NXP Semiconductors
KW45B41Z-EVKUM
KW45B41Z-EVK Board User Manual
Debug scenario Feature support
– Connect the external debugger to the target MCU SWD connector
J16. The target MCU SWD interface is connected to the external
debugger.
• VCOM: MCU-Link VCOM feature can be used
• USBSIO: MCU-Link USBSIO feature can be used
• Target selection: Target selection jumper JP26 is open
• Target power selection: Target power selection jumper JP28 is set to
1-2 shorted
Use MCU-Link as debugger for an external
target MCU
• SWD:
– MCU-Link SWD feature is enabled (MCU-Link SWD disable jumper
JP22 is open)
– Connect the external target MCU to the target MCU SWD connector
J16
• VCOM: MCU-Link VCOM feature is not supported
• USBSIO: MCU-Link USBSIO feature is not supported
• Target selection: Short target selection jumper JP26
• Target power selection:
– If the external target MCU has to get power from the board, then set
target power selection jumper JP28 to 1-2 shorted
– If the external target MCU has to use its own power, then set jumper
JP28 to 2-3 shorted
Table 21. Supported debug scenarios...continued
3.6 Connecting to a target through a USB-to-UART bridge
MCU-Link supports the VCOM serial port feature, which adds a serial COM port on the host computer, and
connects it to the target MCU by using MCU-Link as a USB-to-UART bridge.
In the KW45B41Z-EVK board, MCU-Link is connected to the LPUART1 port of the target MCU through a
voltage translator U23. The voltage translator enables communication between MCU-Link and the target MCU,
by shifting voltage levels of signals between the two devices from 3.3 V to VCC_TGMCU and vice versa.
To use MCU-Link as a USB-to-UART bridge, verify the following jumper settings and connect the J14 connector
on the board to the USB port of the host computer:
• Jumper JP20 is open (MCU-Link is in Normal mode)
• Jumper JP21 is open (USB-to-UART bridge is enabled)
When you boot the KW45B41Z-EVK board, a VCOM port with the name MCU-Link Vcom Port (COMxx) is
enumerated on the host computer, where “xx” may vary from one computer to another. Each MCU-Link based
board has a unique VCOM number associated with it.
The USB-to-UART bridge (VCOM feature) can be disabled by disabling voltage translator U23 (setting it to high-
impedance). To disable U23, unpower the KW45B41Z-EVK board and short jumper JP21. Shorting/opening
JP21 after powering up the board has no impact on the functions/features of the MCU-Link firmware.
3.7 Connecting to a target through a USB-to-SPI or USB-to-I2C bridge
MCU-Link supports the USB serial input/output (USBSIO) port feature, which adds a USB serial I/O port on the
host computer, and connects it to the target MCU by using MCU-Link as a USB-to-SPI bridge or USB-to-I2C
bridge. Support for the USBSIO feature can be enabled on the host computer using the libusbsio library, which
is a free host library from NXP for Windows/Linux/MacOS systems. For more details on the libusbsio library, see
https://www.nxp.com/libusbsio.
KW45B41Z-EVKUM All information provided in this document is subject to legal disclaimers. © 2023 NXP B.V. All rights reserved.
User manual Rev. 2 — 13 February 2023
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