ST-LINK/V2 In-Circuit Debugger/Programmer for STM8 and STM32
User Manual
Introduction
The ST-LINK/V2 is an in-circuit debugger/programmer for the STM8 and STM32 microcontroller families. The single wire interface module (SWIM) and JTAG/serial wire debugging (SWD) interfaces facilitate communication with any STM8 or STM32 microcontroller located on an application board.
In addition to providing the same functionalities as 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 allows communication with a PC and:
- STM8 devices via ST Visual Develop (STVD) or ST Visual Program (STVP) software (which are available from STMicroelectronics).
- STM32 devices via Atollic®, IAR™, Keil®, and TASKING 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 V to 5.5 V application voltage supported on SWIM interface
- SWIM low-speed and high-speed modes supported
- SWIM programming-speed rate: 9.7 Kbytes/s in low speed and 12.8 Kbytes/s in 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 V to 3.6 V application voltage supported on the JTAG/SWD interface and 5 V tolerant inputs
- JTAG cable for connection to a standard JTAG 20-pin pitch 2.54 mm connector
- Supports JTAG communication
- Supports serial wire debug (SWD) and serial wire viewer (SWV) communication
- Direct firmware update feature supported (DFU)
- Status LED which blinks during communication with the PC
- 1000 VRMS high isolation voltage (ST-LINK/V2-ISOL only)
- Operating temperature 0 to 50 °C
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: ST-LINK/V2 product contents and Figure 3: ST-LINK/V2-ISOL product contents. They include (from left to right in Figure 2 and Figure 3):
- 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® 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.
4.1 Connection with STM8 applications
For STM8 developments, the ST-LINK/V2 can be connected to the target board by two different cables, depending on the connector available on the application board.
These cables are:
- SWIM flat ribbon with a standard ERNI connector at one end
- SWIM cable with two 4-pin, 2.54 mm connector or SWIM separate-wires cable
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 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 connection of the SWIM cable in the correct position 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.
See Figure 12: SWIM ST-LINK/V2 low-cost cable.
4.1.3 SWIM signals and connections
Table 2 summarizes the signal names, functions, and target connection signals 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.
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 | BOOTO | ||
| 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) BOOTO, UART-TX and UART-RX are reserved for future developments.
4.2 Connection with STM32 applications
For STM32 developments, the ST-LINK/V2 needs to 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 (JTAG) | 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 | GND | GND(3) | GND(3) |
| 5 | TDI | JTAG TDO | JTDI | GND(2) |
| 6 | GND | GND | GND(3) | GND(3) |
| 7 | TMS_SWDIO | JTAG TMS, SW IO | JTMS | SWDIO |
| 8 | GND | GND | GND(3) | GND(3) |
| 9 | TCK_SWCLK | JTAG TCK, SW CLK | JTCK | SWCLK |
| 10 | GND | GND | GND(3) | GND(3) |
| 11 | NC | Not connected | Not connected | Not connected |
| 12 | GND | GND | GND(3) | GND(3) |
| 13 | TDO_SWO | JTAG TDI, SWO | JTDO | TRACESWO(4) |
| 14 | GND | GND | GND(3) | GND(3) |
| 15 | NRST | NRST | NRST | NRST |
| 16 | GND | GND | GND(3) | GND(3) |
| 17 | NC | Not connected | Not connected | Not connected |
| 18 | GND | GND | GND(3) | GND(3) |
| 19 | VDD | VDD (3.3V)(5) | Not connected | Not connected |
| 20 | GND | GND | GND(3) | GND(3) |
(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) Connect to GND for noise reduction on the ribbon.
(3) At least one of this pin must be connected to the ground for correct behavior (connecting all of them is recommended).
(4) Optional: for Serial Wire Viewer (SWV) trace.
(5) Available on ST-LINK/V2 only and not connected on ST-LINK/V2/OPTO.
Figure 9 shows how to connect the ST-LINK/V2 to a target using the JTAG cable.
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-pins-2.54mm-pitch-connector footprint is too big, it is possible to implement the Tag-Connect solution to save cost and space on the application board. The Tag-Connect adapter and cable provide a simple reliable means of connecting ST-LINK/V2 or ST-LINK/V2-ISOL to the PCB without requiring a mating component on 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 LEDs
The LED labeled 'COM' on top of the ST-LINK/V2 shows the ST-LINK/V2 status (whatever the connection type).
When the:
- 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 being 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 might evolve during the whole life of the ST-LINK/V2 product (new functionality, bug fixes, support for new microcontroller families ...), it is recommended to visit www.st.com/stlinkv2 periodically in order to stay up-to-date with the latest firmware 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, Atollic® TrueSTUDIO, IAR™ EWARM, Keil® MDK-ARM™, and TASKING VX-toolset support ST-LINK/V2 according to the versions given in Table 5 or in the most recent version available.
| Third party | Toolchain | Version |
|---|---|---|
| Atollic® | TrueSTUDIO | 2.1 |
| IAR™ | EWARM | 6.20 |
| Keil® | MDK-ARM™ | 4.20 |
| TASKING | VX-toolset for ARM® Cortex®-M | 4.0.1 |
The ST-LINK/V2 requires a dedicated USB driver. If the toolset installed it automatically, the file stlink_winusb.inf is installed in <WINDIR>/inf (where <WINDIR> is typically C:/Windows).
If the toolset setup did not install it automatically, the driver can be found on www.st.com:
- Connect to www.st.com.
- In the search tab, part number field, look for ST-LINK/V2.
- Click on the Generic Part Number column hyperlink to ST-LINK/V2.
- In the Design support tab, SW drivers section, click on the icon to download st-link_v2_usbdriver.zip.
- Unzip and run ST-Link_V2_USBdriver.exe.
For more information on third-party tools, visit the following websites:
- www.atollic.com
- www.iar.com
- www.keil.com
- www.tasking.com
Schematics
Note: connector located on the edge of the board
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
| Date | Revision | Changes |
|---|---|---|
| 22-Apr-2011 | 1 | Initial release. |
| 03-Jun-2011 | 2 | 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. |
| 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 5. 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. |
