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Hardware Layout and configuration
UM1935
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DocID028194 Rev 1
Figure 4. Updating the list of drivers in device manager
1. Prefer using the “USB Composite Device” handle for a full recovery.
5.1.2
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
recommended to visit
www.st.com
before starting to use the STM32479I-EVAL board and
periodically, in order to stay up-to-date with the latest firmware version.
5.2 Power
Supply
STM32479I-EVAL evaluation board is designed to be powered by 5V DC power supply and
is protected by PolyZen from wrong power plug-in event. It’s possible to configure the
evaluation board to use any of following six sources for the power supply.
5V DC power adapter connected to CN19, the Power Jack on the board (Power Supply
Unit on silk screen of JP14(PSU)).
5V DC power with 300mA limitation from CN22, the USB type B connector of ST-
LINK/V2-1 (USB 5V power source on silkscreen of JP14(STlk)). If the USB
enumeration succeeds (as explained below), the ST-LINK U5V power is enabled, by
asserting the PWR_EN pin. This pin is connected to a power switch (ST890), which
powers the board. This power switch features also a current limitation to protect the PC
in case of short-circuit on board. If over current (more than 600mA) happens on board,
the LED LD11 is lit.
5V DC power with 500mA limitation from CN8, the USB OTG2 HS Micro-AB connector
(USB 5V power source on silkscreen of JP14 (HS)).
5V DC power with 500mA limitation from CN13, the USB OTG1 FS Micro-AB
connector (USB 5V power source on silkscreen of JP14 (FS1)).
5V DC power with 500mA limitation from CN14, the USB OTG2 FS Micro-AB
connector (USB 5V power source on silkscreen of JP14 (FS2)).
5V DC power from CN5 and CN6, the extension connectors for daughterboard
(daughterboard power source on silkscreen of JP14 (D5V)).
STM32479I-EVAL evaluation board can be powered from ST-LINK USB connector CN22
(U5V), but only ST-LINK circuit has the power before USB enumeration, because host PC
only provides 100mA to the board at that time. During the USB enumeration, STM32479I-
EVAL board asks for the 300mA power to the host PC. If the host is able to provide the
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