Hardware Configuration; Ethernet Configuration; Vbat Configuration; Stlink-V3E Configuration - ST STM32MP135F-DK User Manual

7.2

Hardware configuration

7.2.1

Ethernet configuration

The board embeds dual 10/100 MBit/s Ethernet ports, Ethernet 1 and Ethernet 2, with one featuring Wake on LAN
(WoL).
The WoL feature is configured by default and is only available for the Ethernet 1 port. The Ethernet reference
clock must be taken from the crystal X3 and the resistor R107 must be OFF.
If the WoL feature is not needed, the reference clock can be directly taken from the MPU pin PA11 by having
resistor R107 ON, and resistors R105 and R106 OFF.
7.2.2

VBAT configuration

The VBAT feature is available to maintain critical operations when a power loss occurs on VDD. In the default
configuration with the resistor R192 ON and the resistor R191 OFF, theVBAT feature is not available.
To enable the VBAT mode, swap the resistors R192 and R191, and connect a backup power source to the VBAT
connector.
7.2.3

STLINK-V3E configuration

The embedded STLINK-V3, STLINK-V3E, proposes only the SWD interface.
Restriction: The STLINK_JTDI signal is shared with the μSD_DETECT signal. It is reserved for internal use only.
7.3

Embedded STLINK-V3E

7.3.1

Description

To debug the on-board STM32 MPU, the STLINK-V3E programming and debugging tool is integrated in the
STM32MP135F-DK Discovery kit. The embedded STLINK-V3E supports only SWD and VCP for STM32 devices.
For information about the debugging and programming features of STLINK-V3E, refer to the ST-LINK in-circuit
debugger/programmer for STM8 and STM32 user manual (UM1075) and Overview of ST-LINK derivatives
technical note (TN1235).
It is recommended to power the board (CN12, 5 V power in connector, PWR_IN) before plugging the USB debug
cable to the Micro-B connector.
7.3.2

Drivers

Before connecting STM32MP135F-DK to a Windows
be installed (not required for Windows
In cases where the STM32MP135F-DK Discovery kit is connected to the PC before the driver is installed, some
STM32MP135F-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.
7.3.3

STLINK-V3 firmware upgrade

The STLINK-V3 embeds a firmware upgrade mechanism for in place upgrade through the USB port. As firmware
may evolve during the lifetime of the STLINK-V3 product (addition of new functionalities, bug fixes, or support
of new microprocessor families), visiting the
STM32MP135F-DK Discovery kit, then periodically to stay up-to-date with the latest firmware version.
7.3.4

Using the STLINK-V3 to program and debug the on-board STM32

To program the on-board STM32, no specific hardware configuration is required.
UM2993 - Rev 2
®
(7, 8, or 10) PC via the USB, a driver for STLINK-V3 must
®
10). It is available from the
www.st.com website is recommended before starting to use the
Hardware configuration
www.st.com website.
UM2993
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