Drivers; St-Link/V2-1 Firmware Upgrade; Figure 4. Usb Composite Device - ST STM32L073Z-EVAL User Manual

Hardware layout and configuration
The new features supported on ST-LINK/V2-1 are:
•
USB software re-enumeration
•
Virtual com port interface on USB
•
Mass storage interface on USB
•
USB power management request for more than 100 mA power on USB
This feature is no more supported on ST-LINK/V2-1:
•
SWIM interface
For all general information concerning debugging and programming features common
between V2 and V2-1 refer to ST-LINK/V2 User Manual UM1075.
Known limitation:
Activating the readout protection on ST-LINK/V2-1 target, prevents the target application
from running afterwards. The target readout protection must be kept disabled on ST-
LINK/V2-1 boards.
Note: It is possible to power the board via CN17 (Embedded ST-LINK/V2-1 USB connector) even
if an external tool is connected to connectors CN11 or CN12.
7.1.1

Drivers

The ST-LINK/V2-1 requires a dedicated USB driver, which can be found on
Windows
In case the STM32L073Z-EVAL evaluation board is connected to the PC before the driver is
installed, some STM32L073Z-EVAL interfaces may be declared as "Unknown" in the PC
device manager. In this case the user must install the driver files, and update the driver of
the connected device from the device manager.
Note: Prefer using the "USB Composite Device" handle for a full recovery.
7.1.2

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 functionality, bug fixes, support for new microcontroller families), it is
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®
XP, 7, 8.

Figure 4. USB Composite device

UM1878 Rev 2
UM1878
www.st.com for