Microchip logo
  • All
  • Products
  • Documents
  • Applications Notes

AN816

Title:
A CAN System Using Multiple MCP25050 I/O Expanders
Name:
AN816
Date:
11/04/2002
Author:
Diversified Engineering Inc., Microchip Technology Inc.
Description:
The MCP25050 I/O Expander is an effective device that is used in a Controller Area Network (CAN) which operates without the use of a microcontroller. It supports CAN V2.0B with bit rates up to 1Mb/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 communications 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 communication that natively supports I/O Expander Nodes. The CAN-NET framework allows users to develop a proprietary protocol for use by their own products.
Keywords:
CAN,Controller Area Network,I/O Expander
 
Application Notes & Source Code
 Last Updated
Size
 
  AN816
  03/14/2004
  415KB
  AN816 Source Code
  02/28/2005
  37KB
Silicon Products