUS / 5V domain |
| VSYS | Power | Pico VSYS connection shown in the converter pinout diagram. | |
| RUN | Control | Pico RUN control pin shown in the converter pinout diagram. |
Pin details
17 connections- 40 PI Header
Raspberry Pi HAT 2x20 header interface exposed by the Pico to Pi HAT X Converter pinout diagram.
Unknown - 3V3
3.3 V rail on the Pi header side of the converter.
PowerVoltage ยท 3.3V - 5V
5 V rail on the Pi header side of the converter.
PowerVoltage ยท 5V - GND
Ground pins on the Pi header and Pico header mappings.
Ground - SDA1
Pi-header I2C data signal mapped in the pinout diagram to Pico GP11 / GP13 side labels depending on header side.
I2C - SCL1
Pi-header I2C clock signal mapped in the pinout diagram to Pico GP14 side label.
I2C - TX
UART transmit signal shown on the Pi header mapping, paired with Pico GP15 in the diagram.
UART - RX
UART receive signal shown on the Pi header mapping, paired with Pico GP16 in the diagram.
UART - MOSI
SPI MOSI signal on the Pi header mapping, shown with Pico GP36 / GPIO 20 region in the diagram.
SPI - MISO
SPI MISO signal on the Pi header mapping, shown with Pico GP37 / GPIO 19 region in the diagram.
SPI - SCLK
SPI clock signal on the Pi header mapping, shown with Pico GP35 / GPIO 21 region in the diagram.
SPI - CE0
SPI chip-select 0 signal on the Pi header mapping.
GPIO - CE1
SPI chip-select 1 signal on the Pi header mapping.
GPIO - 2x20 pin Pico Headers
Dual 2x20 Pico header interface, labelled Pi Pico L and Pi Pico R in the converter pinout diagram.
Unknown - VBUS
Pico VBUS connection shown in the converter pinout diagram.
PowerVoltage ยท USB VBUS / 5V domain - VSYS
Pico VSYS connection shown in the converter pinout diagram.
Power - RUN
Pico RUN control pin shown in the converter pinout diagram.
Control
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