33991

Freescale Semiconductor Technical Data Gauge Driver Integrated Circuit This 33991 is a single packaged, Serial Peripheral Interface (SPI) controlled, dual stepper motor gauge driver Integrated Circuit (IC). This monolithic IC consists of four dual output H-Bridge coil drivers and the associated control logic. Each pair of H-Bridge drivers is used to automatically control the speed, direction and magnitude of current through the two coils of a two-phase instrumentation stepper motor, similar to an MMT licensed AFIC 6405. This device is ideal for use in automotive 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 air core pointer movement with little additional processor bandwidth utilization. The device has many attractive features including: Features MMT-Licensed Two-Phase 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 Linear 4500° 2 Maximum Pointer Velocity of 400° Analog Microstepping (12 Steps/Degree of Pointer Movement) Pointer Calibration and Return to Zero SPI Controlled 16-Bit Word Calibratable Internal Clock Low Sleep Mode Current Pb-Free Packaging Designated by Suffix Code EG Document Number: MC33991 Rev. 2.0, 11/2006 33991 GAUGE DRIVE...