RP2040 PICAN Castellated Molecule v1

Creator Caleb

Tools kicad

Version 1.0.0

Assets 1 files

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RP2040 CAN Find the RP2040 CAN bus molecule

PICAN pinout Show the pin mapping for the RP2040 PICAN molecule

CAN molecule I need a CAN FD molecule for my workcell

RP2040 castellated What RP2040 castellated molecules do we have?

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Search the Adom Wiki for the molecule "RP2040 PICAN Castellated Molecule v1" (slug: rp2040-pican-castellated-v1) at https://wiki-ufypy5dpx93o.adom.cloud/wiki/molecules/rp2040-pican-castellated-v1. Download its symbol (.kicad_sym), footprint (.kicad_mod), and 3D model (.glb/.step) assets into my current KiCad project under symbols/, footprints/, and 3dmodels/ directories. Register them in the project library tables. Show me the files once installed.

Castellated RP2040 molecule with integrated MCP251863 CAN bus controller/transceiver — 19×35 mm, 4 corner machine pins, 49 castellated machine contacts. USB-C, 16 MB QSPI flash, SWD debug, and 120 Ω CAN termination on-board.

Overview

Property	Value
Molecule ID	`rp2040-pican-castellated-v1`
Board Size	19.0 × 35.0 mm
Layers	2
MCU	RP2040 (Raspberry Pi, QFN-56)
CAN Controller	MCP251863T-E/9PX (Microchip, integrated CAN FD controller + transceiver)
Flash	W25Q128JVPIQ — 16 MB QSPI
Regulator	AP2112K-3.3 (3.3V LDO from 5V input)
USB	USB-C 2.0 with USBLC6-2P6 ESD protection
Crystal	12 MHz (RP2040), 40 MHz (MCP251863)
Castellated Pads	49 machine contacts + 4 corner machine pins
KiCad Version	7/8

Key ICs

Ref	Part	Package	Function
U4	RP2040	QFN-56	Dual-core Arm Cortex-M0+ MCU
U2	MCP251863T-E/9PX	VQFN-28	CAN FD controller + transceiver (SPI interface)
U3	W25Q128JVPIQ	WSON-8	16 MB QSPI flash
U6	AP2112K-3.3	SOT-23-5	3.3V 600mA LDO regulator
U1	USBLC6-2P6	SOT-23-6	USB ESD protection
U5	74LVC1T45	SOT-23-5	Level translator (LED data)

Machine Contact Pin Mapping

4 corner machine pins (X1–X4) for power/ground, 49 castellated contacts for signals.

Corner Machine Pins

Pin	Position	Net	Function
X1	Bottom-left (1, 7)	GND	Ground
X2	Top-left (1, -25)	+3V3	3.3V output
X3	Top-right (17, -25)	+5V	5V input
X4	Bottom-right (17, 7)	GND	Ground

Left Edge Contacts (bottom to top)

Contact	Net	Function
X54	STBY	CAN standby control
X43	nINT0/GPIO0/XSTBY	CAN interrupt 0 / GPIO0
X42	nINT1/GPIO1	CAN interrupt 1 / GPIO1
X47	nINT	CAN interrupt
X15	GPIO10	General purpose I/O
X14	GPIO9	General purpose I/O
X13	GPIO8	General purpose I/O
X12	GPIO7	General purpose I/O
X11	GPIO6	General purpose I/O
X10	GPIO5	General purpose I/O
X9	GPIO4	General purpose I/O
X8	GPIO3 / SCL1	I2C1 clock
X7	GPIO2 / SDA1	I2C1 data
X6	GPIO1 / RX0	UART0 RX
X5	GPIO0 / TX0	UART0 TX

Right Edge Contacts (bottom to top)

Contact	Net	Function
X56	CANL	CAN Low bus line
X55	CANH	CAN High bus line
X44	RXD	CAN RX data
X53	TXD	CAN TX data
X23	GPIO19	General purpose I/O
X24	GPIO20 / SDI	SPI data in
X25	GPIO21 / CS	SPI chip select
X26	GPIO22 / SCK	SPI clock
X27	GPIO23 / SDO	SPI data out
X37	GPIO24	General purpose I/O
X29	GPIO25	General purpose I/O
X30	A0 (GPIO26)	ADC channel 0
X31	A1 (GPIO27)	ADC channel 1
X32	A2 (GPIO28)	ADC channel 2
X33	A3 (GPIO29)	ADC channel 3

Top Edge Contacts (left to right)

Contact	Net	Function
X57	RST	Reset
X36	BOOT	Bootloader select
X22	GPIO17 / LED	User LED data line
X41	USB+	USB data positive
X40	USB-	USB data negative
X35	SWD_IO	SWD debug data
X34	SWD_CLK	SWD debug clock

Bottom Edge Contacts (left to right)

Contact	Net	Function
X16	GPIO11	General purpose I/O
X17	GPIO12	General purpose I/O
X18	GPIO13	General purpose I/O
X19	GPIO14	General purpose I/O
X20	GPIO15	General purpose I/O
X21	GPIO16	General purpose I/O
X38	GPIO18	General purpose I/O

CAN Bus Interface

The MCP251863T provides integrated CAN FD controller and transceiver connected to the RP2040 via SPI. Features:

CAN 2.0B and CAN FD support
On-board 120 Ω termination resistor (R20, solder jumper configurable)
CANH/CANL brought out to castellated pads X55/X56
40 MHz crystal (Y2)
Interrupt lines (nINT, nINT0, nINT1) exposed on left edge

Power

Rail	Source	Regulator
+5V	USB-C or X3 corner pin	Input rail
+3V3	AP2112K-3.3 LDO from 5V	Powers RP2040, flash, CAN controller
+1V1	RP2040 internal	Core voltage

500 mA polyfuse (F1) on USB input. Schottky diode (D3, PMEG2010BELD) for reverse protection.

Solder Jumpers

Jumper	Default	Function
JP1	Open	USB VBUS select
JP2	Bridged 1-2	Power source select
JP3	Open	CAN termination enable
JP4–JP9	Bridged	GPIO routing configuration
JP10–JP12	Bridged	CAN signal routing

Debug & Programming

USB-C: Native USB bootloader (hold BOOT + reset)
SWD: Test points TP1 (CLK) and TP2 (DIO), also on castellated pads X34/X35
BOOT button: SW1
Reset button: SW2

Fabrication

Gerber files: jlcpcb/gerber/
Production files: jlcpcb/production_files/

Issues

No GLB 3D model included in the project — packages3D_incomplete/ contains individual component models but no assembled board model
Lock files present (~*.lck) suggest the project may have been exported while open in KiCad

Source files

rp2040-pican-castellated-v1-source.tar.gz

KiCad project source bundle — schematic, PCB, GLB 3D model, custom footprints, and JLCPCB production files

file

1.8 MB

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0 revisions · Molecule # · Updated 2026-05-27 19:59:25