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STLINK-V3MODS and STLINK-V3MINI debugger/programmer
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.
Note:
STLINK-V3MINI is obsolete and has been replaced by STLINK-V3MINIE. For more
information, refer to the corresponding product pages at st.com.
Figure 1. STLINK-V3MODS product top view
Pictures are not contractual.
June 2025
tiny probes for STM32 microcontrollers
Figure 2. STLINK-V3MINI product top view
UM2502 Rev 3
UM2502
User manual
www.st.com
1/32
1
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Table of Contents
Related Manuals for ST STLINK-V3MODS
Summary of Contents for ST STLINK-V3MODS
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Page 1: Figure 1. Stlink-V3Mods Product Top View
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. -
Page 2: Table Of Contents
STLINK-V3MODS and STLINK-V3MINI overview ....10 STLINK-V3MODS power scheme ......10 5.2.1... - Page 3 Appendix A STLINK-V3MODS recommended land pattern ....28 Appendix B STLINK-V3MODS board dimensions ......29 Appendix C STLINK-V3MODS reference design for voltage adapter .
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Page 4: List Of Tables
32-pin edge connector for STLINK-V3MODS ........ - Page 5 Figure 12. STLINK-V3MODS recommended land pattern ........28 Figure 13.
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Page 6: Features
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 1.27 mm edge castellated vias with all signals available in a minimum PCB required surface •... -
Page 7: Ordering Information
UM2502 Ordering information Ordering information To order the STLINK-V3MODS or STLINK-V3MINI tiny probe, refer to Table Table 1. Ordering information Content Order code Description Differentiating feature references STLINK-V3MODS – MB1467 – 2 x 16-pin castellated vias STLINK-V3 in-circuit debugger and programmer for STM32 –... -
Page 8: Development Environment
• Keil - MDK-ARM • STMicroelectronics - STM32CubeIDE 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. -
Page 9: Quick Start
Using STLINK-V3MODS requires to be firstly soldered onto the destination application including the targeted STM32 microcontroller. Some recommendations are given here: Reserve in the design the necessary PCB area under the STLINK-V3MODS by using the recommended PCB land pattern. Apply the recommended reflow soldering profile, from Soldering recommendations and... -
Page 10: Stlink-V3Mods And Stlink-V3Mini Functional Description
If another power source is available on the board for the target part, it is not necessary to use pin 22 of the right-edge pin connector to power it. In this case, it is still possible to use STLINK-V3MODS for debugging, but the following must be considered: •... -
Page 11: Stlink-V3Mods And Stlink-V3Mini Frequency Selection
If the target is never (or no longer) expected to be powered by the ST-LINK, either do not connect anything to pin 22 of the right-edge pin connector, or remove SB1 to avoid any risk of conflict on the signal, even in the case of a firmware bug. -
Page 12: Figure 3. Stlink-V3Mini Connections
STLINK-V3MODS and STLINK-V3MINI functional description UM2502 Figure 3. STLINK-V3MINI connections connection application MSv61219V1 Figure 4. STLINK-V3MODS connections connection Host board MSv61220V1 For the STLINK-V3MODS, the connections are done with the host board by tracks. 12/32 UM2502 Rev 3... -
Page 13: Hardware Layout
Figure 5 shows the STLINK-V3MODS and Figure 6 the STLINK-V3MINI. Figure 7 Figure 8 show the top and bottom layouts for MB1467, which is the common board reference for STLINK-V3MODS and STLINK-V3MINI. Figure 5. Hardware board STLINK-V3MODS UM2502 Rev 3 13/32... -
Page 14: Figure 6. Hardware Board Stlink-V3Mini
STLINK-V3MODS and STLINK-V3MINI functional description UM2502 Figure 6. Hardware board STLINK-V3MINI Figure 7. MB1467 top layout USB Micro-B connector to PC Force reset (CN4) COM LED (LD1) 2 x 16-pin edge connector STM32F723 castellated vias microcontroller 5 V power LED... -
Page 15: Figure 8. Mb1467 Bottom Layout
UM2502 STLINK-V3MODS and STLINK-V3MINI functional description Figure 8. MB1467 bottom layout STDC14 connector (CN5) (STLINK-V3MINI only) MSv61224V2 Figure 9. MB1467 mechanical drawing (in millimeters) UM2502 Rev 3 15/32... -
Page 16: Stlink-V3Mods And Stlink-V3Mini Functions
STM32 target flash memory with drag-and-drop action of a binary file from a file explorer. This ability requires the STLINK-V3MODS or STLINK-V3MINI tiny probe to identify the connected target before enumerating it on the USB host. -
Page 17: Figure 10. Firmware Selection For A Second Virtual Com Port
UM2502 STLINK-V3MODS and STLINK-V3MINI functional description Bridge SPI SPI signals are available on CN2 pins 7, 14, 23, and 25. Bridge I C signals are available on CN2 pins 16 and 17. It is necessary to add external 680 Ω pull- up resistors on the host application board. -
Page 18: Leds
STLINK-V3MODS and STLINK-V3MINI functional description UM2502 5.6.6 LEDs Power LED: The red light indicates that 5 V is enabled. COM LED: Refer to the technical note Overview of ST-LINK derivatives (TN1235) for details. Fault LED: Indicates USB overcurrent request. 18/32 UM2502 Rev 3... -
Page 19: Board Connectors
Input only pin Output only pin Input/Output pin 6.1.1 USB Micro-B The CN5 USB connector is used to connect the embedded STLINK-V3MODS or STLINK- V3MINI to the PC. 6.1.2 32-pin edge connector for STLINK-V3MODS (STM32 JTAG/SWD, VCP and bridges) Table 3. 32-pin edge connector for STLINK-V3MODS... - Page 20 200 mA. Exceeding this maximum output current over 200 mA may damage the device or cause communication issues with the host PC (A PC standard USB connector cannot provide more than 500 mA by the USB port and STLINK-V3MODS can request dynamic current surges during target devices programming).
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Page 21: Stdc14 For Stlink-V3Mini (Stm32 Jtag/Swd And Vcp)
UM2502 Board connectors 6.1.3 STDC14 for STLINK-V3MINI (STM32 JTAG/SWD and VCP) The CN5 STDC14 connector allows the connection to an STM32 target using the JTAG or ® ® SWD protocol, respecting (from pin 3 to pin 12) the ARM10 pinout (Arm Cortex debug connector). -
Page 22: Product Information
• On the targeted STM32 that is soldered on the board (for an illustration of STM32 marking, refer to the STM32 datasheet Package information paragraph at the www.st.com website). • Next to the evaluation tool ordering part number that is stuck or silk-screen printed on the board. -
Page 23: Product History
UM2502 Product information Product history Table 5. Product history Order Product Product change Product details Product limitations code identification description Board: LKV3MODS$AT1 Initial revision No limitation – MB1467-V3MODS-B01 (Tiny probe board) Board: Tiny probe board revision LKV3MODS$AT2 No limitation – MB1467-V3MODS-B02 changed (Tiny probe board) –... -
Page 24: Safety Certification Information
Safety certification information UM2502 Safety certification information The product must be powered by a power supply unit or auxiliary equipment complying with standard EN 62368-1:2014+A1:2017 or the standard replacing it, and must be safety extralow voltage (SELV) with limited power capability. 24/32 UM2502 Rev 3... -
Page 25: Federal Communications Commission (Fcc) And Innovation, Science And Economic Development Canada (Ised) Compliance
UM2502 Federal Communications Commission (FCC) and Innovation, Science and Economic De- Federal Communications Commission (FCC) and Innovation, Science and Economic Development Canada (ISED) Compliance Statements FCC Compliance Statement Part 15.19 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. -
Page 26: Ised Compliance Statement
Federal Communications Commission (FCC) and Innovation, Science and Economic Develop- ISED Compliance Statement ISED Canada ICES-003 Compliance Label: CAN ICES-3 (B) / NMB-3 (B). Étiquette de conformité à la NMB-003 d'ISDE Canada : CAN ICES-3 (B) / NMB-3 (B). Note: Use a shielded USB cable with a length of less than 0.5 m and ferrite on the computer side, like WURTH ELEKTRONIK 742 711 12. -
Page 27: Product Disposal
UM2502 Product disposal Product disposal Disposal of this product: WEEE (Waste Electrical and Electronic Equipment) (Applicable in Europe) This symbol on the product, accessories, or accompanying documents indicates that the product and its electronic accessories should not be disposed of with household waste at the end of their working life. -
Page 28: Appendix A Stlink-V3Mods Recommended Land Pattern
STLINK-V3MODS recommended land pattern UM2502 Appendix A STLINK-V3MODS recommended land pattern Figure 12. STLINK-V3MODS recommended land pattern PCB edge of the host board Do not place components in this area MB1467 3 mm min. 15.24 mm 28/32 UM2502 Rev 3... -
Page 29: Appendix Bstlink-V3Mods Board Dimensions
UM2502 STLINK-V3MODS board dimensions Appendix B STLINK-V3MODS board dimensions Figure 13. STLINK-V3MODS mechanical dimensions (in millimeters) 9.60 mm 2.82 mm 1.12 mm 15.24 mm MSv55156V1 UM2502 Rev 3 29/32... -
Page 30: Appendix Cstlink-V3Mods Reference Design For Voltage Adapter
STLINK-V3MODS reference design for voltage adapter A document describing how to connect a voltage adapter to the STLINK-V3MODS is available on the www.st.com/stlink-v3mods website under the CAD resources tab. This document is given as a guidance and reference design helping customers how to realize a 1.65 to 3.60 V voltage adapter to the STLINK-V3MODS compact in-circuit debugger and... -
Page 31: Revision History
V3MODS and STLINK-V3MINI functional description Added: – 5 V source output capability subsection – STLINK-V3MODS board dimensions with new Figure 13 – STLINK-V3MODS reference design for voltage 14-Dec-2021 adapter Updated: – Title, Features, Figure Figure Table 3 Table 4 –... - Page 32 ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.
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