Microchip MTS2916A Dual Full-Bridge Stepper Motor Driver Stepper Motor Driver User’s Guide
Below you will find brief information for MTS2916A Dual Full-Bridge Stepper Motor Driver. 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.
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MTS2916A
Dual Full-Bridge Stepper
Motor Driver
Evaluation Board
User’s Guide
2012-2013 Microchip Technology Inc.
DS50002058B
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DS50002058B-page 2
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OQ
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2012-2013 Microchip Technology Inc.
MTS2916A DUAL FULL-BRIDGE
STEPPER MOTOR DRIVER
EVALUATION BOARD USER’S GUIDE
Table of Contents
Preface ........................................................................................................................... 5
Document Revision History ................................................................................... 7
Chapter 1. Product Overview
1.3 What is the MTS2916A Dual Full-Bridge Stepper Motor Driver
1.4 MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board
Chapter 2. Installation and Operation
Appendix A. Schematic and Layouts
Appendix B. Bill of Materials
Appendix C. Mode Sequence Diagrams
C.1 MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board
C.3 MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board
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 Represents
Arial font:
Italic characters
Initial caps
Quotes
Referenced books
Emphasized text
A window
A dialog
A menu selection
A field name in a window or dialog
A menu path Underlined, italic text with right angle bracket
Bold characters
N‘Rnnnn
File>Save
Examples
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
Press <Enter>, <F1> Text in angle brackets < >
Courier New font:
Plain Courier New
MPLAB
®
IDE User’s Guide
...is the only compiler...
the Output window the Settings dialog select Enable Programmer
“Save project before build”
Italic Courier New
Square brackets [ ]
Curly brackets and pipe character: { | }
Ellipses...
Sample source code
Filenames
File paths
Keywords
Command-line options
Bit values
Constants
A variable argument
Optional arguments
#define START autoexec.bat
c:\mcc18\h
_asm, _endasm, static
-Opa+, -Opa-
0, 1
0xFF, ‘A’
file.o
, where file can be any valid filename mcc18 [options] file
[options] errorlevel {0|1} Choice of mutually exclusive arguments; an OR selection
Replaces repeated text
Represents code supplied by user var_name [, var_name...] void main (void)
{ ...
}
DS50002058B-page 6
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:
• 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
PHASE1
I01
I11
V
REF1
V
LOGIC
Logic
Current
Sense
Comparator
One-shot
Undervoltage
Lockout
Shift Drivers
Thermal
Shutdown
Power
Bridge
V
LOAD
OUT1A
C C
10V to 30V
V
LOAD
OUT1B
PHASE2
I02
I12
V
REF2
Logic
Current
Sense
Comparator
One-shot
Shift Drivers
Power
Bridge
OUT2A
OUT2B
M
COMPIN1 COMPIN2
Rt
RC2 RC1
Ct
Rt
GND
Ct
Rc
Cc
Cc
Rc
SENSE1
Rs Rs
SENSE2
FIGURE 1-1: Typical MTS2916A Stepper Motor Driver Application.
1.3
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 V
LOAD
input. V
LOAD
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 V
DC
to 12 V
DC
) with jumper JP2 installed. For higher motor voltages, make sure JP2 is not installed, and connect V
LOAD
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) V
LOAD
(Motor Supply Power):
- J4-1(PGND), J4-2(V
LOAD
)
- TP20(PGND), TP18(V
LOAD
)
WARNING
Do not connect more than 16V to these motor supply connections while Jumper JP2 is installed.
c) V
LOGIC
:
- 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: Power Connection Diagram.
2.3
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 R s
, V
I0/I1 logic inputs
REF
and conditioning of
• 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 V DC to 12 V DC ). 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) V
REF
. Subsequent Run presses increase V
REF approximately 1V up to 5V maximum. This increases the current regulation
by 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
0
1
0
1
CURRENT LEVEL CONTROL
I1 Comparator Trip Voltage
1
1
0
0
V
TRIP
= 1/10 x V
REF
V
TRIP
= 1/15 x V
REF
V
TRIP
= 1/30 x V
REF x
Output Current
I
MAX
= V
REF
/10 x R
S
2/3 x I
MAX
= V
REF
/15 x R
S
1/3 x I
MAX
= V
REF
/30 x R
S
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 (t
OFF
) is set by the combination of R t
and C t and is determined by the expression: t
OFF
= 1.1 x R t x C t
.
The evaluation board is designed with t
OFF
= 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, V
REF
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 t
OFF
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
CH2: I01
CH3: I11
CH4: Coil Current
V
REF
= 1.94V
Speed = 0.43V
V
LOAD
= 24V
DS50002058B-page 14
FIGURE 2-2: Mode 1 Plot.
2012-2013 Microchip Technology Inc.
Installation and Operation
TABLE 2-3: MODE 2 VALUES
Half Step
CH1: Phase 1
CH2: I01
CH3: I11
CH4: Coil Current
V
REF
= 3.87V
Speed = 0.43V
V
LOAD
= 24V
FIGURE 2-3: Mode 2 Plot.
TABLE 2-4: MODE 3 VALUES
Modified Half Step
CH1: Phase 1
CH2: I01
CH3: I11
CH4: Coil Current
V
REF
= 3.87V
Speed = 0.43V
V
LOAD
= 24V
2012-2013 Microchip Technology Inc.
DS50002058B-page 15
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
FIGURE 2-4: Mode 3 Plot.
TABLE 2-5: MODE 4 VALUES
Micro Step
CH1: Phase 1
CH2: I01
CH3: I11
CH4: Coil Current
V
REF
= 3.87V
Speed = 0.43V
V
LOAD
= 24V
DS50002058B-page 16
FIGURE 2-5: 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:
2012-2013 Microchip Technology Inc.
DS50002058B-page 17
MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board User’s Guide
A.2
BOARD – SCHEMATIC
DS50002058B-page 18
2012-2013 Microchip Technology Inc.
A.3
BOARD – TOP SILK
Schematic and Layouts
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.
A.5
BOARD – BOTTOM COPPER
Schematic and Layouts
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.
Reference
BILL OF MATERIALS
Description_ Manufacturer Part Number
2 C1, C2
1 C3
6 C4, C11,
C17, C18,
C19, C20
1 C5
Cap. 0.22 µF 10V Ceramic X7R 0603 10%
Cap. 1.0 µF 50V Ceramic X7R 10% 1206
Cap. 1.0 µF 10V Ceramic X7R 0805 10%
Yageo Corporation
TDK Corporation
Murata Manufacturing Co., Ltd.
CC0603KRX7R6BB224
C3216X7R1H105K
GRM21BR71A105KA01L
4
1
1
1
1
4
1
1
1
1
1
1
1
C6, C7, C8,
C21
C13
4 C9, C10,
C14, C15
C16
D1
D2
D3, D4, D5,
D6
J1
J2
J3
J4
J5
JP1
JP2
Cap. 0.01 µF 50V Ceramic X7R 0603 10% Murata Manufacturing Co., Ltd.
Cap. 0.1 µF 25V Ceramic X7R 0603 10%
Cap. 100 µF 50V Elect. EB Radial
GRM188R71H103KA01D
Murata Manufacturing Co., Ltd.
GRM188R71E104KA01D
Panasonic
®
– ECG EEU-EB1H101S
GRM188R71H102KA01D Cap. 0.001 µF 50V Ceramic X7R 0603 10% Murata Manufacturing Co., Ltd.
Cap. 0.1 µF 50V Ceramic X7R 0805 10% Murata Manufacturing Co., Ltd.
GRM21BR71H104KA01L
Diode Rectifier, Standard Recovery 1A 50V
DO-214AC SMA
Diode Rectifier, Standard Recovery 3A 200V
DO-214AB SMC
LED Chipled 570 nm Green 0805 SMD
Connector Header 36 Pos. 0.100 Vert. Tin
(36 cuts in pairs of 2 = 18 per part number)
Vishay/General
Semiconductor
Connector Pwr. Jack 2.5 X 6.5 mm W/O SW CUI Inc.
Connector Term. Block 2.54 mm 5 Pos.
Connector Header 6 Pos. 0.100 Vert. Tin
Breakaway
Phoenix Contact
GmbH & Co.
Molex
®
Connector Term. Block 2.54 mm 2 Pos.
OSRAM Opto
Semiconductors
GmbH.
Connector Header 5 Pos. 0.100 Vert. Tin
Breakaway
Wire Jumper 22 Gauge
Vishay/General
Semiconductor
Phoenix Contact
GmbH & Co.
Molex
—
Molex
S1A-E3
S3D-E3/57T
LG R971-KN-1-0-20-R18
PJ-037B
1725685
—
1725656
—
—
22-28-4360
1
2
PCB
R1, R5
MTS2916A Dual Full-Bridge Stepper Motor
Driver Evaluation Board Printed Circuit Board
Res.1K Ohm 1/10W 1% 0603 SMD
Microchip
Technology Inc.
Stackpole
Electronics, Inc.
104-00308
RMCF0603FT1K00
2 R2, R3 Res. 22.6K Ohm 1/10W 1% 0603 SMD Stackpole
Electronics, Inc.
CTS
®
Corporation
RMCF0603FT22K6
1 R4 Pot. 10K Ohm 1/8W Carb. Vertical 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:
Qty.
Reference
BILL OF MATERIALS (CONTINUED)
Description_ Manufacturer Part Number
4
1
2
R6, R7, R8,
R9
R10
R11, R12
Res. 11.3K Ohm 1/10W 1% 0603 SMD
Res. 10K Ohm 1/10W 1% 0603 SMD
Res. 22K Ohm 1/10W 1% 0603 SMD
Stackpole
Electronics, Inc.
Stackpole
Electronics, Inc.
Stackpole
Electronics, Inc.
RMCF0603FT11K3
RMCF0603FT10K0
RMCF0603FT22K0
2
2 R15, R16
4 R17, R18,
R19, R20
4
R13, R14
R21, R22,
R23, R24
Res. 2K Ohm 1/10W 1% 0603 SMD
Res. 1.00 Ohm 3/4W 1% 2010 SMD
Res. 49.9K Ohm 1/10W 1% 0603 SMD
Res. 499 Ohm 1/10W 1% 0603 SMD
Stackpole
Electronics, Inc.
Vishay/Dale
Stackpole
Electronics, Inc.
RMCF0603FT2K00
CRCW20101R00FKEF
RMCF0603FT49K9
Stackpole
Electronics, Inc.
RMCF0603FT499
Yageo Corporation RC0603JR-070RL 4 R25, R30,
R32, R36
1 R37
Res. 0.0 Ohm 1/10W 5% 0603 SMD
4 S1, S2, S3,
S4
14 TP1, TP2,
TP3, TP4,
TP5, TP6,
TP7, TP11,
TP12, TP13,
TP14, TP18,
TP19, TP20
1 U1
Res. 33K Ohm 1/10W 1% 0603 SMD
Switch Tactile SPST-NO 6 mm 260 GF 0.05A
12V SMT
Test Point PC Compact SMT
Stackpole
Electronics, Inc.
E-Switch
®
, Inc.
RMCF0603FT33K0
TL3301NF260QG
Keystone Electronics
Corp.
5016
1
1
1
U3
U5
U4
Microchip 5V 250 mA LDO SOT-23A
MCP6024 General Purpose Op Amp
14-TSSOP
MTS2916A IC PWM Stepper Motor Driver
24-SOP
PIC16F883 MCU Flash 4K X 14 28-SSOP
Microchip
Technology Inc.
Microchip
Technology Inc.
Microchip
Technology Inc.
Microchip
Technology Inc.
MCP1703T-5002E/CB
MCP6024-E/ST
MTS2916A-HGC1
PIC16F883-E/SS
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.
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
Press Mode Switch
Once
Speed Adjust
Twice
Mode 1:
Full-Step
Armed
Press Run Switch
Once
Twice
Three times
Four times
Five times
Mode 1:
Full-Step
Output
V
REF
= 1V
Mode 1:
Full-Step
Output
V
REF
= 2V
Mode 1:
Full-Step
Output
V
REF
= 3V
Mode 1:
Full-Step
Output
V
REF
= 4V
Mode 1:
Full-Step
Output
V
REF
= 5V
Mode 2:
Half-Step
Armed
Press Run Switch
Once
Twice
Three times
Four times
Five times
Mode 2:
Half-Step
Output
V
REF
= 1V
Mode 2:
Half-Step
Output
V
REF
= 2V
Mode 2:
Half-Step
Output
V
REF
= 3V
Mode 2:
Half-Step
Output
V
REF
= 4V
Mode 2:
Half-Step
Output
V
REF
= 5V
Three times
Mode 3:
Modified Half-Step
Armed
Press Run Switch
Once
Twice
Three times
Four times
Five times
Mode 3:
Modified Half-Step
V
Output
REF
= 1V
Mode 3:
Modified Half-Step
V
Output
REF
= 2V
Mode 3:
Modified Half-Step
Output
V
REF
= 3V
Mode 3:
Modified Half-Step
V
Output
REF
= 4V
Mode 3:
Modified Half-Step
V
Output
REF
= 5V
Four times
Mode 4:
Microstep
Armed
Press Run Switch
Once
Five times
Six times
Four times
OFF
Wraps to Mode 1
Twice
Three times
Five times
Mode 4:
Microstep
Output
V
REF
= 1V
Mode 4:
Microstep
Output
V
REF
= 2V
Mode 4:
Microstep
Output
V
REF
= 3V
Mode 4:
Microstep
Output
V
REF
= 4V
Mode 4:
Microstep
Output
V
REF
= 5V
2012-2013 Microchip Technology Inc.
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
Single Stepping example shown for Mode 1.
Single Stepping is available in all four modes.
Mode 1:
Full-Step
Output
Press
Hold Switch
Once
Hold Mode
Press
Run Switch
Single-Step
Mode
Every press of the Run switch in Hold mode produces one step
DS50002058B-page 26
2012-2013 Microchip Technology Inc.
Mode Sequence Diagrams
C.3
MTS2916A DUAL FULL-BRIDGE STEPPER MOTOR DRIVER EVALUATION
BOARD SOFTWARE FLOWCHARTS
C.3.1
Main() Mode
ENTRY
Initialization
ReadAD= 1
?
Y
N
SampleADC() SpeedUpdate()
Second = 1
?
Y
N
DoOneSecondTasks()
1/8 Second = 1
?
Y
N
ScanSwitches()
ReadADC = 0
Second = 0
EigthSecond = 0
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
N
8HZ?
N
Y EighthSecond=1
ReadADC = 1
1HZ?
N
Y
Second = 1
Timer 1?
Y
N
Stop?
N
Y
Update Stepper
Driver Port B
Hold?
Y
N
StepMode?
Y
N
DirectionBit?
Y
N
Decrement
Rotation State
Increment Rotation
State
A
FIGURE C-1: Interrupt() Mode.
B
DS50002058B-page 28
C
2012-2013 Microchip Technology Inc.
A
Mode Sequence Diagrams
C B
RunMode?
DirectionBit?
Y
N
Decrement
Rotation State
Increment Rotation
State
OFF
RotationData = STOP
FULL
Switch (Stepmode)
HALF
RotationData = FullStepRotationTable(RotationState)
RotationData = HalfStepRotationTable(RotationState)
F D
FIGURE C-2: 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
RotationData = ModHalfStepRotationTable(RotationState)
12 STEP
RotationData = TwelveStepRotationTable(RotationState)
WAVE
RotationData = WaveStepRotationTable(RotationState)
Phase1 =
Phase2?
Phase1 Decreasing
Phase2 Increasing
Phase1 Increasing
Phase2 Decreasing
DEFAULT
CurrentReferencePWM1 = WaveStepCurrentRefTable(Phase1)
CurrentReferencePWM2 = WaveStepCurrentRefTable(Phase2)
RotationData = STOP
StepMode = OFF
G E
FIGURE C-3:
DS50002058B-page 30
Interrupt Mode (Continuation).
2012-2013 Microchip Technology Inc.
G
Mode Sequence Diagrams
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
N
Compute Average.
Reload Average Counter.
Save average into A/D
Channel location.
Select next channel.
DS50002058B-page 32
Return
2012-2013 Microchip Technology Inc.
C.3.4
ReadADCChannel (Channel) Mode
Mode Sequence Diagrams
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.
C.3.6
DoOneSecondTasks() Mode
ENTRY
Mode Sequence Diagrams
Mode Switch
Pressed?
N
Y
Status LED = Fault
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
N
DoOneSecondTasks()
Hold Sw
Pressed?
Y
Toggle Hold Bit
StepMode = Hold Bit
Hold Bit Set?
N
Y
StepMode = 0
N
Hold Sw
Pressed?
Y
N
DoOneSecondTasks()
Mode Sw
Pressed
Y
Stop.
Turn Off PWMs.
Increment StepMode.
N
Switch(StepMode)
OFF
RotationData = Stop
H I
FIGURE C-5:
DS50002058B-page 36
ScanSwitches() Mode.
2012-2013 Microchip Technology Inc.
Mode Sequence Diagrams
H I
FULL
RotationData = FullStepRotationTable(0)
HALF
RotationData = HalfStepRotationTable(0)
MOD HALF
RotationData = ModHalfStepRotationTable(0)
Switch (StepMode)
12 STEP
RotationData = TwelveStepRotationTable(0)
WAVE
RotationData = WaveStepRotationTable(0)
DEFAULT
RotationData = STOP
StepMode = OFF
FIGURE C-6:
J 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
N
DoOneSecondTasks()
Update LEDs
FIGURE C-7:
Return
ScanSwitches() Mode (Continuation).
DS50002058B-page 38
2012-2013 Microchip Technology Inc.
NOTES:
Mode Sequence Diagrams
2012-2013 Microchip Technology Inc.
DS50002058B-page 39
AMERICAS
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DS50002058B-page 40
Worldwide Sales and Service
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Fax: 44-118-921-5820
11/29/12
2012-2013 Microchip Technology Inc.
advertisement
Key Features
- Drives both windings of a bipolar stepper motor
- Capable of sustaining 40V and delivering 750 mA of continuous current
- Full, half and microstepping operations
- PWM current control
- Internal clamp diodes protect against inductive voltage transients
- Thermal protection circuitry disables the outputs when the junction temperature exceeds the thermal protection threshold
- Undervoltage lockout circuitry prevents the outputs from going active until the logic supply voltage is high enough to assume control
- PICkit™ Programming connector
