Embedded St-Link/V2-1; Drivers; Figure 4. Usb Composite Device - ST STM32091C-EVAL User Manual

Hardware Layout and configuration
2.1

Embedded ST-LINK/V2-1

The ST-LINK/V2-1 programming and debugging tool is integrated on the STM32091C-EVAL
evaluation board. Compared to ST-LINK/V2 the changes are listed below.
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 100mA 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.
Note: It is possible to power the board via CN12 (Embedded ST-LINK/V2-1 USB connector) even
if an external tools is connected to CN10 (High density SWD connector) or CN11 (SWD
connector).
2.1.1

Drivers

The ST-LINK/V2-1 requires a dedicated USB driver, which can be found on
Windows 7 and 8. On Windows XP the ST-LINK/V2-1 driver requires WinUsb to be installed
before using the ST-LINK/V2-1 (either available from Microsoft website or included in the
USB driver for ST-LINK/V2 for XP).
In case the STM32091C-EVAL evaluation board is connected to the PC before the driver is
installed, some STM32091C-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.
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Figure 4. USB Composite Device

DocID026902 Rev 2
UM1817
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