Cm4 94v0 Schematics [work] Jun 2026
The CM4 uses absolute pin numbering (1 to 200), with pins 1-100 belonging to J6 and 101-200 belonging to J7. Different IO banks on the CM4 have different voltage levels: The main GPIO bank (used for UART, SPI, and I2C) operates at 3.3V, while specific interfaces like the SDIO interface for Wi-Fi/Bluetooth may require 1.8V or supply their own regulated power. Finally, high-speed signals like Ethernet (pins 3-6), PCIe, and USB require careful impedance matching.
Before sending your design to a PCB manufacturer:
The CM4 requires specific power-up sequences for the +5V and +3.3V rails to prevent damage to the SoC.
This is a compact, high-performance module designed for industrial and embedded applications. Unlike standard Raspberry Pi boards, it lacks onboard ports and instead connects to a carrier or "IO board" via two 100-pin high-density connectors. 94V-0 Rating: cm4 94v0 schematics
If the board has a large Raspberry Pi logo and says "Compute Module 4 IO Board," it is the official reference design.
Gigabit Ethernet (via BCM54210PE) is often included on carrier designs. HDMI: Dual HDMI 2.0 ports are supported by the CM4. C. Connectors (Hirose) The CM4 uses two 100-pin Hirose connectors:
The CM4 exposes one PCIe Gen 2 lane.
When you see "CM4 94V-0" on a printed circuit board (PCB), you are looking at two entirely different manufacturing shorthand terms stamped next to each other. What is CM4?
Below is a comprehensive breakdown of the CM4's hardware architecture, carrier board design, and how to utilize the official schematics effectively. Understanding the CM4 Hardware Architecture
The CM4 brings almost all the functionality of a Raspberry Pi 4 into a smaller footprint. The schematic architecture centers on the following: 1. Broadcom BCM2711 System on Chip (SoC) The CM4 uses absolute pin numbering (1 to
This is not a model number . It is a UL 94 flammability rating issued by Underwriters Laboratories. A 94V-0 rating certifies that the plastic and fiberglass materials used to make the printed circuit board (PCB) will self-extinguish within 10 seconds during a fire test.
: Many engineers share open-source CM4 carrier board files on
input. The schematics show that the CM4 handles the internal conversion to 3.3V3.3 cap V 1.8V1.8 cap V 1.1V1.1 cap V for the processor and RAM. B. High-Speed Interfaces Before sending your design to a PCB manufacturer:
If you are looking to design a specific type of carrier board, I can help you find: Schematics for PCIe breakout boards Guidelines on EMI/EMC compliance for your CM4 design Share public link
