Manuals+

ST-LINK/V2 In-Circuit Debugger/Programmer

User Manual for STM8 and STM32

Introduction

The ST-LINK/V2 is an in-circuit debugger/programmer for the STM8 and STM32 microcontrollers. The single wire interface module (SWIM) and the JTAG/serial wire debugging (SWD) interfaces facilitate the communication with any STM8 or STM32 microcontroller operating on an application board.

In addition to providing the same functionalities of the ST-LINK/V2, the ST-LINK/V2-ISOL features digital isolation between the PC and the target application board. It also withstands voltages of up to 1000 VRMS.

The USB full-speed interface enables communication with a PC and:

  • STM8 devices via ST Visual Develop (STVD) or ST Visual Program (STVP) software (available from STMicroelectronics)
  • STM32 devices via IAR™, Keil®, STM32CubeIDE, STM32CubeProgrammer, and STM32CubeMonitor integrated development environments.

Figure 1: ST-LINK/V2 and ST-LINK/V2-ISOL

This figure shows two devices. The left device is labeled 'ST-LINK/V2' and features the ST logo. The right device is labeled 'ST-LINK/V2-ISOL' and also features the ST logo, along with 'ISOL' and 'STM8 & STM32' text. Both devices have USB connectors and indicator LEDs.

Features

  • 5 V power supplied by a USB connector
  • USB 2.0 full speed compatible interface
  • USB standard A to Mini-B cable
  • SWIM specific features:
    • 1.65 to 5.5 V application voltage supported on SWIM interface
    • SWIM low-speed and high-speed modes supported
    • SWIM programming-speed rate: 9.7 and 12.8 Kbytes/s, respectively, for low and high speed
    • SWIM cable for connection to the application via an ERNI standard vertical (ref: 284697 or 214017) or horizontal (ref: 214012) connector
    • SWIM cable for connection to the application via a pin header or a 2.54 mm pitch connector
  • JTAG/serial wire debugging (SWD) specific features:
    • 1.65 to 3.6 V application voltage supported on the JTAG/SWD interface and 5 V tolerant inputs(a)
    • JTAG cable for connection to a standard JTAG 20-pin pitch 2.54 mm connector
    • Supports JTAG communication, up to 9 MHz (default: 1.125 MHz)
    • Supports serial wire debug (SWD) up to 4 MHz (default: 1.8 MHz), and serial wire viewer (SWV) communication, up to 2 MHz
  • Direct firmware update feature supported (DFU)
  • Status LED, blinking during communication with the PC
  • 1000 VRMS high isolation voltage (ST-LINK/V2-ISOL only)
  • Operating temperature from 0 to 50 °C

(a) The ST-LINK/V2 can communicate with targets operating below 3.3 V, but generates output signals at this voltage level. STM32 targets are tolerant to this over-voltage. If some other components of the target board are sensible, use ST-LINK/V2-ISOL, STLINK-V3MINIE or STLINK-V3SET with B-STLINK-VOLT adapter to avoid impact of over-voltage injection on the board.

Ordering Information

To order the ST-LINK/V2, refer to Table 1.

Order code ST-LINK description
ST-LINK/V2 In-circuit debugger/programmer
ST-LINK/V2-ISOL In-circuit debugger/programmer with digital isolation

Product Contents

The cables delivered within the product are shown in Figure 2 and Figure 3. They include (from left to right):

  • USB standard A to Mini-B cable (A)
  • ST-LINK/V2 debugging and programming unit (B)
  • SWIM low-cost connector (C)
  • SWIM flat ribbon with a standard ERNI connector at one end (D)
  • JTAG or SWD and SWV flat ribbon with a 20-pin connector (E)

Figure 2: ST-LINK/V2 product contents

This figure displays the contents of the ST-LINK/V2 package. It shows five items labeled A through E: A is a black USB cable, B is the white ST-LINK/V2 unit, C is a small black connector with wires, D is a flat ribbon cable with an ERNI connector, and E is a wider flat ribbon cable with a 20-pin connector.

Figure 3: ST-LINK/V2-ISOL product contents

This figure displays the contents of the ST-LINK/V2-ISOL package, similar to Figure 2. It shows five items labeled A through E: A is a white USB cable, B is the white ST-LINK/V2-ISOL unit, C is a black connector with colored wires (red, green, blue, yellow), D is a flat ribbon cable with an ERNI connector, and E is a wider flat ribbon cable with a 20-pin connector.

Hardware Configuration

The ST-LINK/V2 is designed around the STM32F103C8 device, which incorporates the high-performance Arm® Cortex®-M3 core. It is available in a TQFP48 package.

As shown in Figure 4, the ST-LINK/V2 provides two connectors:

  • An STM32 connector for the JTAG/SWD and SWV interface
  • An STM8 connector for the SWIM interface

The ST-LINK/V2-ISOL provides one connector for the STM8 SWIM, STM32 JTAG/SWD, and SWV interfaces.

Figure 4: ST-LINK/V2 (on the left) and ST-LINK/V2-ISOL (on the right) connectors

This figure shows two devices. The left device, ST-LINK/V2, has two distinct connectors labeled A (for STM32 JTAG/SWD) and B (for STM8 SWIM). The right device, ST-LINK/V2-ISOL, has a single connector labeled C, which supports STM8 SWIM and STM32 JTAG/SWD interfaces. Both devices have a communication activity LED labeled D.

4.1 Connection with STM8

For the development of applications based on STM8 microcontrollers, the ST-LINK/V2 can be connected to the target board by two different cables, depending upon the connector available on the application board. These cables are:

  • A SWIM flat ribbon with a standard ERNI connector at one end
  • A SWIM cable with two 4-pin, 2.54 mm connectors or SWIM separate-wires cables

4.1.1 Standard ERNI connection with SWIM flat ribbon

Figure 5 shows how to connect the ST-LINK/V2 if a standard ERNI 4-pin SWIM connector is present on the application board.

Figure 5: ERNI connector

This figure illustrates connecting the ST-LINK/V2 to a target board with an ERNI connector. It shows the ST-LINK/V2 unit connected via a flat ribbon cable (labeled B) to a target application board (labeled A) which has an ERNI connector. The connector on the ST-LINK/V2 unit is labeled C.

Figure 6 shows that pin 16 is missing on the ST-LINK/V2-ISOL target connector. This missing pin is used as a safety key on the cable connector, to guarantee the correct position of the SWIM cable on the target connector even pins, used for both SWIM and JTAG cables.

4.1.2 Low-cost SWIM connection

Figure 7 shows how to connect the ST-LINK/V2 if a 4-pin, 2.54 mm, low-cost SWIM connector is present on the application board.

Figure 7: Low-cost connection

This figure illustrates connecting the ST-LINK/V2 to a target board using a low-cost 4-pin connector. It shows the ST-LINK/V2 unit connected via a wire cable (labeled B) to a target application board (labeled A) which has a 4-pin connector. The connector on the ST-LINK/V2 unit is labeled C.

Figure 6: Key detail on connectors

This figure shows close-ups of connectors. The first image shows the 20-pin JTAG/SWD connector on the ST-LINK/V2. The second image shows a detail of a connector, possibly highlighting pin configurations. The third image shows the ST-LINK/V2-ISOL unit with its single connector.

4.1.3 SWIM signals and connections

Table 2 summarizes the signal names, functions, and target connection signals when using the wire cable with a 4-pin connector.

Pin no. Name Function Target connection
1 VDD Target VCC(1) MCU VCC
2 DATA SWIM MCU SWIM pin
3 GND GROUND GND
4 RESET RESET MCU RESET pin

(1) The power supply from the application board is connected to the ST-LINK/V2 debugging and programming board to ensure signal compatibility between both boards.

Figure 8: Target SWIM connector

This figure shows a 4-pin connector layout for a target SWIM connection, with pins labeled 1-VDD, 2-DATA, 3-GND, and 4-RESET.

Table 3 summarizes the signal names, functions, and target connection signals using the separate-wires cable.

As the SWIM separate-wires cable has independent connectors for all pins on one side, it is possible to connect the ST-LINK/V2-ISOL to an application board without a standard SWIM connector. On this flat ribbon, all signals are referenced by a specific color and a label to ease the connection on target.

Color Cable pin name Function Target connection
Red TVCC Target VCC(1) MCU VCC
Green UART-RX Unused Reserved(2) (not connected on the target board)
Blue UART-TX
Yellow BOOT0
Orange SWIM SWIM MCU SWIM pin
Black GND GROUND GND
White SWIM-RST RESET MCU RESET pin

(1) The power supply from the application board is connected to the ST-LINK/V2 debugging and programming board to ensure signal compatibility between both boards.

(2) BOOT0, UART-TX and UART-RX are reserved for future developments.

TVCC, SWIM, GND, and SWIM-RST can be connected to a low-cost 2.54 mm pitch connector or to pin headers available on the target board.

4.2 Connection with STM32

For development of applications based on STM32 microcontrollers, the ST-LINK/V2 must be connected to the application using the standard 20-pin JTAG flat ribbon provided.

Table 4 summarizes the signals names, functions, and target connection signals of the standard 20-pin JTAG flat ribbon.

Pin no. ST-LINK/V2 connector (CN3) ST-LINK/V2 function Target connection (JTAG) Target connection (SWD)
1 VAPP Target VCC MCU VDD(1) MCU VDD(1)
2
3 TRST JTAG TRST JNTRST GND(2)
4 GND(3) GND(3) GND(3)(4) GND(3)(4)
5 TDI JTAG TDO JTDI GND(2)
6 GND(3) GND(3) GND(3)(4) GND(3)(4)
7 TMS_SWDIO JTAG TMS, SW IO JTMS SWDIO
8 GND(3) GND(3) GND(3)(4) GND(3)(4)
9 TCK_SWCLK JTAG TCK, SW CLK JTCK SWCLK
10 GND(5) GND(5) GND(4)(5) GND(4)(5)
11 Not connected Not connected Not connected Not connected
12 GND GND GND(4) GND(4)
13 TDO_SWO JTAG TDI, SWO JTDO TRACESWO(6)
14 GND(5) GND(5) GND(4)(5) GND(4)(5)
15 NRST NRST NRST NRST
16 GND(3) GND(3) GND(3)(4) GND(3)(4)
17 Not connected Not connected Not connected Not connected
18 GND GND GND(4) GND(4)
19 VDD(3) VDD (3.3 V)(3) Not connected Not connected
20 GND GND Not connected GND(4)

(1) The power supply from the application board is connected to the ST-LINK/V2 debugging and programming board to ensure signal compatibility between the boards.

(2) Connect to GND for noise reduction on the ribbon.

(3) Available on ST-LINK/V2 only, not connected on ST-LINK/V2-ISOL.

(4) At least one of these pin must be connected to the ground for correct behavior, it is recommended to connecting all of them.

(5) GND on ST-LINK/V2, used by SWIM on ST-LINK/V2-ISOL (see Table 3).

(6) Optional: for Serial Wire Viewer (SWV) trace.

Figure 9 shows how to connect the ST-LINK/V2 to a target using the JTAG cable.

Figure 9: JTAG and SWD connection

This figure illustrates connecting the ST-LINK/V2 to a target board using a 20-pin JTAG/SWD cable. The ST-LINK/V2 unit (labeled C) is connected via a 20-wire flat cable (labeled B) to a target application board (labeled A) which has a JTAG connector.

The reference of the connector needed on the target application board is: 2x10C header wrapping 2x40C H3/9.5 (pitch 2.54) - HED20 SCOTT PHSD80.

Figure 10: JTAG debugging flat ribbon layout

This figure shows the pinout of a 20-pin JTAG debugging flat ribbon cable. The pins are numbered 1 to 20, with pins 1-19 shown on the top row and pins 2-20 shown on the bottom row, viewed from the PCB side.

Note: For low cost applications, or when the standard 20-pin 2.54 mm-pitch connector footprint is too big, it is possible to implement the Tag-Connect solution. The Tag-Connect adapter and cable provide a simple and reliable means of connecting ST-LINK/V2 or ST-LINK/V2-ISOL to the PCB without requiring a mating component on the application PCB.

For more details on this solution and application-PCB-footprint information, visit www.tag-connect.com.

The references of components compatible with JTAG and SWD interfaces are:

  • TC2050-ARM2010 adapter (20-pin- to 10-pin-interface board)
  • TC2050-IDC or TC2050-IDC-NL (No Legs) (10-pin cable)
  • TC2050-CLIP retaining clip for use with TC2050-IDC-NL (optional)

4.3 ST-LINK/V2 status LED

The LED labeled COM on top of the ST-LINK/V2 shows the ST-LINK/V2 status (whatever the connection type). In detail:

  • LED is blinking RED: the first USB enumeration with the PC is taking place
  • LED is RED: communication between the PC and ST-LINK/V2 is established (end of enumeration)
  • LED is blinking GREEN / RED: data are exchanged between the target and the PC
  • LED is GREEN: the last communication has been successful
  • LED is ORANGE: ST-LINK/V2 communication with the target has failed.

Software Configuration

5.1 ST-LINK/V2 firmware upgrade

The ST-LINK/V2 embeds a firmware upgrade mechanism for in-situ upgrade through the USB port. As the firmware can evolve during the life of the ST-LINK/V2 product (new functionality, bug fixes, support for new microcontroller families), it is recommended to periodically visit the dedicated pages on www.st.com to stay up-to-date with the latest version.

5.2 STM8 application development

Refer to ST toolset Pack24 with Patch 1 or more recent, which includes ST Visual Develop (STVD) and ST Visual Programmer (STVP).

5.3 STM32 application development and flash programming

Third-party toolchains (IAR™, Keil® MDK-ARM™) support ST-LINK/V2 according to the versions given in Table 5 or in the most recent version available.

Third party Toolchain Version
IAR™ EWARM 6.20
Keil® MDK-ARM™ 4.20

The ST-LINK/V2 requires a dedicated USB driver. If the toolset setup does not install it automatically, the driver can be found on www.st.com under the name STSW-LINK009.

For more information on third-party tools, visit the following websites:

Schematics

Figure 11: SWIM ST-LINK/V2 standard ERNI cable

This figure illustrates the standard ERNI cable connection for the ST-LINK/V2. It shows the target board with horizontal and vertical mount options, the ERNI connector (part number 224394), the cable itself (100mm length), and the ST-LINK/V2 board with its male connector (part number 02 20 227 2041) and female connector (part number 02 201 3047). Pin descriptions for VDD, DATA, GND, and RESET are provided.

Figure 12: SWIM ST-LINK/V2 low-cost cable

This figure illustrates the low-cost cable connection for the ST-LINK/V2. It shows the target board with its PCB and application male connector (part number 02 20 227 2041), the low-cost female connector (part number 02 201 3047), the cable (100mm length), and the ST-LINK/V2 board with its male connector (part number 02 20 227 2041) and female connector (part number 02 201 3047). Pin descriptions for VDD, DATA, GND, and RESET are provided.

Revision History

Date Revision Changes
22-Apr-2011 1 Initial release. Table 2: SWIM flat ribbon connections for ST-LINK/V2: added footnote 1 to the function "Target VCC". Table 4: JTAG/SWD cable connections: added footnote to the function "Target VCC". Table 5: How third-party toolchains support ST-LINK/V2: updated the "Versions" of IAR and Keil.
03-Jun-2011 2 Added USB driver details to Section 5.3.
19-Aug-2011 3 Added SWD and SWV to JTAG connection features. Modified Table 4: JTAG/SWD cable connections.
11-May-2012 4 Added ST-LINK/V2-ISOL order code.
13-Sep-2012 5 Updated Section 4.1: STM8 application development on page 15. Added Note 6 in Table 4. Added Note "For low cost applications..." before Section 3.3: ST-LINK/V2 status LEDs on page 14.
18-Oct-2012 6 Added Section 5.1: ST-LINK/V2 firmware upgrade on page 15.
25-Mar-2016 7 Updated VRMS value in Introduction and in Features.
18-Oct-2018 8 Updated Table 4: JTAG/SWD cable connections and its footnotes. Minor text edits across the whole document.
09-Jan-2023 9 Updated Introduction, Features, and Section 5.3: STM32 application development and flash programming. Updated Table 5: How third-party toolchains support ST-LINK/V2. Minor text edits across the whole document.

Important Notice

STMicroelectronics NV and its subsidiaries ("ST") reserve the right to make changes, corrections, enhancements, modifications, and improvements to 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 acknowledgment.

Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of purchasers' products.

No license, express or implied, to any intellectual property right is granted by ST herein.

Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.

ST and the ST logo are trademarks of ST. For additional information about ST trademarks, refer to www.st.com/trademarks. All other product or service names are the property of their respective owners.

Information in this document supersedes and replaces information previously supplied in any prior versions of this document.

© 2023 STMicroelectronics - All rights reserved

Models: ST-LINK V2 In Circuit Debugger Programmer, ST-LINK V2, In Circuit Debugger Programmer, Circuit Debugger Programmer, Debugger Programmer, Programmer

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