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Freescale Semiconductor Electronic Components Datasheet



MC33977

Single Gauge Driver



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MC33977 pdf
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Technical Data
Document Number: MC33977
Rev. 2.0, 1/2007
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.
33977
SINGLE GAUGE DRIVER
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
DW SUFFIX
EG SUFFIX (Pb-FREE)
98ASB42344B
24-PIN SOICW
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC33977DW/R2
MCZ33977EG/R2
-40°C to 125°C
24 SOICW
VPWR
5.0 V VDD
Regulator
MCU
33977
VPWR
VDD
SIN+
SIN-
RTZ
RST
CS
SCLK
SI
SO
GND
COS+
COS-
Motor
Figure 1. 33977 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., 2007. All rights reserved.



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INTERNAL BLOCK DIAGRAM
VDD
CS
SCLK
SO
SI
SPI
INTERNAL BLOCK DIAGRAM
VPWR
INTERNAL
REGULATOR
COS
COS+
COS-
RST
LOGIC
UNDER-
AND
OVERVOLTAGE
DETECT
STATE
MACHINE
ILIM
H-BRIDGE
AND
CONTROL
OVERTEMPERATURE
DETECT
SIN
OSCILLATOR
SIGMA-DELTA
ADC
AGND
MULTIPLEXER
SIN+
SIN-
VDD
RTZ
GND (8)
Figure 2. 33977 Simplified Internal Block Diagram
33977
2
Analog Integrated Circuit Device Data
Freescale Semiconductor



Part Number MC33977
Description Single Gauge Driver
Maker Freescale Semiconductor - Freescale Semiconductor
Total Page 30 Pages
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