13/14

OVERVIEW OF ENHANCED CAN CONTROLLERS FOR ST7 AND ST9 MCUS

5 CONCLUSION

These two new CAN controllers bxCAN and beCAN have been designed to meet the require-

ments of today’s and tomorrow’s automotive body applications.

In particular CAN message filtering (this CPU resources consuming and difficult to evaluate

task) has been optimized by the implementation of the „identifier list“ concept and the in-

creased number of filters. Freed from the filtering task, the CPU can completely focus on the

application tasks.

With eight filters and two independent receive FIFOs, bxCAN can easily handle a high number

and different types of well selected messages. This is an ideal CAN interface for decentralized

gateways and all applications with high capacity communications requirements.