Embedded St_Link/V2-1; Drivers; Main Board Power Supply; Power Supply Sources - ST STM32 User Manual

UM2365
5.3

Embedded ST_LINK/V2-1

The ST-LINK/V2-1 programming and debugging tool is integrated into the
STM32L496AGI6-based Discovery main board. Compared to ST-LINK/V2 the changes are
listed in Section
5.3.1

Drivers

The ST-LINK/V2-1 requires a dedicated USB driver, available on
and 8. On Windows XP, the ST-LINK/V2-1 driver requires WinUSB to be installed before
using the ST-LINK/V2-1. It is either available from the Microsoft website or included in the
USB driver for ST-LINK/V2 for XP.
When the STM32L496AGI6-based Discovery main board is connected to the PC before the
driver is installed, some STM32L496AGI6-based Discovery main board interfaces might 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.
5.4

Main board power supply

5.4.1

Power supply sources

The STM32L496AGI6-based Discovery main board can be powered by the following
sources:
•
STLK from the ST-LINK/V2-1 USB connector CN5 with 500 mA current limitation
•
Power mechanism of supplying the board by STLINK/V2-1
•
Programing/debugging when the power supply is not from ST-LINK/V2-1
It is mandatory to power the board first using the user USB FS connector CN8 or the VIN pin
of ARDUINO
to the PC. Proceeding this way ensures that the enumeration succeeds using the external
power source.
5.3.1.

Figure 4. USB Composite Device driver installation.

®
connector CN15 before connecting the USB cable from ST-LINK/V2-1 CN5
UM2365 Rev 3
Hardware layout and configuration
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