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DSPIC33FJ128GP802-E/MM 其他数据使用手册 - Microchip（微芯）
制造商:
Microchip（微芯）
分类:
微控制器
封装:
QFN-28
描述:
DSPIC33FJ128GP802-E/MM 管装
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DSPIC33FJ128GP802-E/MM数据手册
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© 2009 Microchip Technology Inc. DS01249A-page 5
AN1249
ECAN MODULE OVERVIEW
The dsPIC33F and PIC24H ECAN module implements
the CAN Protocol 2.0B, which is used in a variety of
applications. The differential serial data communication
has been designed to be a robust means of
communication in an electrically noisy environment.
The ECAN module consists of a CAN protocol engine
and message filters, along with masks and a transmit
and receive interface with the DMA module.
The ECAN module can operate in one of the following
user-selectable modes:
• Configuration mode
• Normal mode
• Listen only mode
• Listen All Messages mode
• Loopback mode
• Disable mode
For a detailed description of these operating modes,
refer to Section 21. “Enhanced Controller Area
Network (ECAN™)” (see “References”). Normal
mode of operation is the most widely used mode for the
ECAN peripheral. The peripheral is designed to be
used with the DMA module for dsPIC33F and PIC24H
devices.
It can also be used without DMA to send and receive
messages from the CAN bus. However, this method is
not recommended as it defeats the advanced
architecture of the dsPIC33F and PIC24H devices.
FIGURE 4: ECAN™ MODULE
Transmit Buffer
TXB0/
RXB0
Transmit Buffer
TXB7/
RXB7
RXM0
RXM1
RXF0
RXF1
RXF2
RXF14
RXF15
Transmit Byte Sequencer
DeviceNet™
State Machine
Message Assembly Buffer (MAB)
DMA RAM Space
Receive Error Counter
BIT Timing Logic
Shift/CRC/Destuff
Comparator
CRC<14:0>
Protocol Machine
CAN 2.0B Engine Receive Module
RXB8
RXB31
TXB0/RXB0
TXB7/RXB7
RXB30
DMA RAM Space
Acceptance Masks
Transmitter Module
Acceptance Filters
RXM2
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