MTS2916A
Dual Full-Bridge Stepper
Motor Driver
Evaluation Board
User’s Guide
2012-2013 Microchip Technology Inc.
DS50002058B
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Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
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Analog-for-the-Digital Age, Application Maestro, BodyCom,
chipKIT, chipKIT logo, CodeGuard, dsPICDEM,
dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial
Programming, ICSP, Mindi, MiWi, MPASM, MPF, MPLAB
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© 2012-2013, Microchip Technology Incorporated, Printed in
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Printed on recycled paper.
ISBN: 978-1-62077-339-0
QUALITY MANAGEMENT SYSTEM
CERTIFIED BY DNV
== ISO/TS 16949 ==
DS50002058B-page 2
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
2012-2013 Microchip Technology Inc.
MTS2916A DUAL FULL-BRIDGE
STEPPER MOTOR DRIVER
EVALUATION BOARD USER’S GUIDE
Table of Contents
Preface ........................................................................................................................... 5
Introduction............................................................................................................ 5
Document Layout .................................................................................................. 5
Conventions Used in this Guide ............................................................................ 6
Recommended Reading........................................................................................ 7
The Microchip Web Site ........................................................................................ 7
Customer Support ................................................................................................. 7
Document Revision History ................................................................................... 7
Chapter 1. Product Overview
1.1 Introduction ..................................................................................................... 9
1.2 MTS2916A Short Overview ............................................................................ 9
1.3 What is the MTS2916A Dual Full-Bridge Stepper Motor Driver
Evaluation Board? .................................................................................. 10
1.4 MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board
Kit Contents ............................................................................................ 10
Chapter 2. Installation and Operation
2.1 Introduction ................................................................................................... 11
2.2 Power Connections ...................................................................................... 11
2.3 Features ....................................................................................................... 12
2.4 Getting Started ............................................................................................. 13
2.5 Key Components .......................................................................................... 14
2.6 Modes ........................................................................................................... 14
Appendix A. Schematic and Layouts
A.1 Introduction .................................................................................................. 17
A.2 Board – Schematic ....................................................................................... 18
A.3 Board – Top Silk .......................................................................................... 19
A.4 Board – Top Pads and Silk .......................................................................... 20
A.5 Board – Bottom Copper ............................................................................... 21
Appendix B. Bill of Materials
Appendix C. Mode Sequence Diagrams
C.1 MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board
Functional Flowchart .............................................................................. 25
C.2 Single Stepping Example ............................................................................. 26
C.3 MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board
Software Flowcharts ............................................................................... 27
Worldwide Sales and Service .................................................................................... 40
2012-2013 Microchip Technology Inc.
DS50002058B-page 3
Object of Declaration: MTS2916A Dual Full-Bridge Stepper Motor Driver
Evaluation Board User’s Guide
2012-2013 Microchip Technology Inc.
DS50002058B-page 4
MTS2916A DUAL FULL-BRIDGE
STEPPER MOTOR DRIVER
EVALUATION BOARD USER’S GUIDE
Preface
NOTICE TO CUSTOMERS
All documentation becomes dated, and this manual is no exception. Microchip tools and
documentation are constantly evolving to meet customer needs, so some actual dialogs
and/or tool descriptions may differ from those in this document. Please refer to our web site
(www.microchip.com) to obtain the latest documentation available.
Documents are identified with a “DS” number. This number is located on the bottom of each
page, in front of the page number. The numbering convention for the DS number is
“DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the
document.
For the most up-to-date information on development tools, see the MPLAB® IDE online help.
Select the Help menu, and then Topics to open a list of available online help files.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board. This evaluation
board also demonstrates the capabilities of the MTS62C19A, which has the same
functionality, but different pin assignments. Items discussed in this chapter include:
•
•
•
•
•
•
Document Layout
Conventions Used in this Guide
Recommended Reading
The Microchip Web Site
Customer Support
Document Revision History
DOCUMENT LAYOUT
This document describes how to use the MTS2916A Dual Full-Bridge Stepper Motor
Driver Evaluation Board as a development tool. The manual layout is as follows:
• Chapter 1. “Product Overview” – Important information about the MTS2916A
Dual Full-Bridge Stepper Motor Driver Evaluation Board
• Chapter 2. “Installation and Operation” – Describes the initial setup of this
board and the key components
• Appendix A. “Schematic and Layouts” – Shows the schematic and board
layouts for the MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation
Board
• Appendix B. “Bill of Materials” – Lists the parts used to populate the
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board
• Appendix C. “Mode Sequence Diagrams” – Shows functional and software
flowcharts for the MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation
Board
2012-2013 Microchip Technology Inc.
DS50002058B-page 5
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
Description
Arial font:
Italic characters
Initial caps
Quotes
Underlined, italic text with
right angle bracket
Bold characters
N‘Rnnnn
Text in angle brackets < >
Courier New font:
Plain Courier New
Represents
Examples
Referenced books
Emphasized text
A window
A dialog
A menu selection
A field name in a window or
dialog
A menu path
MPLAB® IDE User’s Guide
...is the only compiler...
the Output window
the Settings dialog
select Enable Programmer
“Save project before build”
A dialog button
A tab
A number in verilog format,
where N is the total number of
digits, R is the radix and n is a
digit.
A key on the keyboard
Click OK
Click the Power tab
4‘b0010, 2‘hF1
Italic Courier New
Sample source code
Filenames
File paths
Keywords
Command-line options
Bit values
Constants
A variable argument
Square brackets [ ]
Optional arguments
Curly brackets and pipe
character: { | }
Ellipses...
Choice of mutually exclusive
arguments; an OR selection
Replaces repeated text
Represents code supplied by
user
DS50002058B-page 6
File>Save
Press <Enter>, <F1>
#define START
autoexec.bat
c:\mcc18\h
_asm, _endasm, static
-Opa+, -Opa0, 1
0xFF, ‘A’
file.o, where file can be
any valid filename
mcc18 [options] file
[options]
errorlevel {0|1}
var_name [,
var_name...]
void main (void)
{ ...
}
2012-2013 Microchip Technology Inc.
Preface
RECOMMENDED READING
This user's guide describes how to use MTS2916A Dual Full-Bridge Stepper Motor
Driver Evaluation Board. Another useful document is listed below. The following
Microchip document is available and recommended as a supplemental reference
resource.
• MTS2916A Data Sheet – “Dual Full-Bridge Motor Driver” (DS22259)
THE MICROCHIP WEB SITE
Microchip provides online support via our web site at www.microchip.com. This web
site is used as a means to make files and information easily available to customers.
Accessible by using your favorite Internet browser, the web site contains the following
information:
• Product Support – Data sheets and errata, application notes and sample
programs, design resources, user’s guides and hardware support documents,
latest software releases and archived software
• General Technical Support – Frequently Asked Questions (FAQs), technical
support requests, online discussion groups, Microchip consultant program
member listing
• Business of Microchip – Product selector and ordering guides, latest Microchip
press releases, listing of seminars and events, listings of Microchip sales offices,
distributors and factory representatives
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels:
•
•
•
•
Distributor or Representative
Local Sales Office
Field Application Engineer (FAE)
Technical Support
Customers should contact their distributor, representative or field application engineer
(FAE) for support. Local sales offices are also available to help customers. A listing of
sales offices and locations is included in the back of this document.
Technical support is available through the web site at:
http://www.microchip.com/support.
DOCUMENT REVISION HISTORY
Revision B (July 2013)
• Corrected minor error in Section 2.1 “Introduction”.
Revision A (May 2012)
• Initial Release of this Document.
2012-2013 Microchip Technology Inc.
DS50002058B-page 7
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
NOTES:
DS50002058B-page 8
2012-2013 Microchip Technology Inc.
MTS2916A DUAL FULL-BRIDGE
STEPPER MOTOR DRIVER
EVALUATION BOARD USER’S GUIDE
Chapter 1. Product Overview
1.1
INTRODUCTION
This chapter provides an overview of the MTS2916A Dual Full-Bridge Stepper Motor
Driver Evaluation Board and covers the following topics:
• MTS2916A Short Overview
• What is the MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board?
• MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board Kit Contents
1.2
MTS2916A SHORT OVERVIEW
The MTS2916A stepper motor driver is a CMOS device capable of driving both
windings of a bipolar stepper motor or bidirectionally controlling two DC motors. Only
the stepper motor application is covered by this user’s guide. Each of the two
independent H-Bridge outputs is capable of sustaining 40V and delivering 750 mA of
continuous current. The user must ensure that the thermal guidelines are followed and
the driver does not exceed the maximum junction temperature of +150°C. The driver
will typically enter in thermal shutdown at a junction temperature of +170°C. The output
current level is controlled by an internal Pulse-Width Modulation (PWM) circuit that is
configured using two logic inputs, a current sense resistor and a selectable reference
voltage.
Full, half and microstepping operations are possible with the PWM current control and
logic inputs. The maximum output current is set by a sense resistor and a user
selectable voltage reference. The evaluation board voltage reference is controlled with
the run switch and is detailed in Section 2.4.1 “Powering the MTS2916A Dual
Full-Bridge Stepper Motor Driver Evaluation Board”. Each bridge has an
independent phase input that controls the current flow direction for its specific load.
Internal clamp diodes protect against inductive voltage transients. The thermal
protection circuitry disables the outputs when the junction temperature exceeds the
thermal protection threshold. The thermal protection circuitry typically has 25°C of
hysteresis. Undervoltage lockout circuitry prevents the outputs from going active until
the logic supply voltage is high enough to assume control. No special power-up
sequencing is required.
2012-2013 Microchip Technology Inc.
DS50002058B-page 9
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
5V
C
VLOGIC
10V to 30V
VLOAD
VLOAD
PHASE1
I01
I11
Shift
Logic
Drivers
C
C
OUT1A
Power
Bridge
VREF1
Logic / µP
Current
Sense
Comparator
One-shot
OUT1B
Thermal
Shutdown
Undervoltage
Lockout
PHASE2
I02
I12
Shift
Logic
OUT2A
Drivers
Power
Bridge
Current
Sense
Comparator
VREF2
COMPIN1
COMPIN2
M
One-shot
OUT2B
RC2
Rt
RC1
Ct
Rt
SENSE1
GND
Rs
Ct
SENSE2
Rs
Rc
Cc
Rc
Cc
FIGURE 1-1:
1.3
Typical MTS2916A Stepper Motor Driver Application.
WHAT IS THE MTS2916A DUAL FULL-BRIDGE STEPPER MOTOR DRIVER
EVALUATION BOARD?
The MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board control
circuitry is designed to typically operate from a 6V to 12V logic input (internally
regulated down to 5V) and a 10V to 30V VLOAD input. VLOAD provides power to the
motor windings. Test points are generously distributed throughout the evaluation board.
This gives the user easy access and visibility, facilitating a better understanding of the
MTS2916A operating details.
1.4
MTS2916A DUAL FULL-BRIDGE STEPPER MOTOR DRIVER EVALUATION
BOARD KIT CONTENTS
The MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board kit contains
the following items:
• MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board (ADM00308)
• Important Information Sheet
DS50002058B-page 10
2012-2013 Microchip Technology Inc.
MTS2916A DUAL FULL-BRIDGE
STEPPER MOTOR DRIVER
EVALUATION BOARD USER’S GUIDE
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board demonstrates
the capabilities of the MTS2916A to control both windings of a bipolar stepper motor.
The board also demonstrates the capabilities of the MTS62C19A, which has the same
functionality, but different pin assignments. A PIC16F883 is utilized for motor control
processing.
This evaluation board incorporates features through the implementation of push-button
switches and a variable speed input potentiometer to exercise a stepper motor in
Full-Step, Half-Step, Modified Half-Step and Microstepping modes. LEDs indicate a
binary representation of which mode has been selected. The evaluation board and the
stepper motor can be powered from a single power input J1 (7 VDC to 12 VDC) with
jumper JP2 installed. For higher motor voltages, make sure JP2 is not installed, and
connect VLOAD at J4. Numerous test points have been designed into the board to allow
easy access.
2.2
POWER CONNECTIONS
The MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board uses a combination of terminal blocks, test clips and one DC power jack for power connections.
Connections are as follows:
a) Motor Output Connections:
- J2-1(A3), J2-2(A1), J2-3(B1), J2-4(B3), J2-5(TP21)
- TP11(A1), TP12(A3), TP13(B1), TP14(B3)
b) VLOAD (Motor Supply Power):
- J4-1(PGND), J4-2(VLOAD)
- TP20(PGND), TP18(VLOAD)
WARNING
Do not connect more than 16V to these motor supply connections while Jumper JP2 is
installed.
c) VLOGIC:
- J1-1(VLOGIC), J1-2(AGND)
- TP2(VLOGIC), TP5(AGND)
2012-2013 Microchip Technology Inc.
DS50002058B-page 11
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
FIGURE 2-1:
2.3
Power Connection Diagram.
FEATURES
The MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board has the
following features:
•
•
•
•
Push Button mode, Run, Hold and Direction control
Potentiometer variable speed adjustment
LED mode indication
Maximum winding current with the combination of Rs, VREF and conditioning of
I0/I1 logic inputs
• PICkit™ Programming connector (J5) to implement user-created code
DS50002058B-page 12
2012-2013 Microchip Technology Inc.
Installation and Operation
2.4
GETTING STARTED
The MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board is fully
assembled and tested driving a dual coil bipolar stepper motor.
2.4.1
Powering the MTS2916A Dual Full-Bridge Stepper Motor Driver
Evaluation Board
Follow these steps to power-up the board:
1. With the supply turned OFF, connect the power to the logic portion of the
evaluation board at J1 with the specified voltage (7 VDC to 12 VDC). The logic
portion of the evaluation board will typically draw less than 50 mA.
2. If the user’s stepper motor requires a voltage that is compatible with the logic
supply voltage and the user’s source can handle driving the stepper motor
windings, install JP2. DO NOT connect power at J4. If powering up the stepper
from an additional supply, DO NOT install JP2 and connect the stepper motor
supply to J4. J1 power will still be required for the logic supply.
3. Connect the bipolar stepper windings to J2 per the schematic diagram.
4. Turn ON the power supplies. Power sequencing is not required due to the undervoltage lockout circuitry.
5. Toggle the Mode switch to cycle through the five modes, as indicated by the
binary LED count.
6. Press the Run switch once to tell the PIC16F883 to send drive information to the
MTS2916A with minimal (1V) VREF. Subsequent Run presses increase VREF by
approximately 1V up to 5V maximum. This increases the current regulation
threshold.
7. The Hold switch tells the PIC16F883 to command the MTS2916A to hold the
motor position.
8. The Direction switch tells the PIC16F883 to command the MTS2916A to change
the direction of the motor.
9. The Speed Adjust Potentiometer (R4) varies an analog voltage that is read by
the PIC16F883 Analog-to-Digital Converter, and varies the speed accordingly.
Logic inputs I0 and I1 control load current levels are shown in Table 2-1:
TABLE 2-1:
I0
CURRENT LEVEL CONTROL
I1
Comparator Trip Voltage
Output Current
0
0
VTRIP = 1/10 x VREF
IMAX = VREF/10 x RS
1
0
VTRIP = 1/15 x VREF
2/3 x IMAX = VREF/15 x RS
0
1
VTRIP = 1/30 x VREF
1/3 x IMAX = VREF/30 x RS
1
1
x
0 (no current)
2012-2013 Microchip Technology Inc.
DS50002058B-page 13
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
2.5
KEY COMPONENTS
Some of the key components on the evaluation board may need to be adjusted,
depending on the characteristics of the utilized motor. The fixed Off Time (tOFF) is set
by the combination of Rt and Ct and is determined by the expression:
tOFF = 1.1 x Rt x Ct.
The evaluation board is designed with tOFF = 24.2 µs.
The amount of time it takes for the winding current to reach the regulation point is
determined by multiple factors, such as motor voltage, inductance, resistance and the
set point threshold.
The set point threshold is determined by the states of I0/I1, VREF and the sense
resistance value. For details on set point thresholds and component values, see the
MTS2916A Data Sheet (DS22259).
Explaining the effects of the motor characteristics is beyond the scope of this user’s
guide; however, the tOFF time of 24.2 µs was chosen to cover most motor applications
while trying to maintain a switching frequency above the 20 kHz audible range.
There is a single pole filter in the sense feedback used to set a break frequency of
approximately 80 kHz. Depending on the application, this break frequency may need
to be adjusted. This may be apparent when designing to regulate at low currents.
2.6
MODES
The following plots were taken from a single winding of a bipolar stepper motor.
TABLE 2-2:
MODE 1 VALUES
Full Step
CH1: Phase 1
VREF = 1.94V
CH2: I01
Speed = 0.43V
CH3: I11
VLOAD = 24V
CH4: Coil Current
FIGURE 2-2:
DS50002058B-page 14
Mode 1 Plot.
2012-2013 Microchip Technology Inc.
Installation and Operation
TABLE 2-3:
MODE 2 VALUES
Half Step
CH1: Phase 1
VREF = 3.87V
CH2: I01
Speed = 0.43V
CH3: I11
VLOAD = 24V
CH4: Coil Current
FIGURE 2-3:
TABLE 2-4:
Mode 2 Plot.
MODE 3 VALUES
Modified Half Step
CH1: Phase 1
VREF = 3.87V
CH2: I01
Speed = 0.43V
CH3: I11
VLOAD = 24V
CH4: Coil Current
2012-2013 Microchip Technology Inc.
DS50002058B-page 15
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
FIGURE 2-4:
TABLE 2-5:
Mode 3 Plot.
MODE 4 VALUES
Micro Step
CH1: Phase 1
VREF = 3.87V
CH2: I01
Speed = 0.43V
CH3: I11
VLOAD = 24V
CH4: Coil Current
FIGURE 2-5:
DS50002058B-page 16
Mode 4 Plot.
2012-2013 Microchip Technology Inc.
MTS2916A DUAL FULL-BRIDGE
STEPPER MOTOR DRIVER
EVALUATION BOARD USER’S GUIDE
Appendix A. Schematic and Layouts
A.1
INTRODUCTION
This appendix contains the following schematics and layouts for the MTS2916A Dual
Full-Bridge Stepper Motor Driver Evaluation Board:
•
•
•
•
Board – Schematic
Board – Top Silk
Board – Top Pads and Silk
Board – Bottom Copper
2012-2013 Microchip Technology Inc.
DS50002058B-page 17
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
PIC16F883_SSOP28
BOARD – SCHEMATIC
PICkit™ Serial Analyzer Interface
PIC16F883
A.2
DS50002058B-page 18
2012-2013 Microchip Technology Inc.
Schematic and Layouts
A.3
BOARD – TOP SILK
2012-2013 Microchip Technology Inc.
DS50002058B-page 19
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
A.4
BOARD – TOP PADS AND SILK
DS50002058B-page 20
2012-2013 Microchip Technology Inc.
Schematic and Layouts
A.5
BOARD – BOTTOM COPPER
2012-2013 Microchip Technology Inc.
DS50002058B-page 21
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
NOTES:
DS50002058B-page 22
2012-2013 Microchip Technology Inc.
MTS2916A DUAL FULL-BRIDGE
STEPPER MOTOR DRIVER
EVALUATION BOARD USER’S GUIDE
Appendix B. Bill of Materials
TABLE B-1:
Qty.
BILL OF MATERIALS
Reference
Description_
Manufacturer
Part Number
2
C1, C2
Cap. 0.22 µF 10V Ceramic X7R 0603 10%
Yageo Corporation
CC0603KRX7R6BB224
1
C3
Cap. 1.0 µF 50V Ceramic X7R 10% 1206
TDK Corporation
C3216X7R1H105K
6
C4, C11,
C17, C18,
C19, C20
Cap. 1.0 µF 10V Ceramic X7R 0805 10%
Murata Manufacturing Co., Ltd.
GRM21BR71A105KA01L
1
C5
Cap. 0.01 µF 50V Ceramic X7R 0603 10%
Murata Manufacturing Co., Ltd.
GRM188R71H103KA01D
4
C6, C7, C8,
C21
Cap. 0.1 µF 25V Ceramic X7R 0603 10%
Murata Manufacturing Co., Ltd.
GRM188R71E104KA01D
1
C13
Cap. 100 µF 50V Elect. EB Radial
Panasonic® – ECG
EEU-EB1H101S
4
C9, C10,
C14, C15
Cap. 0.001 µF 50V Ceramic X7R 0603 10%
Murata Manufacturing Co., Ltd.
GRM188R71H102KA01D
1
C16
Cap. 0.1 µF 50V Ceramic X7R 0805 10%
Murata Manufacturing Co., Ltd.
GRM21BR71H104KA01L
1
D1
Diode Rectifier, Standard Recovery 1A 50V
DO-214AC SMA
Vishay/General
Semiconductor
S1A-E3
1
D2
Diode Rectifier, Standard Recovery 3A 200V Vishay/General
DO-214AB SMC
Semiconductor
S3D-E3/57T
4
D3, D4, D5,
D6
LED Chipled 570 nm Green 0805 SMD
OSRAM Opto
Semiconductors
GmbH.
LG R971-KN-1-0-20-R18
1
J1
Connector Pwr. Jack 2.5 X 6.5 mm W/O SW
CUI Inc.
PJ-037B
1
J2
Connector Term. Block 2.54 mm 5 Pos.
Phoenix Contact
GmbH & Co.
1725685
1
J3
Connector Header 6 Pos. 0.100 Vert. Tin
Breakaway
Molex®
—
1
J4
Connector Term. Block 2.54 mm 2 Pos.
Phoenix Contact
GmbH & Co.
1725656
1
J5
Connector Header 5 Pos. 0.100 Vert. Tin
Breakaway
Molex
—
1
JP1
Wire Jumper 22 Gauge
—
—
1
JP2
Connector Header 36 Pos. 0.100 Vert. Tin
(36 cuts in pairs of 2 = 18 per part number)
Molex
22-28-4360
1
PCB
MTS2916A Dual Full-Bridge Stepper Motor
Microchip
Driver Evaluation Board Printed Circuit Board Technology Inc.
104-00308
2
R1, R5
Res.1K Ohm 1/10W 1% 0603 SMD
Stackpole
Electronics, Inc.
RMCF0603FT1K00
2
R2, R3
Res. 22.6K Ohm 1/10W 1% 0603 SMD
Stackpole
Electronics, Inc.
RMCF0603FT22K6
1
R4
Pot. 10K Ohm 1/8W Carb. Vertical
CTS® Corporation
296UD103B1N
Note 1:
The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM
used in manufacturing uses all RoHS-compliant components.
2012-2013 Microchip Technology Inc.
DS50002058B-page 23
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
TABLE B-1:
BILL OF MATERIALS (CONTINUED)
Qty.
Reference
Description_
Manufacturer
Part Number
4
R6, R7, R8,
R9
Res. 11.3K Ohm 1/10W 1% 0603 SMD
Stackpole
Electronics, Inc.
RMCF0603FT11K3
1
R10
Res. 10K Ohm 1/10W 1% 0603 SMD
Stackpole
Electronics, Inc.
RMCF0603FT10K0
2
R11, R12
Res. 22K Ohm 1/10W 1% 0603 SMD
Stackpole
Electronics, Inc.
RMCF0603FT22K0
2
R13, R14
Res. 2K Ohm 1/10W 1% 0603 SMD
Stackpole
Electronics, Inc.
RMCF0603FT2K00
2
R15, R16
Res. 1.00 Ohm 3/4W 1% 2010 SMD
Vishay/Dale
CRCW20101R00FKEF
4
R17, R18,
R19, R20
Res. 49.9K Ohm 1/10W 1% 0603 SMD
Stackpole
Electronics, Inc.
RMCF0603FT49K9
4
R21, R22,
R23, R24
Res. 499 Ohm 1/10W 1% 0603 SMD
Stackpole
Electronics, Inc.
RMCF0603FT499
4
R25, R30,
R32, R36
Res. 0.0 Ohm 1/10W 5% 0603 SMD
Yageo Corporation
RC0603JR-070RL
1
R37
Res. 33K Ohm 1/10W 1% 0603 SMD
Stackpole
Electronics, Inc.
RMCF0603FT33K0
4
S1, S2, S3,
S4
Switch Tactile SPST-NO 6 mm 260 GF 0.05A E-Switch®, Inc.
12V SMT
14
TP1, TP2,
Test Point PC Compact SMT
TP3, TP4,
TP5, TP6,
TP7, TP11,
TP12, TP13,
TP14, TP18,
TP19, TP20
Keystone Electronics 5016
Corp.
1
U1
Microchip 5V 250 mA LDO SOT-23A
Microchip
Technology Inc.
MCP1703T-5002E/CB
1
U3
MCP6024 General Purpose Op Amp
14-TSSOP
Microchip
Technology Inc.
MCP6024-E/ST
1
U5
MTS2916A IC PWM Stepper Motor Driver
24-SOP
Microchip
Technology Inc.
MTS2916A-HGC1
1
U4
PIC16F883 MCU Flash 4K X 14 28-SSOP
Microchip
Technology Inc.
PIC16F883-E/SS
Note 1:
TL3301NF260QG
The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM
used in manufacturing uses all RoHS-compliant components.
DS50002058B-page 24
2012-2013 Microchip Technology Inc.
MTS2916A DUAL FULL-BRIDGE
STEPPER MOTOR DRIVER
EVALUATION BOARD USER’S GUIDE
Appendix C. Mode Sequence Diagrams
C.1
MTS2916A DUAL FULL-BRIDGE STEPPER MOTOR DRIVER EVALUATION
BOARD FUNCTIONAL FLOWCHART
POWER-UP
Speed Adjust
Press Mode Switch
Once
Mode 1:
Full-Step
Armed
Three times
Press Run Switch
Once
Press Run Switch
Once
Mode 1:
Full-Step VREF = 1V
Output
Twice
Mode 1:
Full-Step VREF = 2V
Output
Twice
Three times
Mode 1:
Full-Step VREF = 3V
Output
Three times
Four times
Five times
Twice
Mode 3:
Modified Half-Step
Armed
Mode 1:
Full-Step
Output
VREF = 4V
Four times
Mode 1:
Full-Step
Output
VREF = 5V
Five times
Mode 2:
Half-Step
Armed
Four times
Press Run Switch
Once
Twice
Three times
Four times
Five times
Press Run Switch
Once
Mode 2:
Half-Step VREF = 2V
Output
Twice
Three times
VREF = 3V
Mode 2:
Half-Step VREF = 4V
Output
Mode 2:
Half-Step VREF = 5V
Output
Four times
Five times
Five times
Six times
2012-2013 Microchip Technology Inc.
Mode 3:
Modified Half-Step
Output
VREF = 2V
Mode 3:
Modified Half-Step
Output
VREF = 3V
Mode 3:
Modified Half-Step
Output
VREF = 4V
Mode 3:
Modified Half-Step
Output
VREF = 5V
Mode 4:
Microstep
Armed
Mode 2:
Half-Step VREF = 1V
Output
Mode 2:
Half-Step
Output
Mode 3:
Modified Half-Step
Output
VREF = 1V
OFF
Mode 4:
Microstep
Output
VREF = 1V
Mode 4:
Microstep
Output
VREF = 2V
Mode 4:
Microstep
Output
VREF = 3V
Mode 4:
Microstep
Output
VREF = 4V
Mode 4:
Microstep
Output
VREF = 5V
Wraps to Mode 1
DS50002058B-page 25
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
C.2
SINGLE STEPPING EXAMPLE
POWER-UP
Speed Adjust
Press Mode Switch
Once
Mode 1:
Full-Step
Armed
Press
Run Switch
Once
Mode 1:
Full-Step
Output
Press
Hold Switch
Once
Hold Mode
Press
Run Switch
Single Stepping example shown for Mode 1.
Single Stepping is available in all four
modes.
DS50002058B-page 26
Single-Step
Mode
Every press of the Run
switch in Hold mode
produces one step
2012-2013 Microchip Technology Inc.
Mode Sequence Diagrams
C.3
C.3.1
MTS2916A DUAL FULL-BRIDGE STEPPER MOTOR DRIVER EVALUATION
BOARD SOFTWARE FLOWCHARTS
Main() Mode
ENTRY
Initialization
ReadAD= 1
?
Y
SampleADC()
SpeedUpdate()
ReadADC = 0
N
Second = 1
?
Y
DoOneSecondTasks()
Second = 0
N
1/8 Second = 1
?
Y
ScanSwitches()
EigthSecond = 0
N
2012-2013 Microchip Technology Inc.
DS50002058B-page 27
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
C.3.2
Interrupt() Mode
ENTRY
Timer 0?
Y
8HZ?
N
Y
EighthSecond=1
ReadADC = 1
N
1HZ?
Y
Second = 1
N
Timer 1?
Y
N
Stop?
N
Update Stepper
Driver Port B
Y
Hold?
N
Y
StepMode?
N
Y
DirectionBit?
N
Decrement
Rotation State
A
FIGURE C-1:
DS50002058B-page 28
B
Y
Increment Rotation
State
C
Interrupt() Mode.
2012-2013 Microchip Technology Inc.
Mode Sequence Diagrams
A
B
C
RunMode?
DirectionBit?
Y
N
Decrement
Rotation State
OFF
FULL
Increment Rotation
State
RotationData = STOP
RotationData = FullStepRotationTable(RotationState)
Switch (Stepmode)
HALF
F
FIGURE C-2:
RotationData = HalfStepRotationTable(RotationState)
D
Interrupt Mode (Continuation).
2012-2013 Microchip Technology Inc.
DS50002058B-page 29
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
F
D
MOD HALF
12 STEP
WAVE
RotationData = ModHalfStepRotationTable(RotationState)
RotationData = TwelveStepRotationTable(RotationState)
RotationData = WaveStepRotationTable(RotationState)
Phase1 =
Phase2?
Phase1 Decreasing
Phase2 Increasing
Phase1 Increasing
Phase2 Decreasing
CurrentReferencePWM1 = WaveStepCurrentRefTable(Phase1)
CurrentReferencePWM2 = WaveStepCurrentRefTable(Phase2)
DEFAULT
G
FIGURE C-3:
DS50002058B-page 30
RotationData = STOP
StepMode = OFF
E
Interrupt Mode (Continuation).
2012-2013 Microchip Technology Inc.
Mode Sequence Diagrams
G
E
Update Current Reference PWM1
and PWM2 for next interrupt
End ISR
FIGURE C-4:
Interrupt Mode (Last).
2012-2013 Microchip Technology Inc.
DS50002058B-page 31
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
C.3.3
SampleADC() Mode
ENTRY
Read Selected
A/D Channel
Averaging
Complete?
Y
Compute Average.
Reload Average Counter.
N
Save average into A/D
Channel location.
Select next channel.
Return
DS50002058B-page 32
2012-2013 Microchip Technology Inc.
Mode Sequence Diagrams
C.3.4
ReadADCChannel (Channel) Mode
ENTRY
Set A/D MUX
Channel
Delay for A/D MUX
Select
Start Conversion
Conversion
Complete?
N
Y
Return Result
2012-2013 Microchip Technology Inc.
DS50002058B-page 33
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
C.3.5
SpeedUpdate() Mode
ENTRY
SpeedInput
< 65?
Speed = 0
Fault = Speed Low
SpeedInput
< 100?
Speed = 0
Fault = No Fault
SpeedInput
> 950?
Speed = 0
Fault = Speed High
SpeedInput
> 900?
Speed = Max
Fault = No Fault
Calculate Speed
Fault = No Fault
Calculate Rollover
Count
Store new timer
reload value
Return (Fault)
DS50002058B-page 34
2012-2013 Microchip Technology Inc.
Mode Sequence Diagrams
C.3.6
DoOneSecondTasks() Mode
ENTRY
Mode Switch
Pressed?
N
Status LED = Fault
Y
Return
2012-2013 Microchip Technology Inc.
DS50002058B-page 35
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
C.3.7
ScanSwitches() Mode
ENTRY
Direction Sw
Pressed?
Y
Toggle Direction Bit
Stop = 0
N
Direction Sw
Pressed?
Y
DoOneSecondTasks()
N
Hold Sw
Pressed?
Y
Toggle Hold Bit
StepMode = Hold Bit
Hold Bit Set?
N
StepMode = 0
Y
N
Hold Sw
Pressed?
Y
DoOneSecondTasks()
N
Y
Mode Sw
Pressed
Stop.
Turn Off PWMs.
Increment StepMode.
N
OFF
RotationData = Stop
Switch(StepMode)
H
FIGURE C-5:
DS50002058B-page 36
I
ScanSwitches() Mode.
2012-2013 Microchip Technology Inc.
Mode Sequence Diagrams
H
I
FULL
HALF
MOD HALF
RotationData = FullStepRotationTable(0)
RotationData = HalfStepRotationTable(0)
RotationData = ModHalfStepRotationTable(0)
Switch (StepMode)
12 STEP
WAVE
DEFAULT
J
FIGURE C-6:
RotationData = TwelveStepRotationTable(0)
RotationData = WaveStepRotationTable(0)
RotationData = STOP
StepMode = OFF
K
ScanSwitches() Mode (Continuation).
2012-2013 Microchip Technology Inc.
DS50002058B-page 37
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
J
K
Display StepMode on LEDs
Mode Sw
Pressed?
Y
DoOneSecondTasks()
N
Update LEDs
Return
FIGURE C-7:
DS50002058B-page 38
ScanSwitches() Mode (Continuation).
2012-2013 Microchip Technology Inc.
Mode Sequence Diagrams
NOTES:
2012-2013 Microchip Technology Inc.
DS50002058B-page 39
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Toronto
Mississauga, Ontario,
Canada
Tel: 905-673-0699
Fax: 905-673-6509
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
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Fax: 86-10-8528-2104
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Fax: 82-2-558-5932 or
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Tel: 852-2943-5100
Fax: 852-2401-3431
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
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Tel: 886-3-5778-366
Fax: 886-3-5770-955
China - Shenzhen
Tel: 86-755-8864-2200
Fax: 86-755-8203-1760
Taiwan - Kaohsiung
Tel: 886-7-213-7828
Fax: 886-7-330-9305
China - Wuhan
Tel: 86-27-5980-5300
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Taiwan - Taipei
Tel: 886-2-2508-8600
Fax: 886-2-2508-0102
China - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
UK - Wokingham
Tel: 44-118-921-5869
Fax: 44-118-921-5820
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Tel: 86-592-2388138
Fax: 86-592-2388130
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Tel: 86-756-3210040
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DS50002058B-page 40
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Japan - Tokyo
Tel: 81-3-6880- 3770
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11/29/12
2012-2013 Microchip Technology Inc.