s908az32ag2cfue Freescale Semiconductor, Inc, s908az32ag2cfue Datasheet - Page 263

• Manufacturer Part Number: s908az32ag2cfue
• Description: M68hc08 Microcontrollers 8-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 24
MSCAN Controller (MSCAN08)
24.1 Introduction
The MSCAN08 is the specific implementation of the scalable controller area network (MSCAN) concept
targeted for the Freescale M68HC08 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.
The CAN protocol was primarily, but not exclusively, designed to be used as a vehicle serial data bus,
meeting the specific requirements of this field: real-time processing, reliable operation in the
electromagnetic interference (EMI) environment of a vehicle, cost-effectiveness and required bandwidth.
MSCAN08 utilizes an advanced buffer arrangement, resulting in a predictable real-time behavior, and
simplifies the application software.
24.2 Features
Basic features of the MSCAN08 are:
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Modular Architecture
Implementation of the CAN Protocol — Version 2.0A/B
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Support for Remote Frames
Double-Buffered Receive Storage Scheme
Triple-Buffered Transmit Storage Scheme with Internal Prioritisation Using a “Local Priority”
Concept
Flexible Maskable Identifier Filter Supports Alternatively One Full Size Extended Identifier Filter or
Two 16-Bit Filters or Four 8-Bit Filters
Programmable Wakeup Functionality with Integrated Low-Pass Filter
Programmable Loop-Back Mode Supports Self-Test Operation
Separate Signalling and Interrupt Capabilities for All CAN Receiver and Transmitter Error States
(Warning, Error Passive, Bus Off)
Programmable MSCAN08 Clock Source Either CPU Bus Clock or Crystal Oscillator Output
Programmable Link to On-Chip Timer Interface Module (TIMB) for Time-Stamping and Network
Synchronization
Low-Power Sleep Mode
Standard and Extended Data Frames.
0–8 Bytes Data Length.
Programmable Bit Rate up to 1 Mbps Depending on the Actual Bit Timing and the Clock Jitter
of the PLL
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