Datasheet

Table Of Contents
MC9S12DP256 — Revision 1.1
MSCAN
MSCAN
MSCAN
Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 491
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 492
Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 493
External Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 494
Register Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 496
Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 499
Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 512
Modes of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 546
Low Power Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 547
Interrupt Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 553
Overview
The Motorola Scalable Controller Area Network (MSCAN) definition is
based on the MSCAN12 definition which is the specific implementation
of the Motorola Scalable CAN concept targeted for the Motorola
MC68HC12 Microcontroller Family.
The module is a communication controller implementing the CAN 2.0
A/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.
The CAN protocol was primarily, but not only, designed to be used as a
vehicle serial data bus, meeting the specific requirements of this field:
real-time processing, reliable operation in the EMI environment of a
vehicle, cost-effectiveness and required bandwidth.
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