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Freescale Semiconductor Electronic Components Datasheet

MC33976 Datasheet

Dual Gauge Driver

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MC33976 pdf
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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.



Freescale Semiconductor Electronic Components Datasheet

MC33976 Datasheet

Dual Gauge Driver

No Preview Available !

MC33976 pdf
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



Freescale Semiconductor Electronic Components Datasheet

MC33976 Datasheet

Dual Gauge Driver

No Preview Available !

MC33976 pdf
PIN CONNECTIONS
PIN CONNECTIONS
COS0+
COS0-
SIN0+
SIN0-
GND
GND
GND
GND
CS
SCLK
SO
SI
1
2
3
4
5
6
7
8
9
10
11
12
24 COS1+
23 COS1-
22 SIN1+
21 SIN1-
20 GND
19 GND
18 GND
17 GND
16 VPWR
15 RST
14 VDD
13 RTZ
Figure 3. 33976 Pin Connections
Table 1. 33976 Pin Definitions
Pin
Number
Pin
Name
Pin
Function
1
2
3
4
5 – 8,
17– 20
(MS Motor Pin #)
COS0+ (MS #4)
COS0(MS #3)
SIN0+(MS #1)
SIN0(MS #2)
GND
Output
Ground
9 CS Input
10
SCLK
Input
11 SO Output
12 SI Input
13 RTZ Output
14
VDD
Input
15
RST
Input
16
VPWR
Input
(MS Motor Pin #) Output
21 SIN1(MS #2)
22 SIN1+(MS #1)
23 COS1(MS #3)
24 COS1+(MS #4)
Formal Name
Definition
H-Bridge Outputs 0 Each pin is the output pin of a half bridge, designed to source or sink
current.
Ground
Chip Select
Serial Clock
Serial Output
Serial Input
Multiplexed Output
Voltage
Reset
Battery Voltage
H-Bridge Outputs 1
These pins serve as the ground for the source of the low-side output
transistors as well as the logic portion of the device.
This pin is connected to a chip select output of a LSI IC.
This pin is connected to the SCLK pin of the master device and acts
as a bit clock for the SPI port.
This pin is connected to the SPI Serial Data Input pin of the master
device or to the SI pin of the next device in a daisy chain.
This pin is connected to the SPI Serial Data Output pin of the master
device from which it receives output command data.
This is the multiplexed output pin of the non-driven coil during a
Return to Zero (RTZ) event.
This SPI and logic power supply input will work with 5.0 V supplies.
This input has an internal active pull-up.
Power supply.
Each of these pins is the output pin of a half bridge, designed to
source or sink current.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33976
3




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