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Freescale Semiconductor Electronic Components Datasheet



MC33976

Dual Gauge Driver



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Freescale Semiconductor
Technical Data
Dual Gauge Driver with
Configurable Response Time
Document Number: MC33976
Rev. 3.0, 8/2006
33976
The 33976 is a single-packaged, Serial Peripheral Interface (SPI)
controlled, dual step 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 step motor,
similar to an MMT-licensed AFIC 6405 or Switec MS-X15.xxx motor.
The 33976 is ideal for use in automotive instrumentation systems
requiring distributed and flexible step motor gauge driving. The
device also eases the transition to step motors from air core motors
by emulating the air core pointer movement with little additional
processor bandwidth utilization.
Features
•MMT-Licensed Two-Phase Step Motor Compatible
•Switec MS-X15.xxx Step Motor Compatible
•Minimal Processor Overhead Required
•Fully Integrated Pointer Movement and Position State Machine
with Channel-Independent Configurable Pointer Movement
•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/Degree of Pointer Movement)
•Pointer Calibration and Return to Zero (RTZ)
•SPI-Controlled 16-Bit Word
•Calibratable Internal Clock
•Low Sleep Mode Current
•Pb-Free Packaging Designated by Suffix Code EG
CONFIGURABLE DUAL GAUGE DRIVER
DW SUFFIX
EG SUFFIX (PB-FREE)
98ASB42344B
24-LEAD SOICW
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC33976DW/R2
MCZ33976EG/R2
-40°C to 125°C
24 SOICW
VPWR
5.0 V
VDD
Regulator
MCU
33976
VPWR
VDD
SIN0+
SIN0-
COS0+
COS0-
RTZ SIN1+
RST SIN1-
CS
SCLK
SI
SO
COS1+
COS1-
GND
Motor 0
Motor 1
Figure 1. 33976 Simplified Application Diagram
Freescale Semiconductor, Inc. reserves the right to change the detail specifications,
as may be required, to permit improvements in the design of its products.
© Freescale Semiconductor, Inc., 2006. All rights reserved.



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INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
VDD
VPWR
Internal
Regulator
CS
SCLK
SO
SI
SPI
COS0
SIN0
COS1
RST
Logic
Under-
and
Overvoltage
Detect
Oscillator
H-Bridge
ILIM
and
Control
Overtemperature
Detect
SIN1
GND (8)
COS0+
COS0-
SIN0+
SIN0-
COS1+
COS1-
RTZ
RTZ
SIN1+
SIN1-
Figure 2. 33976 Simplified Internal Block Diagram
33976
2
Analog Integrated Circuit Device Data
Freescale Semiconductor



Part Number MC33976
Description Dual Gauge Driver
Maker Freescale Semiconductor - Freescale Semiconductor
Total Page 30 Pages
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