Microchip dsPIC33FJ32GP302 Manual

Microchip Ikke kategoriseret dsPIC33FJ32GP302

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Side 1/78
2007-2020 Microchip Technology Inc. DS70000185D-page 1
HIGHLIGHTS
This section of the manual contains the following major topics:
1.0 Introduction ....................................................................................................................... 2
2.0 CAN Message Formats..................................................................................................... 4
3.0 Register Maps................................................................................................................... 8
4.0 CAN Registers ................................................................................................................ 15
5.0 CAN Message Buffers .................................................................................................... 34
6.0 Bit Timing ........................................................................................................................ 38
7.0 CAN Operating Modes.................................................................................................... 42
8.0 Transmitting CAN Messages .......................................................................................... 43
9.0 Receiving CAN Messages .............................................................................................. 50
10.0 DMA Controller Configuration ......................................................................................... 63
11.0 CAN Error Management ................................................................................................. 66
12.0 CAN Interrupts ................................................................................................................ 69
13.0 CAN Low-Power Modes.................................................................................................. 72
14.0 CAN Time Stamping Using Input Capture ...................................................................... 72
15.0 Related Application Notes............................................................................................... 73
16.0 Revision History .............................................................................................................. 74
Enhanced Controller Area Network (CAN)
dsPIC33F/PIC24H Family Reference Manual
DS70000185D-page 2 2007-2020 Microchip Technology Inc.
1.0 INTRODUCTION
The dsPIC33F/PIC24H Enhanced Controller Area Network (CAN) module implements the CAN
Protocol 2.0B, used primarily in industrial and automotive applications. This asynchronous serial
data communication protocol provides reliable communications in electrically noisy environ-
ments. The dsPIC33F device family integrates up to two CAN modules. Figure 1-1 illustrates a
typical CAN bus topology.
Figure 1-1: Typical CAN Bus Network
The CAN 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 them can be used for reception
• 16 acceptance filters for message filtering
• Three acceptance filter mask registers for message filtering
• Automatic response to Remote Transmit Request
• Up to 32-message deep First-In First-Out (FIFO) buffer
• DeviceNet™ addressing support
• DMA interface for message reception
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 dsPIC33/PIC24 devices.
Please consult the note at the beginning of the “Direct Memory Access (DMA)”
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 Website at: http://www.microchip.com
CAN
bus
CAN1
PIC® MCU
with Integrated
CAN
CAN
Transceiver
dsPIC33F/PIC24H
with Integrated
CAN™
dsPIC33/PIC24
with Integrated
CAN
Transceiver
CAN Transceiver
CAN
Transceiver
CAN
CAN2
CAN
Transceiver
dsPIC33F/PIC24H

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Model: dsPIC33FJ32GP302

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