MC33977DW datasheet(1/37 Pages) FREESCALE

Part #	MC33977DW

Description	Single Gauge Driver

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Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

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Freescale Semiconductor, Inc. reserves the right to change the detail specifications,

as may be required, to permit improvements in the design of its products.

Document Number: MC33977

Rev. 2.0, 1/2007

Freescale Semiconductor

Technical Data

Single Gauge Driver

The 33977 is a Serial Peripheral Interface (SPI) Controlled, stepper

motor gauge driver Integrated Circuit (IC). This monolithic IC consists

of a dual H-Bridge coil driver and its associated control logic. The H-

Bridge drivers are used to automatically control the speed, direction,

and magnitude of current through the coils of a two-phase

instrumentation stepper motor, similar to an MMT-licensed AFIC 6405

of Switec MS-X156.xxx motor.

The 33977 is ideal for use in instrumentation systems requiring

distributed and flexible stepper motor gauge driving. The device also

eases the transition to stepper motors from air core motors by

emulating the damped air core pointer movement.

Features

• MMT-Licensed Two-Phase Stepper Motor Compatible

• Switec MS-X15.xxx Stepper Motor Compatible

• Minimal Processor Overhead Required

• Fully Integrated Pointer Movement and Position State Machine

with Air Core Movement Emulation

• 4096 Possible Steady State Pointer Positions

• 340° Maximum Pointer Sweep

• Maximum Acceleration of 4500°/s2

• Maximum Pointer Velocity of 400°/s

• Analog Microstepping (12 Steps/Degrees of Pointer Movement)

• Pointer Calibration and Return to Zero (RTZ)

• Controlled via 16-Bit SPI Messages

• Internal Clock Capable of Calibration

• Low Sleep Mode Current

• Pb-Free Packaging Designated by suffix code EG

Figure 1. 33977 Simplified Application Diagram

ORDERING INFORMATION

Device

Temperature

Range (TA)

Package

MC33977DW/R2

-40°C to 125°C

24 SOICW

MCZ33977EG/R2

33977

SINGLE GAUGE DRIVER

DW SUFFIX

98ASB42344B

24-PIN SOICW

EG SUFFIX (Pb-FREE)

5.0 V

Regulator

MCU

VPWR

33977

VDD

RTZ

RST

CS

SCLK

SI

SO

GND

Motor

SIN+

SIN-

COS+

COS-

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