HC705E5GRSSLASHD datasheet(72/148 Pages) NXP

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Motorola Bus (M Bus) Interface

General Release Specification

MC68HC705E5 — Rev. 1.0

Motorola Bus (M Bus) Interface

11.8.6

Slave Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

11.8.7

Arbitration Lost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

11.9

Operation During Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . .93

11.10 Operation During Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . .93

11.2 Introduction

Motorola bus (M bus) is a 2-wire, bidirectional serial bus which provides

a simple, efficient way for data exchange between devices. It is fully

compatible to I2C bus standards and is similar to the MC68HC05T10.

This bus is suitable for applications that require frequent

communications over a short distance between a number of devices. It

also provides a flexibility that allows additional devices to be connected

to the bus. The maximum data rate is limited to 100 Kbits and the

maximum communication distance and number of devices that can be

connected is limited by the maximum bus capacitance of 400 pF.

The M-bus system is a true multimaster bus including collision detection

and arbitration to prevent data corruption if two or more masters intend

to control the bus simultaneously. This feature provides the capability for

complex applications with multiprocessor control. It may also be used for

rapid testing and alignment of end products by way of external

connections to an assembly-line computer.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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