MC9S12HY64 Datasheet, PDF (307/792 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Chapter 9
Freescale’s Scalable Controller Area Network
(S12MSCANV3)
Table 9-1. Revision History
Revision
Number
Revision Date
Sections
Affected
Description of Changes
V03.08
V03.09
V03.10
07 Mar 2006
04 May 2007
19 Aug 2008
- Internal updates only.
9.3.2.11/9-325 - Corrected mnemonics of code example in CANTBSEL register description
9.4.7.4/9-359
9.4.4.5/9-353
9.2/9-310
- Corrected wake-up description
- Relocated initialization section
- Added note to external pin descriptions for use with integrated physical layer
- Minor corrections
9.1 Introduction
Freescale’s scalable controller area network (S12MSCANV3) definition is based on the MSCAN12
definition, which is the specific implementation of the MSCAN concept targeted for the M68HC12
microcontroller family.
The module is a communication controller implementing the CAN 2.0A/B protocol as defined in the
Bosch specification dated September 1991. For users to fully understand the MSCAN specification, it is
recommended that the Bosch specification be read first to familiarize the reader with the terms and
concepts contained within this document.
Though not exclusively intended for automotive applications, CAN protocol is designed to meet the
specific requirements of a vehicle serial data bus: real-time processing, reliable operation in the EMI
environment of a vehicle, cost-effectiveness, and required bandwidth.
MSCAN uses an advanced buffer arrangement resulting in predictable real-time behavior and simplified
application software.
MC9S12HY/HA-Family Reference Manual, Rev. 1.04
Freescale Semiconductor
307