70353C datasheet(2/76 Pages) MICROCHIP

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dsPIC33E/PIC24E Family Reference Manual

DS70353C-page 21-2

21.1

INTRODUCTION

The dsPIC33E/PIC24E Enhanced Controller Area Network (ECAN™) module implements the

CAN Specification 2.0B, which is used primarily in industrial and automotive applications. This

asynchronous serial data communication protocol provides reliable communications in an

electrically noisy environment. Figure 21-1 illustrates a typical CAN bus topology.

Figure 21-1:

Typical CAN Bus Network

The ECAN module supports the following key features:

• Standards Compliance:

- Full CAN 2.0B compliance

- Programmable bit rate up to 1 Mbps

• Message Reception:

- 32 message buffers – all of which can be used for reception

- 16 acceptance filters for message filtering

- Three acceptance filter mask registers for message filtering

- Automatic response to Remote Frame

- Up to 32-message deep First-In-First-Out (FIFO) buffer

- DeviceNet™ addressing support

- Direct Memory Access (DMA) interface for message reception

• Message Transmission:

- Eight message buffers configurable for message transmission

- User-defined priority levels for message buffers used for transmission

- DMA interface for message transmission

• Other Features:

- Loopback, Listen All Messages and Listen-Only modes for self-test, system

diagnostics and bus monitoring

- Low-power operating modes

Note:

This family reference manual section is meant to serve as a complement to device

data sheets. Depending on the device variant, this manual section may not apply to

all dsPIC33E/PIC24E devices.

Please consult the note at the beginning of the “Enhanced Controller Area

Network (ECAN™)” chapter in the current device data sheet to check whether this

document supports the device you are using.

Device data sheets and family reference manual sections are available for

download from the Microchip Worldwide Web site at: http://www.microchip.com

CAN

Bus

ECANi

PIC® MCU

with Integrated

ECAN

CAN

Transceiver

dsPIC33F/PIC24H

with Integrated

ECAN™

dsPIC30F

with Integrated

CAN

Transceiver

CAN

Transceiver

CAN

Transceiver

CAN

dsPIC33E/PIC24E

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