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Stand-alone CAN controller with SPI

MCP2515 Working Principle

Learn how MCP2515 works with an illustrated explanation and practical readings.

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MCP2515 at a glance

Follow the labeled connections and functional stages

MCP2515 working principle: illustrated functional stages, basic circuit and connections
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How it works

3 stages · Explore one step at a time

Step 1 / 3

Configure through SPI

Reset, wait for oscillator startup and confirm Configuration mode before programming timing, masks and filters.

Step 2 / 3

Buffer and arbitrate

Load an identifier and up to eight bytes into a transmit buffer, then request transmission. The engine handles arbitration and protocol errors.

Step 3 / 3

Receive and service

Accepted frames enter receive buffers. Enabled flags assert INT; firmware reads the message and clears or services the cause.

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