Hardware layout and configuration UM2407
16/49 UM2407 Rev 3
6.3 Embedded STLINK-V3E
There are two different ways to program or debug the on-board STM32H7 MCU:
• Using the embedded STLINK-V3E
• Using an external debug tool connected to the MIPI-10 connector (CN5).
The STLINK-V3E programming and debugging tool is integrated into the STM32H7 Nucleo-
144 board.
The embedded STLINK-V3E supports only SWD and VCP for STM32H7 devices. For
information about debugging and programming features, refer to the technical note
Overview of ST-LINK derivatives (TN1235), which describes in detail all the STLINK/V3
features.
Features supported on STLINK-V3E:
• 5 V power supplied by a USB connector (CN1)
• USB 2.0 high-speed-compatible interface
• JTAG/serial wire debugging (SWD) specific features:
– 3 V to 3.6 V application voltage on the JTAG/SWD interface and 5V tolerant inputs
–JTAG
– SWD and serial viewer (SWV) communication
• STDC14 (MIPI-10) compatible connector (CN5)
• Status COM LED (LD4) which blinks during communication with the PC
• Fault red LED (LD6) alerting on USB overcurrent request
• 5 V/300 mA output power supply capability (U2) with current limitation and LED
• Green LED ON: 5V enabled (LD5)
6.3.1 Drivers
Before connecting the Nucleo-144 board to a Windows
®
PC via USB, a driver for STLINK-
V3E must be installed (not required for Windows
®
10). The toolset supporting ST-LINK
automatically installs the driver. It is also available from the www.st.com website.
In case the STM32H7 Nucleo-144 board is connected to the PC before installing the driver,
the PC device manager might report some Nucleo interfaces as Unknown.
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: ST recommends the use of a USB composite device, as shown in Figure 8.
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