资料介绍
Controller Area Network (CAN) was initially created by
German automotive system supplier Robert Bosch in
the mid-1980s for automotive applications as a method
for enabling robust serial communication. The goal was
to make automobiles more reliable, safe and fuel-effi-
cient while decreasing wiring harness weight and com-
plexity. Since its inception, the CAN protocol has gained
widespread popularity in industrial automation and
automotive/truck applications. Other markets where
networked solutions can bring attractive benefits like
medical equipment, test equipment and mobile
machines are also starting to utilize the benefits of CAN.
The goal of this application note is to explain some of
the basics of CAN and show the benefits of choosing
CAN for embedded systems networked applications. AN713
Controller Area Network (CAN) Basics
ISO11898 is a standard for high-speed applications,
Author: Keith Pazul ISO11519 is a standard for low-speed applications, and
Microchip Technology Inc. J1939 (from SAE) is targeted for truck and bus applica-
tions. All three of these protocols specify a 5V differen-
tial electrical bus as the physical interface.
INTRODUCTION Th
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