6.1 Embedded STLINK-V3E
6.1.1 Description
There are two different ways to program and debug the onboard STM32 MCU:
• Using the embedded STLINK-V3E
• Using an external debug tool connected to CN7 MIPI-10 connector
The STLINK-V3E programming and debugging tool is integrated into the STM32H735G-DK Discovery kit.
The embedded STLINK-V3E supports only SWD and VCP for STM32 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-V3E features.
Features supported in STLINK-V3E:
• 5 V power supplied by the CN15 USB connector
• USB 2.0 high-speed-compatible interface
• JTAG and 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
• Direct firmware update feature (DFU) (CN6)
• STDC14 (MIPI10) compatible connector (CN7)
• LD6 status LED (COM) which blinks during communication with the PC
• LD3 fault red LED (OC) alerting on USB overcurrent request
• 5 V / 500 mA output power supply capability (U23) with current limitation and LED
• LD5 5 V power green LED (5V)
6.1.2 Drivers
Before connecting the STM32H735G-DK board to a Windows
®
PC via USB, the user must install a driver for the
STLINK-V3E (not required for Windows 10
®
). It is available on the www.st.com website.
In case the STM32H735G-DK board is connected to the PC before the driver is installed, some STM32H735G-DK
interfaces may be declared as “Unknown” in the PC device manager. In this case, the user must install the
dedicated driver files, and update the driver of the connected device from the device manager as shown in
Figure 8.
Note: Prefer using the USB Composite Device handle for a full recovery.
Figure 8. USB composite device
Note: 37xx:
• 374E for STLINK-V3E without bridges functions
• 374F for STLINK-V3E with bridges functions
UM2679
Embedded STLINK-V3E
UM2679 - Rev 1
page 10/42
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