Using MCP2515 on Board

3:04

Project

File

Using Knowledge Base Tool.

Looking for "Oscillator, crystal frequency, external crystal connection OSC1 OSC2" in MCP2515-Stand-Alone-CAN-Controller-with-SPI-20001801J.pdf

Looking for "TXCAN RXCAN connection to CAN transceiver typical application" in MCP2515-Stand-Alone-CAN-Controller-with-SPI-20001801J.pdf

Looking for "Recommended operating conditions supply voltage VDD" in MCP2515-Stand-Alone-CAN-Controller-with-SPI-20001801J.pdf

Looking for "RESET pin description" in MCP2515-Stand-Alone-CAN-Controller-with-SPI-20001801J.pdf

Looking for "INT pin description" in MCP2515-Stand-Alone-CAN-Controller-with-SPI-20001801J.pdf

Looking for "SPI pins CS SCK SI SO interface description" in MCP2515-Stand-Alone-CAN-Controller-with-SPI-20001801J.pdf

Looking for "RTS pins TX0RTS TX1RTS TX2RTS description" in MCP2515-Stand-Alone-CAN-Controller-with-SPI-20001801J.pdf

Looking for "CLKOUT/SOF pin description" in MCP2515-Stand-Alone-CAN-Controller-with-SPI-20001801J.pdf

Great question. Here’s how to integrate the MCP2515-I/ST on your board, step by step.

Power and decoupling

Tie VDD to your logic rail and VSS to ground. Datasheet: “Supply Voltage 2.7 V to 5.5 V.”
Place a 100nF Capacitor and a 1uF Capacitor close to VDD–VSS. Per best practice, ensure capacitors “operate at no more than 60% of their maximum rated voltage.”

Clock (crystal or external clock)

If using a crystal, connect it between OSC1 and OSC2 with load capacitors as per the crystal spec and datasheet. Datasheet: “designed to operate with a crystal or ceramic resonator connected to the OSC1 and OSC2 pins… requires the use of a parallel cut crystal.”
Example tested values (datasheet): “4 MHz: C1=27 pF, C2=27 pF; 8 MHz: C1=22 pF, C2=22 pF; 20 MHz: C1=15 pF, C2=15 pF.”
You can also drive OSC1 from an external clock if preferred.

MCU SPI interface and interrupt

Connect MCU SPI to SCK, SI, SO, and chip select ~CS. Datasheet: “High-Speed SPI Interface (10 MHz): SPI modes 0,0 and 1,1… CS must be held low while any operation is performed.”
Route ~INT to an MCU interrupt-capable GPIO.
For signal integrity on fast edges, add 22–33 Ω series resistors near the MCU on SCK/MOSI per best practice: use 33Ω Resistor.

Reset pin

Pull ~RESET up to VDD with a 10kΩ Resistor. Optionally add an RC for power-on reset.
Datasheet: “It is highly recommended that the RESET command be sent (or the RESET pin be lowered) as part of the power-on initialization sequence… device is held in Reset for a minimum of 2 µs after VDD reaches the operating voltage (tRL).”

CAN physical layer (requires a transceiver)

Connect TXCAN and RXCAN to a CAN transceiver (logic-level compatible with your VDD), then from the transceiver to CANH/CANL. Datasheet shows the “Example System Implementation” with an external transceiver.
Typical 3.3 V transceiver: SN65HVD230. Typical 5 V transceiver: MCP2551.
Terminate the CAN bus with a 120Ω Resistor at each end. Best practice: “include 120Ω termination resistors.”

Optional/other pins

CLKOUT/SOF: optional clock out or Start-of-Frame indicator; leave unconnected if unused.
~TX0RTS, ~TX1RTS, ~TX2RTS: configurable Request-to-Send inputs or general inputs; leave as inputs if not used. Datasheet: “The TXnRTS pins are input pins that can be configured as… Request-to-Send inputs… or standard digital inputs.”
~RX0BF, ~RX1BF: optional buffer-full/interrupt outputs; tie to MCU GPIOs if you want per-buffer interrupts, otherwise leave unconnected.

Quick placement/layout notes

Keep decoupling close to VDD–VSS.
Short, symmetric crystal routing at OSC1/OSC2.
Short SPI traces; add series damping (22–33 Ω) as above.
Place the CAN transceiver near the connector that goes to the harness; keep the CANH/CANL pair tightly coupled and routed as a differential pair.

Do you plan to run the MCP2515 at 3.3 V or 5 V, and which MCU are you using? If you want, I can add the MCP2515, a matching CAN transceiver, crystal, and basic passives to your project and wire the essentials—just say the word.

Set voltage and MCU

Differential pair rule

RC time constant

Find LDO regulator

129 days

Ready.

SCK

OSC2

RXCAN

~TX0RTS

VSS

~RX0BF

~CS

~INT

CLKOUT/SOF

TXCAN

~RX1BF

~RESET

OSC1

VDD

~TX2RTS

~TX1RTS

Reviews

Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Net Portal
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
jharwinbarrozo
43.0M
Power Net Portal
Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
jharwinbarrozo
11.4M
Generic Resistor
A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Inductor
A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
jharwinbarrozo
15.5k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
jharwinbarrozo
1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
jharwinbarrozo
1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
jharwinbarrozo
1.1M