Minimal CM5 Project Design

amirkat

amirkat

Add the minimum required set of components needed to run a simple project using the CM5. Keep the design as minimal and practical as possible while ensuring the module can boot and operate reliably.
Include only the essential supporting circuitry: Power input and regulation Decoupling capacitors Required clocks or pull-ups/pull-downs
Avoid unnecessary features or complex expansion circuitry Optimize for simplicity and fast prototyping Keep the BOM as small as possible

flux

0:06

Thought for a moment

I’ll build the smallest practical CM5 support schematic: first I’ll inspect the CM5 pinout and requirements, then add only the essential power/regulation, decoupling, and required biasing, wire it, and run checks.

flux

3:30

Thought for 3 sec

Created 7 tasks.

1/7 Inspect the existing CM5 symbol, pins, and current nets

Thought for 4 sec

Read U1 datasheet for Raspberry Pi Compute Module 5 minimum ca.

Read schematic.

Thought for 6 sec

2/7 Extract CM5 minimum boot power and required support circuitry from datasheet sources

Thought for 6 sec

Read U1 datasheet for Raspberry Pi Compute Module 5 carrier bo.

No results for USB-C receptacle 24 pin power only 5A sink connector USB Type C.

Found 5 results for Generic Capacitor.

Found 5 results for Generic Resistor.

No results for Generic Schottky diode TVS ESD protection USB VBUS 5V.

Thought for 6 sec

3/7 Select the smallest practical power input/regulation architecture and compute current budget

Thought for 5 sec

Running calculation.

Found 3 results for Find an available USB Type-C receptacle connector part for a minimal Raspberry Pi CM5 carrier board power input. Needs VBUS, GND, CC1 and CC2 pins exposed; USB data not required. Prefer common surface-mount receptacle with through-hole shell tabs, current rating suitable for up to 5A USB-C PD if available..

Found 3 results for Find a 5V VBUS ESD TVS protection diode for USB-C power input on a Raspberry Pi CM5 carrier board. Needs working voltage around 5V, low capacitance not critical for VBUS, SMD package, suitable surge/ESD protection..

Thought for 7 sec

4/7 Add essential connectors, regulator/protection, decoupling, and required pull components

Thought for a moment

Minimum architecture selected: regulated 5 V enters through USB-C, CM5 handles its onboard 3.3 V/1.8 V regulation, and GPIO_VREF will be tied to CM5_3.3V for normal 3.3 V GPIO. I’m adding only the USB-C input, VBUS protection, and two input capacitors.

flux

4:00

Thought for 9 sec

Thought for 5 sec

5/7 Wire CM5 power, grounds, enable/boot/reset support, and required passives

Thought for 2 sec

Read schematic.

Thought for 11 sec

Read D1 datasheet for SMF5.0A pin 1 pin 2 polarity cathode ano.

Thought for 6 sec

Read schematic.

Thought for 5 sec

Thought for 9 sec

Thought for 8 sec

Completed 6 design checks — found 215 issues.

Thought for 7 sec

Completed design_rule_check_erc_floating_pin check — found 215 issues.

Thought for 14 sec

Thought for a moment

Wiring is complete. The remaining ERC items are expected unused CM5 interfaces and unused USB-C data/SBU pins, so I’m marking them explicitly as no-connect rather than adding expansion circuitry.

flux

5:18

Thought for 10 sec

Thought for 3 sec

6/7 Validate schematic with ERC/review and fix real issues

Thought for 3 sec

Completed design checks — found 73 issues.

Read schematic.

Thought for 19 sec

Found 2 results for Find an in-stock 100uF 10V ceramic MLCC capacitor in 1210 / 3225 metric package suitable as USB-C 5V input bulk capacitor for Raspberry Pi CM5 carrier board. Prefer Murata, Samsung, TDK, Taiyo Yuden, X5R or X7R, SMD..

Found 2 results for Find an in-stock 0.1uF 100nF 10V ceramic MLCC capacitor in 0603 / 1608 metric package suitable as high frequency bypass capacitor on a 5V rail. Prefer X7R or X5R, SMD..

Thought for 8 sec

Thought for 25 sec

Thought for 31 sec

Thought for 5 sec

Completed design checks — found 70 issues.

Thought for 5 sec

7/7 tasks completed.

Thought for a moment

Done — I added a minimal CM5 bring-up schematic: USB-C 5 V input, VBUS TVS protection, 100 µF + 100 nF input capacitance, CC1/CC2 to the CM5, all 5 V/GND pins wired, GPIO_VREF tied to CM5_3.3V, and unused interfaces explicitly marked no-connect.
I also created Minimal CM5 Bring-Up Notes with the BOM, power budget, datasheet assumptions, and validation notes. Remaining review items are layout-stage airwires because the board is not placed/routed yet; U1:VBUS_EN is intentionally unused for this minimal boot-only design.
Proceed to layout
Add power switch
Add boot access
Use barrel input
Review BOM
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Minimal CM5 Bring-Up Notes
Scope
This schematic keeps only the minimum practical circuitry required to power and boot a Raspberry Pi Compute Module 5 carrier board prototype.
Datasheet-grounded requirements used
  • CM5 requires a regulated 5 V input rail from 4.75 V to 5.25 V.
  • CM5 power supply should accommodate 5 V at up to 2.5 A for peak load.
  • PMIC_ENABLE is internally pulled up to 5 V through 100 kΩ and may be left undriven for normal boot.
  • nRPIBOOT is internally pulled up through 10 kΩ to CM5_3.3V and may be left floating for normal eMMC boot.
  • EEPROM_nWP is internally pulled up through 100 kΩ to CM5_3.3V and may be left floating when write protection is not required.
  • GPIO_VREF must not float; it is tied to CM5_3.3V for standard 3.3 V GPIO signalling.
  • CM5 exposes CC1 and CC2 specifically for USB-C power negotiation up to 5 V / 5 A; these are wired directly to the USB-C connector CC pins.

Added minimal BOM

DesignatorFunctionValue / MPNNotes
J1USB-C power inputUJ20-C-H-G-SMT-2-P16-TRUses VBUS, GND, CC1, CC2 only. USB data/SBU pins intentionally no-connect.
D1VBUS protectionSMF5.0A5 V TVS from 5 V rail to GND.
C15 V bulk capacitor100 uF, Murata GRM32ER61A107ME20LEffective capacitance must be checked for MLCC DC-bias at 5 V.
C25 V HF bypass100 nF, Samsung CL10B104KB8NNNC / LCSC C15910603 X7R bypass on the 5 V rail.
Power budget
  • CM5 typical idle current: 400 mA.
  • CM5 typical operating current: 900 mA.
  • CM5 carrier supply target: 5 V at up to 2.5 A per datasheet guidance.
  • USB-C connector selected for a 5 A-capable path; final layout must use adequate copper for 2.5 A continuous/peak operation.
Intentional omissions for minimal BOM
  • No Ethernet, HDMI, PCIe, MIPI, SD, fan, GPIO headers, LEDs, buttons, or USB data routing.
  • PMIC_ENABLE, nRPIBOOT, EEPROM_nWP, PWR_Button, and unused interfaces are intentionally no-connect or left to internal pulls per datasheet behavior.
  • VBAT is tied to CM5_3.3V for a no-battery prototype RTC supply during powered operation; add a coin-cell circuit later if RTC retention is required while unpowered.
Validation notes
  • Schematic ERC floating-pin warnings were cleared by explicit no-connect markers for intentionally unused signals.
  • Remaining design review airwires are PCB routing-stage findings because the newly added nets have not been placed/routed yet.
  • U1:VBUS_EN is intentionally unused in this minimal design; it is a USB VBUS enable/control signal for designs that implement downstream USB power switching, not required for basic CM5 boot from eMMC.
Layout guidance for next phase
  • Place J1 on a board edge.
  • Place D1, C1, and C2 close to J1 / CM5 5 V entry.
  • Use wide 5 V and GND copper for 2.5 A capability.
  • Keep all GND pins stitched to a solid ground plane.

    Scope

    Datasheet-grounded requirements used

    Added minimal BOM

    Power budget

    Intentional omissions for minimal BOM

    Validation notes

    Layout guidance for next phase

Documents

    Minimal CM5 Bring-Up Notes

Assets

No assets added.

Raspberry Pi Compute Module 5 Template p6Vn

Raspberry Pi Compute Module 5 Template p6Vn thumbnail
This is the project template for the Raspberry Pi Compute Module 5, the new standard for embedded computing.
Leverage Raspberry Pi 5’s powerful hardware and efficient software stack in your own custom embedded systems.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

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Digi-Key

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HQonline

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LCSC

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Mouser

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TME

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Verical

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Controls