WSAL22594 – CM4-to-CM3-Board/en
Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.
Summary
The Waveshare CM4-to-CM3 adapter allows a Raspberry Pi Compute Module 4 (CM4) to be used on an existing CM3/CM3+ baseboard. It provides the required interfaces and offers options for power supply and IO level.
Related products at JW Tech
Technical overview
- Connects a CM4 to a CM3 baseboard via the integrated CM3 interface.
- Provided interfaces: HDMI, CSI0/CSI1, DSI0/DSI1, USB2.0, SDIO, GPIO0–27 plus additional GPIOs (e.g., GPIO28/29, SDA0/SCL0).
- Selectable power supply: direct or through the onboard DC buck-boost stage MP28164 (default: through the stage).
- Selectable CM4 IO level; default is 3.3 V.
- A status LED indicates whether the CM4 is active.
- Software tools listed in the source: RPiboot_Setup, Panasonic_SDFormatter, Win32DiskImager, putty.
Notes and version constraints
- No specific commands are provided in the source; left empty accordingly.
- The exact mapping of the extra GPIOs (GPIO30, 32, 33–45, CAM_GPIO) is incompletely shown in the table – please verify.
- Power-supply and IO-level selection is likely done via jumpers/resistors; detailed circuit information is not included in the text.
- Compatibility with all CM3/CM3+ baseboards is not guaranteed; versions and revisions may differ.
- Please check the official schematic and CM4 datasheet before purchase or installation.
Source and revision record
- CM4-to-CM3-Board - Waveshare Wiki
- Source revision: 67507
- Captured: 2026-09-03T04:10:32+00:00
- SHA-256:
99ab0f4c4039dd3d2ed6382c1ef030027631a7067c6bf0d001828641c10e71be