Ghid de utilizare Raspberry Pi Compute Module 4
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| Eliberare | 1 |
| Construi data | 22/07/2025 |
| Construi versiune | 0afd6ea17b8b |
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Istoricul versiunilor documentului
| Eliberare | Data | Descriere |
| 1 | Mar 2025 | Initial release. This document is heavily based on the ‘Raspberry Pi Compute Module 5 forward guidance’ whitepaper. |
Sfera documentului
Acest document se aplică următoarelor produse Raspberry Pi:
| Pi 0 | Pi 1 | Pi 2 | Pi 3 | Pi 4 | Pi 400 | Pi 5 | Pi 500 | CM1 | CM3 | CM4 | CM5 | Pico | Pico2 | ||||
| 0 | W | H | A | B | A | B | B | Toate | Toate | Toate | Toate | Toate | Toate | Toate | Toate | Toate | Toate |
Introducere
Raspberry Pi Compute Module 5 continuă tradiția Raspberry Pi de a lua cel mai recent computer emblematic Raspberry Pi și de a produce un produs mic, echivalent hardware, potrivit pentru aplicații integrate. Raspberry Pi Compute Module 5 are același factor de formă compact ca Raspberry Pi Compute Module 4, dar oferă performanțe mai mari și un set de funcții îmbunătățit. Există, desigur, unele diferențe între Raspberry Pi Compute Module 4 și Raspberry Pi Compute Module 5, iar acestea sunt descrise în acest document.
NOTA
For the few customers who are unable to use Raspberry Pi Compute Module 5, Raspberry Pi Compute Module 4 will stay in production until at least 2034.
The Raspberry Pi Compute Module 5 datasheet should be read in conjunction with this whitepaper.
https://datasheets.raspberrypi.com/cm5/cm5-datasheet.pdf
Caracteristici principale
Raspberry Pi Compute Module 5 has the following features:
- Quad-core 64-bit Arm Cortex-A76 (Armv8) SoC clocked @ 2.4GHz
- 2GB, 4GB, 8GB, or 16GB LPDDR4 SDRAM
- On-board eMMC flash memory, OGB (Lite model), 16GB, 32GB, or 64GB options
- 2x porturi USB 3.0
- 1 Gb Ethernet interface
- 2x 4-lane MIPI ports supporting both DSI and CSI-2
- 2x HDMI ports able to support 4Kp60 simultaneously
- 28x GPIO pins
- On-board test points to simplify production programming
- Internal EEPROM on the bottom to improve security
- On-board RTC (external battery via 100-pin connectors)
- On-board fan controller
- On-board Wi-Fi®/Bluetooth (depending on SKU)
- 1-lane PCIe 2.0′
- Type-C PD PSU support
NOTA
Not all SDRAM/eMMC configurations are available. Please check with our sales team.
In some applications PCIe Gen 3.0 is possible, but this is not officially supported.
Compatibilitate cu Raspberry Pi Compute Module 4
For most customers, Raspberry Pi Compute Module 5 will be pin-compatible with Raspberry Pi Compute Module 4.
The following features have been removed/altered between the Raspberry Pi Compute Module 5 and Raspberry Pi Compute Module 4 models:
- Video compozit
- The composite output available on Raspberry Pi 5 is NOT routed out on Raspberry Pi Compute Module 5
- 2-lane DSI port
- There are two 4-lane DSI ports available on Raspberry Pi Compute Module 5, muxed with the CSI ports for a total of two
- 2-lane CSI port
- There are two 4-lane CSI ports available on Raspberry Pi Compute Module 5, muxed with the DSI ports for a total of two
- 2x ADC inputs
Memorie
Raspberry Pi Compute Module 4’s maximum memory capacity is 8GB, whereas Raspberry Pi Compute Module 5 is available in a 16GB RAM variant.
Unlike Raspberry Pi Compute Module 4, Raspberry Pi Compute Module 5 is NOT available in a 1GB RAM variant.
Audio analogic
Analogue audio can be muxed onto GPIO pins 12 and 13 on Raspberry Pi Compute Module 5, in the same way as on Raspberry Pi Compute Module 4.
Use the following device tree overlay to assign analogue audio to these pins:
Due to an errata on the RP1 chip, GPIO pins 18 and 19, which could be used for analogue audio on Raspberry Pi Compute Module
4, are not connected to the analogue audio hardware on Raspberry Pi Compute Module 5 and cannot be used.
NOTA
The output is a bitstream rather than a genuine analogue signal. Smoothing capacitors and an ampVa fi necesar un liver pe placa IO pentru a comanda o ieșire la nivel de linie.
Modificări la bootarea prin USB
USB booting from a flash drive is only supported via the USB 3.0 ports on pins 134/136 and 163/165
Raspberry Pi Compute Module 5 does NOT support USB host boot on the USB-C port
Unlike the BCM2711 processor, the BCM2712 does not have an XHCI controller on the USB-C interface, just a DWC2 controller on pins 103/105. Booting using 1800t is done via these pins.
Trecerea la modulul de resetare și oprire
1/0 pin 92 is now set to w Button rather than sus PG this means you need to use a PMIC EN to reset the module.
The PRIC ENABLE Signal resets the PMIC, and therefore the SoC. You can view PRIC EN when it’s driven low and released, which is functionally similar to driving tus Po low on Raspberry Pi Compute Module 4 and releasing it.
Raspberry Pi Compute Module 4 has the added benefit of being able to reset peripherals via the nEXTRST signal. Raspberry Pi Compute Module 5 will emulate this functionality on CAM GPIOT.
GLOBAL EN/PHIC EN are wired directly to the PMIC and bypass the OS completely. On Raspberry Pi Compute Module 5, use
GLOBAL EN/PHIC Es to execute a hard (but unsafe) shutdown
If there is a need, when using an existing 10 board, to retain the functionality of toggling I/O pin 92 to start a hard reset, you should intercept the Button at the software level; rather than having it invoke a system shutdown, it can be used to generate a software interrupt and, from there, to trigger a system reset directly (eg. write to S)
Device tree entry handling a power button (arch/arm64/boot/dts/broadcom/bcm2712-rpi-cm5.dtsi).
Code 116 is the standard event code for the kernel’s KEY POWER event, and there is a handler for this in the OS.
Raspberry Pi recommends using kernel watchdogs if you are concerned about the firmware or the OS crashing and leaving the power key unresponsive. ARM watchdog support is already present in Raspberry Pi OS via the device tree, and this can be customised to individual use cases. In addition, a long press/pull on the PIR Button (7 seconds) will cause the PMIC’s built-in handler to shut down the device.
Modificări detaliate ale pinilor
CAM1 and DSI1 signals have become dual-purpose and can be used for either a CSI camera or a DSI display.
The pins previously used for CAMO and DSIO on Raspberry Pi Compute Module 4 now support a USB 3.0 port on Raspberry Pi Compute Module 5.
The original Raspberry Pi Compute Module 4 VBAC COMP pin is now a VBUS-enabled pin for the two USB 3.0 ports, and is active high. Raspberry Pi Compute Module 4 has extra ESD protection on the HDMI, SDA, SCL, HPD, and CEC signals. This is removed from Raspberry Pi Compute Module 5 due to space limitations. If required, ESD protection can be applied to the baseboard, although Raspberry Pi Ltd does not regard it as essential.
|
Pin |
CM4 | CM5 | Comentariu |
| 16 | SYNC_IN | Fan_tacho | Fan tacho input |
| 19 | Ethernet nLED1 | Fan_pwn | Fan PWM output |
| 76 | Rezervat | VBAT | RTC battery. Note: There will be a constant load of a few uA, even if CM5 is powered. |
| 92 | RUN_PG | Buton PWR | Replicates the power button on Raspberry Pi 5. A short press signals that the device should wake up or shut down. A long press forces shutdown. |
| 93 | nRPIBOOT | nRPIBOOT | If the PWR_Button is low, this pin will also be set low for a short time after power-up. |
| 94 | AnalogIP1 | CC1 | This pin can connect to the CC1 line of a Type-C USB connector to enable the PMIC to negotiate 5A. |
| 96 | AnalogIP0 | CC2 | This pin can connect to the CC2 line of a Type-C USB connector to enable the PMIC to negotiate 5A. |
| 99 | Global_EN | PMIC_ENABLE | No external change. |
| 100 | nEXTRST | CAM_GPIO1 | Pulled up on Raspberry Pi Compute Module 5, but can be forced low to emulate a reset signal. |
| 104 | Rezervat | PCIE_DET_nWAKE | PCIE nWAKE. Pull up to CM5_3v3 with an 8.2K resistor. |
| 106 | Rezervat | PCIE_PWR_EN | Signals whether the PCIe device can be powered up or down. Active high. |
| 111 | VDAC_COMP | VBUS_EN | Output to signal that USB VBUS should be enabled. |
| 128 | CAM0_D0_N | USB3-0-RX_N | May be P/N swapped. |
| 130 | CAM0_D0_P | USB3-0-RX_P | May be P/N swapped. |
| 134 | CAM0_D1_N | USB3-0-DP | USB 2.0 signal. |
| 136 | CAM0_D1_P | USB3-0-DM | USB 2.0 signal. |
| 140 | CAM0_C_N | USB3-0-TX_N | May be P/N swapped. |
| 142 | CAM0_C_P | USB3-0-TX_P | May be P/N swapped. |
| 157 | DSI0_D0_N | USB3-1-RX_N | May be P/N swapped. |
| 159 | DSI0_D0_P | USB3-1-RX_P | May be P/N swapped. |
| 163 | DSI0_D1_N | USB3-1-DP | USB 2.0 signal. |
| 165 | DSI0_D1_P | USB3-1-DM | USB 2.0 signal. |
| 169 | DSI0_C_N | USB3-1-TX_N | May be P/N swapped. |
| 171 | DSI0_C_P | USB3-1-TX_P | May be P/N swapped. |
Pe lângă cele de mai sus, semnalele PCIe CLK nu mai sunt cuplate capacitiv.
PCB
Raspberry Pi Compute Module 5′s PCB is thicker than Raspberry Pi Compute Module 4′s, measuring at 1.24mm+/-10%.
Lungimile pistelor
HDMI0 track lengths have changed. Each P/N pair remains matched, but the skew between pairs is now <1mm for existing motherboards. This is unlikely to make a difference, as the skew between pairs can be in the order of 25 mm.
HDMI1 track lengths have also changed. Each P/N pair remains matched, but the skew between pairs is now <5mm for existing motherboards. This is unlikely to make a difference, as the skew between pairs can be in the order of 25 mm.
Lungimile pistelor Ethernet s-au modificat. Fiecare pereche P/N rămâne potrivită, dar asimetria dintre perechi este acum <4 mm pentru plăcile de bază existente. Este puțin probabil ca acest lucru să facă o diferență, deoarece asimetria dintre perechi poate fi de ordinul a 12 mm.
Conectori
Cei doi conectori cu 100 de pini au fost schimbați la o altă marcă. Aceștia sunt compatibili cu conectorii existenți, dar au fost testați la curenți mari. Piesa de conectare care se conectează la placa de bază este Amphenol P/N 10164227-1001A1RLF
Bugetul de putere
As Raspberry Pi Compute Module 5 is significantly more powerful than Raspberry Pi Compute Module 4, it will consume more electrical power. Power supply designs should budget for SV up to 2.5A. If this creates an issue with an existing motherboard design, it is possible to reduce the CPU clock rate to lower the peak power consumption.
The firmware monitors the current limit for USB, which effectively means that usb mas surrant, enable is always 1 on CM5, the 10 board design should take the total USB current required into consideration.
The firmware will report the detected power supply capabilities (if possible) via device-tree. On a running system, see /proc/device tree/chosen/poser/Aceste filesunt stocate ca date binare big-endian pe 32 de biți.
Modificări/cerințe software
Din punct de vedere software view, modificările de hardware între Raspberry Pi Compute Module 4 și Raspberry Pi Compute Module 5 sunt ascunse utilizatorului de noul arbore de dispozitive files, ceea ce înseamnă că majoritatea software-ului care respectă API-urile Linux standard va funcționa fără modificări. Arborele de dispozitive fileasigură-te că driverele corecte pentru hardware sunt încărcate la momentul pornirii.
Arborele de dispozitive files pot fi găsite în arborele kernelului Linux Raspberry Pi. De exempluamppe:
https://github.com/raspberrypi/linux/blob/rpi-612.y/arch/arm64/boot/dis/broadcom/bom2712-pi-om5.dtsi.
Utilizatorilor care trec la Raspberry Pi Compute Module 5 li se recomandă să utilizeze versiunile de software indicate în tabelul de mai jos sau mai noi. Deși nu este obligatorie utilizarea sistemului de operare Raspberry Pi, acesta este un document de referință util, de aceea a fost inclus în tabel.
| Software | Versiune | Data | Note |
| Raspberry Pi OS | Bookworm (12) | ||
| Firmware | From 10 Mar 2025 | Vedea https://pip.raspberrypi.com/categories/685-app-notes-guides- whitepapers/documents/RP-003476-WP/Updating-Pi-firmware.pdf for details on upgrading firmware on an existing image. Note that Raspberry Pi Compute Module 5 devices come pre-programmed with appropriate firmware | |
| Nucleu | 6.12.x | De la 2025 | This is the kernel used in Raspberry Pi OS |
Moving to standard Linux APIs/libraries from proprietary drivers/
firmware
Toate modificările enumerate mai jos au făcut parte din tranziția de la Raspberry Pi OS Bullseye la Raspberry Pi OS Bookworm în octombrie 2023. Deși Raspberry Pi Compute Module 4 a putut utiliza API-urile mai vechi și depreciate (deoarece firmware-ul legacy necesar era încă prezent), acest lucru nu este valabil și pentru Raspberry Pi Compute Module 5.
Raspberry Pi Compute Module 5, la fel ca Raspberry Pi 5, se bazează acum pe stiva de afișare DRM (Direct Rendering Manager), în loc de stiva veche, adesea denumită DispmanX. NU există suport firmware pentru Raspberry Pi Compute Module 5 pentru DispmanX, așa că trecerea la DRM este esențială.
A similar requirement applies to cameras, Raspberry Pi Compute Module 5 only supports the libcamera library’s API, so older applications that use the legacy firmware MMAL APIs, such as raspi-still and rasps-vid, no longer function.
Aplicațiile care utilizează API-ul OpenMAX (camere, codecuri) nu vor mai funcționa pe Raspberry Pi Compute Module 5, așa că vor trebui rescrise pentru a utiliza V4L2. Ex.ampFișiere din acesta pot fi găsite în depozitul GitHub libcamera-apps, unde sunt folosite pentru a accesa hardware-ul encoderului H264.
OMXPlayer is no longer supported, as it also uses the MMAL API for video playback, you should use the VLC application. There is no command-line compatibility between these applications: see the VLC documentation for details on usage.
Raspberry Pi previously published a whitepaper that discusses these changes in more detail: https://pip.raspberrypi.com/categories/685-app-notes-guides-whitepapers/documents/RP-006519-WP/Transitioning-from-Buliseye-to-Bookworm.pdf.
Informații suplimentare
While not strictly related to the transition from Raspberry Pi Compute Module 4 to Raspberry Pi Compute Module 5, Raspberry Pi Ltd has released a new version of the Raspberry Pi Compute Module provisioning software and also has two distro generation tools that users of Raspberry Pi Compute Module 5 may find useful.
rpi-sb-provisioner is a minimal-input, automatic secure boot provisioning system for Raspberry Pi devices. It is entirely free to download and use, and can be found on our GitHub page here: https://github.com/raspberrypi/rpi-sb-provisioner.
pi-gen is the tool used to create the official Raspberry Pi OS images, but it is also available for third parties to use to create their own distributions. This is the recommended approach for Raspberry Pi Compute Module applications that require customers to build a custom Raspberry Pi OS-based operating system for their specific use case. This is also free to download and use, and can be found here: https://github.com/RPi-Distro/pi-gen. The pi-gen tool integrates well with rpi-sb-provisioner to provide an end-to-end process for generating secure boot OS images and implementing them on Raspberry Pi Compute Module 5.
rpi-image-gen is a new image creation tool (https://github.com/raspberrypi/rpi-image-gen) that may be more appropriate for more lightweight customer distributions
For bring-up and testing and where there is no requirement for the full provisioning system rpiboot is still available on Raspberry Pi Compute Module 5. Raspberry Pi Ltd recommends using a host Raspberry Pi SBC running the latest version of Raspberry Pi OS and the latest rathoot from https://github.com/raspberrypi/usbboot. You must use the ‘Mass Storage Gadget option when running rpiboot, as the previous firmware-based option is no longer supported.
Date de contact pentru mai multe informații
Vă rugăm să contactați
applications@iraspberrypi.com
if you have any queries about this whitepaper.
Web: www.raspberrypi.com
Documente/Resurse
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Modulul de calcul Raspberry Pi 4 [pdfGhid de utilizare Modulul de calcul 4, Modulul 4 |