S9S12G48F1CLC Datasheet, PDF (583/1292 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 18
Freescale’s Scalable Controller Area Network
(S12MSCANV3)
Revision
Number
Revision Date
V03.11
V03.12
V03.13
31 Mar 2009
09 Aug 2010
03 Mar 2011
Table 18-1. Revision History
Sections
Affected
Table 18-37
Figure 18-4
Table 18-3
Description of Changes
• Orthographic corrections
• Added ‘Bosch CAN 2.0A/B’ to bit time settings table
• Corrected CANE write restrictions
• Removed footnote from RXFRM bit
18.1 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.
MC9S12G Family Reference Manual, Rev.1.23
Freescale Semiconductor
585