STMicroelectronics ST-LINK/V2 In Circuit Debugger Programmer User Manual

STMicroelectronics ST-LINKV2 In Circuit Debugger Programmer

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.
  

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

Ordering information

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

Table 1. List of the order codes

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.

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 (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)
  
  

Hardware configuration

The ST-LINK/V2 is designed around the STM32F103C8 device, which incorporates the high-performance Arm®(a) 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.

1. A = STM32 JTAG and SWD target connector
2. B = STM8 SWIM target connector
3. C = STM8 SWIM, STM32 JTAG, and SWD target connector
4. D = Communication activity LED

a. Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.

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

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.

1. A = Target application board with ERNI connector
2. B = Wire cable with ERNI connector at one end
3. C = STM8 SWIM target connector
4. See Figure 11

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.

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.

1. A = Target application board with 4-pin, 2.54 mm, low-cost connector
2. B = Wire cable with a 4-pin connector or separate-wires cable
3. C = STM8 SWIM target connector
4. See Figure 12

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.

Table 2. SWIM flat ribbon connections for ST-LINK/V2

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.
   

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.

Table 3. SWIM low-cost cable connections for ST-LINK/V2-ISOL

(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.

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.

Table 4. JTAG/SWD cable connections

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| GND(4)| 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

1. A = Target application board with JTAG connector
2. B = JTAG/SWD 20-wire flat cable
3. C = STM32 JTAG and SWD target 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.

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:

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

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

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.

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).

STM32 application development and flash programming
Third-party toolchains (IAR™ EWARM, Keil® MDK-ARM™) support ST-LINK/V2 according to the versions given in Table 5 or in the most recent version available.

Table 5. How third-party toolchains support ST-LINK/V2

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:

• www.iar.com
• www.keil.com

Schematics

1. Legend for pin descriptions:
   VDD = Target voltage sense
   DATA = SWIM DATA line between target and debug tool
   GND = Ground voltage
   RESET = Target system reset

1. Legend for pin descriptions:
   VDD = Target voltage sense
   DATA = SWIM DATA line between target and debug tool
   GND = Ground voltage
   RESET = Target system reset

Revision history

Table 6. Document revision history

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.

19-Aug-2011| 3| Added USB driver details to Section 5.3.
11-May-2012| 4| Added SWD and SWV to JTAG connection features. Modified

Table 4: JTAG/SWD cable connections.

13-Sep-2012| 5| Added ST-LINK/V2-ISOL order code.

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.

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References

• IAR
• Keil Embedded Development Tools for Arm, Cortex-M, Cortex-R4, 8051, C166, and 251 processor families.
• Tag-Connect | Tag-Connect

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