ST STLINK-V3MODS User manual

December 2021 UM2502 Rev 2 1/28
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UM2502
User manual
STLINK-V3MODS and STLINK-V3MINI debugger/programmer
tiny probes for STM32 microcontrollers
Introduction
STLINK-V3MODS and STLINK-V3MINI are stand-alone debugging and programming tiny
probes for STM32 microcontrollers. These products are designed in a very low form factor
and both offer high performance without any compromise to functions. They support the
JTAG/SWD interfaces for communication with any STM32 microcontroller located on an
application board.
They provide a Virtual COM port interface allowing the host PC to communicate with the
target microcontroller through one UART. The STLINK-V3MODS also provides bridge
interfaces to several communication protocols allowing for instance the programming of the
target through the bootloader.
The STLINK-V3MODS and STLINK-V3MINI are both proposed for different uses. The
STLINK-V3MODS may be directly soldered on a host PCB including an STM32 application-
based with its 2 x 16-pin castellated vias connection, while the STLINK-V3MINI offers
STDC14 connectivity with an included STDC14 to STDC14 flat cable.
Pictures are not contractual.
Figure 1. STLINK-V3MODS product top view Figure 2. STLINK-V3MINI product top view
www.st.com

Contents UM2502
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Contents
1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Development environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 Development toolchains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Quick start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 STLINK-V3MODS and STLINK-V3MINI functional description . . . . . . 10
5.1 STLINK-V3MODS and STLINK-V3MINI overview . . . . . . . . . . . . . . . . . . 10
5.2 STLINK-V3MODS and STLINK-V3MINI frequency selection . . . . . . . . . . 10
5.3 High-performance modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.4 Hardware layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.5 STLINK-V3MODS and STLINK-V3MINI functions . . . . . . . . . . . . . . . . . . 15
5.5.1 SWD with SWV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.5.2 JTAG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.5.3 Virtual COM port (VCP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.5.4 Mass storage interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.5.5 Bridge functions (STLINK-V3MODS only) . . . . . . . . . . . . . . . . . . . . . . . 15
5.5.6 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6 Board connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.1 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.1.1 USB Micro-B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.1.2 32-pin edge connector for STLINK-V3MODS (STM32 JTAG/SWD, VCP
and bridges) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.1.3 STDC14 for STLINK-V3MINI (STM32 JTAG/SWD and VCP) . . . . . . . . 19
7 Product information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.1 Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.2 Product history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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7.2.1 Product identification LKV3MODS$AT1 . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.2.2 Product identification LKV3MODS$AT2 . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.2.3 Product identification LKV3MINI$AT1 . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.2.4 Product identification LKV3MINI$AT2 . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.3 Board revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.3.1 Board MB1467 revision B-01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.3.2 Board MB1467 revision B-02 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Appendix A STLINK-V3MODS recommended land pattern . . . . . . . . . . . . . . . . 22
Appendix B STLINK-V3MODS board dimensions . . . . . . . . . . . . . . . . . . . . . . . . 23
Appendix C STLINK-V3MODS reference design for voltage adapter . . . . . . . . 24
Appendix D Federal Communications Commission (FCC) and Innovation,
Science and Economic Development Canada (ISED) Compliance
Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
D.1 FCC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
D.2 ISED Compliance Statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

List of tables UM2502
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List of tables
Table 1. Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 2. I/O type definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 3. 32-pin edge connector for STLINK-V3MODS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 4. CN5 STDC14 connector pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 5. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

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UM2502 List of figures
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List of figures
Figure 1. STLINK-V3MODS product top view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. STLINK-V3MINI product top view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 3. STLINK-V3MINI connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 4. STLINK-V3MODS connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 5. Hardware board STLINK-V3MODS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 6. Hardware board STLINK-V3MINI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 7. MB1467 top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 8. MB1467 bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 9. MB1467 mechanical drawing (in millimeters) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 10. CN5 STDC14 connector (Top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 11. STLINK-V3MODS recommended land pattern. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 12. STLINK-V3MODS mechanical dimensions (in millimeters) . . . . . . . . . . . . . . . . . . . . . . . . 23

Features UM2502
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1 Features
Common features
•Tiny 15 mm x 30 mm standalone debugging and programming probes for STM32
microcontrollers
•Self-powered through a USB Micro-B connector
•USB 2.0 high-speed interface
•Probe firmware update through USB
•Optional drag-and-drop Flash memory programming of binary files
•Two-color LEDs: communication, power
•JTAG communication support up to 21 MHz
•SWD (Serial Wire Debug) and SWV (Serial Wire Viewer) communication support up to
24 MHz
•Virtual COM port (VCP) up to 16 Mbps
•3.0 to 3.6 V application voltage support and 5 V tolerant inputs
STLINK-V3MODS features
•Direct-to-PCB implementation by 2 x 16-pin 1.27mm edge castellated vias with all
signals available in a minimum PCB required surface
•Multi-path bridge USB to SPI/UART/I2C/CAN/GPIOs
STLINK-V3MINI features
•1.27 mm pitch STDC14 debug connector with STDC14 to STDC14 flat cable
•STDC14 signals protection
Note: The STLINK-V3MINI tiny probe does not provide any power supply to the target application.

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UM2502 Ordering information
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2 Ordering information
To order the STLINK-V3MODS or STLINK-V3MINI tiny probe, refer to Table 1.
Table 1. Ordering information
Order code
Content
and
references
Description Differentiating feature
STLINK-V3MODS – MB1467(1)
1. Tiny probe board
STLINK-V3 in-circuit debugger
and programmer for STM32
microcontrollers
– 2 x 16-pin castellated vias
STLINK-V3MINI – MB1467(1)
–FFC
(2)
2. Flexible flat cable
– STDC14 connector
– Flexible flat cable

Development environment UM2502
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3 Development environment
The STLINK-V3MODS and STLINK-V3MINI tiny probes run with an STM32 32-bit
microcontroller based on the Arm®(a) Cortex®-M core.
3.1 System requirements
•Multi-OS support: Windows®10, Linux®64-bit, or macOS®(b)(c)(d)
•USB Type-A or USB Type-C®to Micro-B cable
3.2 Development toolchains
•IAR Systems®- IAR Embedded Workbench®(e)
•Keil®- MDK-ARM(e)
•STMicroelectronics - STM32CubeIDE
3.3 Firmware upgrade
The STLINK-V3MODS and STLINK-V3MINI tiny probes embed firmware which needs to be
frequently updated from the www.st.com website to benefit from new functionality or
corrections. Refer to the technical note Overview of ST-LINK derivatives (TN1235) for
details.
a. Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and or elsewhere.
b. macOS®is a trademark of Apple Inc. registered in the U.S. and other countries.
c. Linux®is a registered trademark of Linus Torvalds.
d. All other trademarks are the property of their respective owners.
e. On Windows®only.

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4 Quick start
This section describes how to start development quickly using the STLINK-V3MODS and
STLINK-V3MINI.
Before installing and using these products, accept the Evaluation Product License
Agreement from the www.st.com/epla web page.
The STLINK-V3MODS and STLINK-V3MINI are stand-alone debugging and programming
probes for STM32 microcontrollers.
•They support protocols JTAG and SWD to communicate with any STM32
microcontroller.
•They provide a Virtual COM port interface allowing the host PC to communicate with
the target microcontroller through one UART
•The STLINK-V3MODS provides bridge interfaces to several communication protocols
allowing for instance the programming of the target through the bootloader.
To start using STLINK-V3MINI, follow the steps below:
1. Check that the STDC14 to STDC14 flat cable is present inside the box.
2. Install/update the IDE/STM32CubeProgrammer to support the STLINK-V3MINI
(drivers).
3. Connect the flat cable between the STLINK-V3MINI and the application.
4. Connect a USB Type-A to Micro-B cable between the STLINK-V3MINI and the PC.
5. Check that the PWR LED is green and the COM LED is red.
6. Open the development toolchain or STM32CubeProgrammer software utility. For more
details, refer to the www.st.com/stlink-v3mini website.
Using STLINK-V3MODS requires to be firstly soldered onto the destination application
including the targeted STM32 microcontroller. Some recommendations are given here:
1. Reserve in the design the necessary PCB area under the STLINK-V3MODS by using
the recommended PCB land pattern.
2. Apply the recommended reflow soldering profile, from Soldering recommendations and
package information for Lead-free ECOPACK microcontrollers (AN2639), and verify
that contacts between host board and module meet the IPC Specification (see IPC-A-
610-F Acceptability of Electronic Assemblies).
3. Install/update the IDE/STM32CubeProgrammer to support the STLINK-V3MODS
(drivers).
4. Power supply the application board.
5. Connect a USB Type-A to Micro-B cable between the STLINK-V3MODS and the PC.
6. Check that the PWR LED is green and the COM LED is red.
7. Open the development toolchain or STM32CubeProgrammer software utility. For more
details, refer to the www.st.com/stlink-v3mods website.

STLINK-V3MODS and STLINK-V3MINI functional description UM2502
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5 STLINK-V3MODS and STLINK-V3MINI functional
description
5.1 STLINK-V3MODS and STLINK-V3MINI overview
STLINK-V3MODS and STLINK-V3MINI are stand-alone debugging and programming tiny
probes for STM32 microcontrollers. These products support many functions and protocols
for debugging, programming, or communicating with one or several targets.
These modules are fully powered by the PC. If the COM LED blinks red, refer to the
technical note Overview of ST-LINK derivatives (TN1235) for details.
5.2 STLINK-V3MODS and STLINK-V3MINI frequency selection
The STLINK-V3MODS and STLINK-V3MINI run internally at three different frequencies:
•high-performance frequency
•standard frequency, compromising between performance and consumption
•low-consumption frequency
By default, the STLINK-V3MODS and STLINK-V3MINI start in high-performance frequency.
It is the responsibility of the toolchain provider to propose or not the frequency selection at
the user level.
5.3 High-performance modules
The STLINK-V3MODS and STLINK-V3MINI support high-performance configuration for
STM32 microcontrollers. The working voltage range is from 3.0 to 3.6 V.
The protocols and functions supported are:
•SWD (up to 24 MHz) with SWO (up to 16 MHz)
•JTAG (up to 21 MHz)
•VCP (from 732 bps to 16 Mbps)