资料介绍
The MCP25050 I/O Expander is an effective device
used in a Controller Area Network (CAN), which oper-ates without the use of a microcontroller. It supports
CAN V2.0B with bit rates up to 1 Mb/s. Since the I/O
Expander is a stand-alone device, it can be configured
to user defaults using a software template. These
defaults are stored in non-volatile EPROM. A network
protocol must be chosen that supports a Master Node.
The Master Node is required for peer-to-peer commu-nications between I/O Expander Nodes and, therefore,
handles communication to and from all I/O Expander
Nodes. For this design, we have chosen the CAN-NET
protocol, which provides a generic framework for com-munication that natively supports I/O Expander Nodes.
The CAN-NET framework allows users to develop a
proprietary protocol for use by their own products.M AN816
A CAN System Using Multiple MCP25050 I/O Expanders
With the substantial I/O capability of the expanders, all
Author: Diversified Engineering Inc.
of the scissor-lift control signals are able to seamlessly
Microchip Technology Inc.
communicate with each other. The MCP25050 has
many peripherals, such as digital I/O, four 10-bit A/D
INTRODUCTION channels and two PWM outputs with up
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