Hardware layout and configuration UM2408
16/51 UM2408 Rev 2
To recover from this situation, after installing the dedicated driver, the association of
“Unknown” USB devices found on the STM32H7 Nucleo-144 board to this dedicated driver,
must be updated in the device manager manually.
Note: It is recommended to proceed using a USB composite device, as shown in Figure 7.
Figure 7. USB composite device
Note: 37xx = 374E for STLINK/V3 without bridges functions
374F for STLINK/V3 with bridges functions
STLINK-V3E firmware upgrade
The STLINK-V3E embeds a firmware upgrade mechanism for an in-situ upgrade through
the USB port. As the firmware may evolve during the lifetime of the STLINK-V3E product
(For example new functionalities, bug fixes, support for new microcontroller families), it is
recommended to keep the STLINK-V3E firmware up to date before starting to use the
STM32H7 Nucleo-144 board. The latest version of this firmware is available from the
www.st.com website.
6.3.2 Using an external debug tool to program and debug the onboard
STM32H7
There are 2 basic ways to support an external Debug tool:
1. Keep the embedded STLINK-V3E running.
Power on the STLINK-V3E at first until the COM LED lights RED. Then the user
connects his external debug tool through CN5 MIPI-10 debug connector.
2. Set the embedded STLINK-V3E in high impedance state:
When the user states the jumper JP1 (STLK_RST) ON, the embedded STLINK-V3E is
in RESET state and all GPIOs are in high impedance, then the user can connect his
external debug tool to the debug connector CN5.
Note: Depending on the design requirement, the embedded STLINK-V3E Hardware could be
completely disconnected if that is required early in the project.
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