MCP2515-I/ST

Controllers Overview

The MCP2515-I/ST is a stand-alone CAN controller implementing the CAN V2.0B specification at speeds up to 1 Mb/s, supporting standard and extended data frames with 0-8 byte data fields. It features three transmit buffers with prioritization and abort capabilities, alongside two receive buffers equipped with six 29-bit filters and two masks for message filtering. The device interfaces via a high-speed SPI bus operating at 10 MHz in modes 0,0 and 1,1. Powered by low-power CMOS technology, it operates on a voltage range of 2.7V to 5.5V, drawing 5 mA typically in active mode and 1 μA in sleep mode. The industrial grade variant supports temperatures from -40°C to +85°C and utilizes a 20-pin TSSOP package.

Controllers Feature Summary

• Implements CAN V2.0B protocol with support for standard and extended data and remote frames.
• Includes hardware message filtering using two acceptance masks and six acceptance filters to reduce host MCU overhead.
• Features three transmit buffers with configurable priority levels and abort functionality.
• Provides a high-speed SPI interface compatible with standard microcontrollers.

Controllers Applications

• Automotive electronic systems requiring robust CAN communication.
• Industrial control networks utilizing Controller Area Network protocols.
• Embedded systems needing stand-alone CAN interfacing via SPI.

Controllers Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature range (-40°C to +85°C) and 'ST' denotes the 20-pin TSSOP package. Confirm the datasheet revision matches the required specifications. Ensure the ordering code corresponds exactly to Microchip Technology Inc. documentation DS20001801J to avoid compatibility issues with firmware or hardware designs.

Controllers Selection Notes

Select this component when an independent CAN controller is required to offload protocol processing from the main MCU. The MCP2515-I/ST is suitable for applications demanding CAN 2.0B compliance with flexible message filtering. Consider the 20-pin TSSOP package constraints and the need for an external CAN transceiver to connect to the physical bus layer.

Controllers Part Context

The MCP2515 serves as a stand-alone solution for CAN bus integration, bridging microcontrollers and the CAN network. The '-I/ST' designation specifies the industrial temperature rating and the surface-mount TSSOP packaging format. This part is designed to simplify system design by handling all CAN protocol functions internally.

Controllers Replacement Considerations

NX8615 is documented as a compatible alternative offering similar SPI interface and CAN controller functionalities.

Controllers FAQ

How does the MCP2515 handle message filtering?

It utilizes two acceptance masks and six acceptance filters to filter out unwanted messages based on identifier matching, thereby reducing the processing load on the host MCU.

What is the function of the One-Shot mode?

One-Shot mode ensures that a message transmission is attempted only once, regardless of arbitration loss or error frames, which is required for maintaining time slots in deterministic systems like TTCAN.

Can the TXnRTS pins be used for purposes other than transmission requests?

Yes, the TXnRTS pins can be individually configured as general-purpose digital inputs if not used to request transmission for their respective transmit buffers.