UM3317
User manual
Stepper motor driver evaluation board based on the L6472
Introduction
The EVL6472 is a stepper motor driver evaluation board based on the L6472.
It provides an affordable and easy-to-use solution to drive a stepper motor in your application.
The L6472 device, created using analog mixed signal technology, is an advanced fully integrated solution suitable for driving
two-phase bipolar stepper motors with microstepping. It integrates a dual low RdsON DMOS full bridge with an accurate on-chip
current sensing circuitry suitable for non dissipative current control and overcurrent protection. Thanks to a new current control,
a 1/16 microstepping is achieved through an adaptive decay mode which outperforms traditional implementations. The digital
control core can generate user-defined motion profiles with acceleration, deceleration, speed or target position, which are easily
programmed through a dedicated set of registers. All application commands and data registers, including those used to set
analog values (that is: current control value, current protection trip point, dead time, etc.) are sent through a standard 5-Mbit/s
SPI. A complete set of protections (thermal, low bus voltage and overcurrent) makes the L6472 device fully protected, as
required by the most demanding motor control applications.
The EVL6472 is compatible with the Arduino® UNO R3 connector and supports the addition of other boards which can be
stacked to drive up to three stepper motors.
Figure 1. EVL6472 board
UM3317 - Rev 1 - March 2024
For further information contact your local STMicroelectronics sales office.
www.st.com
UM3317
Getting started
1
Getting started
The EVL6472 evaluation board is a stepper motor driver covering a wide range of applications. The maximum
ratings are:
•
•
Power stage supply voltage (VS) from 8 V to 45 V
Motor phase current up to 3 Arms
Follow this procedure to start your evaluation:
1.
Check the setting of the jumpers based on your configuration as described in Section 2 Hardware
description and configuration
2.
Connect the board with the STM32 Nucleo board through Arduino UNO R3
3.
Supply the board through input 2 (VS) and 1 (ground) of the connector CN2
4.
The power OK (green) and fault (red) LEDs turn on
In order to use the EVL6472 in conjunction with the STSPIN Studio, please visit www.st.com.
Up to three evaluation boards can be stacked on the same STM32 Nucleo board, as described in
Section 2.2 Multi-motor configuration.
Further support material is available on the respective product pages on www.st.com.
UM3317 - Rev 1
page 2/13
UM3317
Hardware description andconfiguration
2
Hardware description and configuration
Figure 2. EVL6472 board overview
CN8
Arduino Uno R3 connector
CN6
Arduino Uno R3 connector
CN1
Motor phases connector
Power-up LED
External switch connector
2
CN2
Power connector
R16, R17, R18
Chip select SPI lines
Status flag LED
CN5
Arduino Uno R3 connector
Busy/Sync LED
CN9
Arduino Uno R3 connector
The following table provides the detailed pinout of the Arduino UNO R3.
Table 1. Arduino UNO R3 connector table
Pin(1)
Connector
CN5
CN9
CN8
CN6
Signal
Remarks
1
SPI chip select 1
See Section 2.2 Multi-motor configuration
2
SPI chip select 2
See Section 2.2 Multi-motor configuration
3
SPI chip select 3
See Section 2.2 Multi-motor configuration
4
SPI MOSI
5
SPI MISO
6
SPI SCK
7
Ground
4
STBY\RESET
6
STCK
5
FLAG
6
BUSY\SYNC
2
VDD
6
Ground
7
Ground
See Section 2.1 Selecting the chip select line of the SPI
See Section 2.2 Multi-motor configuration
Step-clock input
1. All non-listed pins are not connected.
2.1
Selecting the chip select line of the SPI
The chip select line of the SPI interface can be selected through dedicated resistors as indicated in Table 2: "Chip
select line selection".
UM3317 - Rev 1
page 3/13
UM3317
Multi-motor configuration
Table 2. Arduino UNO R3 connector table
2.2
R16
R17
R18
CS line
0R
Not mounted
Not mounted
CN5 pin 1 (default)
Not mounted
0R
Not mounted
CN5 pin 2
Not mounted
Not mounted
0R
CN5 pin 3
Multi-motor configuration
The evaluation boards can be stacked on a single STM32 Nucleo board to drive up to three stepper motors (one
for each motor).
By default, the stepper driver board is configured for a motor driven by chip select line 1 of the SPI, so the board
configuration for multi-motor setups must be changed in accordance with Table 2 before stacking the boards on
the STM32 Nucleo.
The stacked boards exploit the same step-clock signal and share the same fault and busy pins.
2.3
External switch connection
An external switch can be connected to J1 to stop the motor movement when the switch status changes. For
proper management of this additional feature of the L6472 device, refer to section “External switch (SW pin)” of
the related datasheet (see www.st.com).
UM3317 - Rev 1
page 4/13
UM3317
Safety precautions
3
Safety precautions
Warning:
Some of the components mounted on the board could reach hazardous temperature
during operation.
While using the board, the following precautions must be observed:
•
•
•
•
UM3317 - Rev 1
Do not touch the components or the heatsink.
Do not cover the board.
Do not put the board in contact with flammable materials or with materials releasing smoke when heated.
After operation, allow the board to cool down before touching it.
page 5/13
UM3317
Bill of material
4
Bill of material
Table 3. EVL6472 bill of material
Item Q.ty
UM3317 - Rev 1
Ref.
Part/Value
Description
Manufact.
Order code
1
1
CN1
Connector 5.08mm
Close vertical
CON-1x4
Wurth Elektronik
691312510004
or equivalent
2
1
CN2
Connector 5.08mm
Close vertical
CON-1x2
Wurth Elektronik
691312510002
or equivalent
3
1
CN5
Connector throughCON-1x10
hole-pitch2.54
Samtec
SSQ-110-04-F-S
or equivalent
4
2
CN6,CN9
Connector throughCON-1x8
hole-pitch2.54
Samtec
SSQ-108-04-F-S
or equivalent
5
2
CN7,CN10
Connector throughN.M.
hole-pitch2.54
6
1
CN8
Connector throughCON-1x6
hole-pitch2.54
Samtec
SSQ-106-04-F-S
or equivalent
7
1
C1
SMT aluminum
elect. capacitor
100uF/63V
Panasonic
EEEFK1J101P
or equivalent
8
4
C2,C3,C6,C9
SMT ceramic
capacitor
100nF/50V
9
1
C4
SMT ceramic
capacitor
220nF/35V
10
2
C5,C11
SMT ceramic
capacitor
10nF/50V
11
1
C7
Tantalum SMD
capacitor
10uF/16V
12
1
C8
Tantalum SMD
capacitor
47uF/16V
13
1
C10
SMT ceramic
capacitor
N.M.
14
5
D1,D2,D3,D4,D6
Yellow LED
YELLOW
15
1
D5
Red LED
RED
16
1
D7
Green LED
GREEN
17
1
D8
Double diode high
speed switching
diode
BAR43
18
1
D9
3.3V Zener diode
N.M.
19
1
J1
Strip connector 2
pos, 2.54mm
OPEN
20
3
R1,R3,R10
SMT resistor
330R
21
4
R2,R4,R5,R25
SMT resistor
39K
22
4
R6,R7,R8,R9
SMT resistor
10K-1/2W
23
8
R11,R12,R13,R14,R15,R16,R19,R20 SMT resistor
0R
24
5
R17,R18,R21,R22,R23
SMT resistor
N.M.
25
1
R24
SMT resistor
100R
26
5
TP1,TP2,TP3,TP4,TP5
SMT test point
-1.6mm
TESTPOINT Harwin
27
1
U2
Microstepping
motor controller
L6472PD
STMicroelectronics BAR43SFILM
BZX84J-B3V6 or
equivalent
Wurth Elektronik
61300211121 or
equivalent
S1751-46R or
equivalent
STMicroelectronics L6470PD
page 6/13
UM3317
Bill of material
Item Q.ty
UM3317 - Rev 1
Ref.
Part/Value
Description
Manufact.
Order code
28
1
Connector 5.08mm
horizontal with
hook on wire side
CON-1x4
Wurth Elektronik
691351500004
or equivalent
29
1
Connector 5.08mm
horizontal with
hook on wire side
CON-1x2
Wurth Elektronik
691351500002
or equivalent
page 7/13
UM3317
Schematic diagram
5
Schematic diagram
Figure 3. EVL6472 schematic diagram
CN7
VDD
CN6
R10
1
2
3
4
5
6
7
8
IOREF
3.3V
5V
GND
GND
VIN
2
330R
1
D7
GREEN C8
VS
C9
+
CON-1x8
S TRIP 254P -F-8
2
C4
220NF
47UF 100NF
2
CN8
3
VS
1
4
5
33
34
15
16
22
23
2
TP 1
TP 4
TP 2
18
17
2
20
21
D1
D2
D2
D3
D3
D4
D4
2
14
9
13
VS A
VS A
VS A
VS A
VS B
VS B
VS B
VS B
CP
VBOOT
VDD
28
A+
CN1
1
1
1
R7
10K
R8
10K
R9
10K
R16 0R
R17 NP
R18 NP
R19 0R
R20 0R
R14 0R
CS_1
CS_2
CS_3
SDI
SDO
CK
R6
10K
1
2
3
4
5
6
7
8
9
10
STCK_TIM3_CH1
STBY_RES
1
2
3
4
5
6
7
8
R11 0R
A-
1
CN5 CON-1x10
S TRIP 254P -F-10
37
35
33
31
29
27
25
23
21
19
17
15
13
11
9
7
5
3
1
CN9
CON-1x8
S TRIP 254P -F-8
OUT2B
OUT2B
B+
B-
2
35
36
YELLOW YELLOW YELLOW YELLOW
YELLOW
D6
1
BUSY
R25
39K
R15 0R
2
2
1
D5
Re d
R5
39K
R4
39K
OUT1B
OUT1B
P GND
R3
330R
SDI
SDO
GND
4
2
3
TP 3
CS
CK
Vin
1
3
U2
L6472P D
P GND
27
25
STCK
STBY_RES
FLAG
BUSY_SYNC
1
30
26
VDD
OUT2A
OUT2A
100UF
2
19
D9
NP
C10
NP
ADCIN
SW
AGND
C11
10NF
32
6
31
29
2
R22
NP
100R
+ C1
100NF
100NF
OUT1A
OUT1A
12
1
SW
R24
1
2
OSCIN
OSCOUT
EP AD
J1
8
7
VREG
24
R21
NP
10
11
C2
C3
DGND
VS
R2
39K
CN2
TP 5
2
10UF
2
R23
NP
8-45V
C5
10NF
+ C7
100NF
2
C6
1
FLAG
BUSY_SYNC
1
R12 0R
R13 0R
CON-1x6
R1
330R
1
VDD
A0
A1
A2
A3
1
2
3
4
5
6
CON-2x19
FLAG
D8
BAR43
37
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
1
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
CN10
CON-2x19
UM3317 - Rev 1
page 8/13
UM3317
Revision history
Table 4. Document revision history
UM3317 - Rev 1
Date
Version
18-Mar-2024
1
Changes
Initial release.
page 9/13
UM3317
Contents
Contents
1
Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2
Hardware description and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1
Selecting the chip select line of the SPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2
Multi-motor configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3
External switch connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Safety precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
5
Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
List of tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
List of figures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
UM3317 - Rev 1
page 10/13
UM3317
List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Arduino UNO R3 connector table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Arduino UNO R3 connector table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
EVL6472 bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
UM3317 - Rev 1
page 11/13
UM3317
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
UM3317 - Rev 1
EVL6472 board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
EVL6472 board overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
EVL6472 schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
page 12/13
UM3317
IMPORTANT NOTICE – READ CAREFULLY
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are the property of their respective owners.
Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2024 STMicroelectronics – All rights reserved
UM3317 - Rev 1
page 13/13
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