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MC9S12VR-Family - Data Sheet - Freescale Semiconductor

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Chapter 14<br />

Low-Side Drivers - LSDRV (S12LSDRV1)<br />

Rev. No.<br />

(Item No.)<br />

V01.00<br />

V1.01<br />

V1.02<br />

V1.03<br />

Date<br />

(Submitted By)<br />

14.1 Introduction<br />

Table 14-1. Revision History Table<br />

NOTE<br />

The information given in this section are preliminary and should be used as<br />

a guide only. Values in this section cannot be guaranteed by <strong>Freescale</strong> and<br />

are subject to change without notice.<br />

The LSDRV module provides two low-side drivers typically used to drive inductive loads (relays).<br />

14.1.1 Features<br />

Sections<br />

Affected<br />

10 December<br />

2010 All -Initial Version<br />

Substantial Change(s)<br />

22 February<br />

2011 All - Added clarification to open-load mechanism in over-current conditions<br />

12 April<br />

2011 All<br />

3 April<br />

2011<br />

Register<br />

Descriptions for<br />

LSDR and<br />

LSCR<br />

- improved clarification to open-load mechanism in over-current conditions<br />

- corrected typos<br />

- added Note on considering settling time t LS_settling to LSDR and LSCR<br />

register description<br />

- added Note on how to disable the low-side driver to LSDR register<br />

description<br />

The LSDRV module includes two independent low side drivers with common current sink. Each driver has<br />

the following features:<br />

• Selectable gate control of low-side switches: LSDRx register bits, PWM or timer channels. See<br />

PIM chapter for routing options.<br />

• Open-load detection while enabled<br />

– While driver off: selectable high-load resistance open-load detection<br />

• Over-current protection with shutdown and interrupt while enabled<br />

<strong>MC9S12VR</strong> <strong>Family</strong> Reference Manual, Rev. 2.8<br />

<strong>Freescale</strong> <strong>Semiconductor</strong> 409

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