Hardware layout and configuration UM1956
14/31 DocID028406 Rev 1
The features not supported on ST-LINK/V2-1 are:
• SWIM interface
• Minimum supported application voltage limited to 3V
Known limitation:
• Activating the readout protection on the STM32 target, prevents the target application
from running afterwards. The target readout protection must be kept disabled on ST-
LINK/V2-1 boards.
The embedded ST-LINK/V2-1 is directly connected to the SWD port of the target STM32.
6.1.1 Drivers
The ST-LINK/V2-1 requires a dedicated USB driver, which, for Windows XP, 7 and 8, can be
found at www.st.com.
In case the STM32 Nucleo board is connected to the PC before the driver is installed, some
Nucleo interfaces may be declared as “Unknown” in the PC device manager. In this case
the user must install the driver files (refer to Figure 5) and from the device manager update
the driver of the connected device.
Note: Prefer using the “USB Composite Device” handle for a full recovery.
Figure 5. USB composite device
6.1.2 ST-LINK/V2-1 firmware upgrade
The ST-LINK/V2-1 embeds a firmware upgrade mechanism for in-situ upgrade through the
USB port. As the firmware may evolve during the life time of the ST-LINK/V2-1 product (for
example new functionalities added, bug fixes, support for new microcontroller families), it is
recommended to visit www.st.com before starting to use the STM32 Nucleo-32 board and
periodically, to stay up-to-date with the latest firmware version.
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