DocID027351 Rev 3
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UM1855
Hardware layout and configuration
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2.1 ST-LINK/V2-1
ST-LINK/V2-1 facility for debug and flashing of STM32L476ZGT6, is integrated on the
STM32L476G-EVAL evaluation board.
Compared to ST-LINK/V2 stand-alone tool available from STMicroelectronics, ST-LINK/V2-
1 offers new features and drops some others.
New features:
•
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
Features dropped:
•
SWIM interface
The USB connector CN17 can be used to power STM32L476G-EVAL regardless of
ST-LINK/V2-1 facility use for debugging or for flashing STM32L476ZGT6. This holds also
when ST-LINK/V2 stand-alone tool is connected to CN12 or CN15 connector and used for
debugging or flashing STM32L476ZGT6.
Section 2.3
provides more detail on powering
STM32L476G-EVAL.
For full detail on both versions of the debug and flashing tool, the stand-alone ST-LINK/V2
and the embedded ST-LINK/V2-1, refer to
www.st.com
.
2.1.1 Drivers
Before connecting STM32L476G-EVAL to a Windows 7, Windows 8 or Windows XP PC via
USB, a driver for ST-LINK/V2-1 must be installed. It can be downloaded from
www.st.com
.
In case the STM32L476G-EVAL evaluation board is connected to the PC before installing
the driver, the Windows device manager may report some USB devices found on
STM32L476G-EVAL as “Unknown”. To recover from this situation, after installing the
dedicated driver downloaded from
www.st.com
, the association of “Unknown” USB devices
found on STM32L476G-EVAL to this dedicated driver must be updated in the device
manager manually. It is recommended to proceed using USB Composite Device line, as
shown in
Figure 4
.
Figure 4. USB Composite device
