NXP Semiconductors
UM11192
User Manual for LPCXpresso54S018M Development Board
UM11192
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2019. All rights reserved.
User manual
Rev. 1.0
— 13th February 2019
17 of 34
Note: The Link2 only boots when the board is power cycled; the reset button on the
board does not reset the Link2.
When using MCUXpresso IDE, the Link2 can be automatically booted with the latest /
most appropriate firmware for that IDE version by installing JP5 before powering up the
board. This is the recommended approach for the MCUXpresso IDE. Note that if JP5 is
installed the VCOM port (and other devices mentioned above) device will not appear until
the IDE boots the Debug Probe. The Debug Probe is booted once a debug session is
started (that is, the IDE attempts to download code to the target).
5.1 What the Link2 boot LED indicates
LED D10 is the Link2 MCU BOOT0_LED indicator. This LED reflects the state of Link2
MCU pin P1_1. When the boot process fails, D1 will toggle at a 1 Hz rate for 60
seconds. After 60 seconds, the Link2 MCU is reset.
5.2 Programming the Link2 firmware
As mentioned earlier in this section, it is not normally necessary to program the Link2
firmware. However, this can easily be accomplished using the supporting utility,
LPCScrypt.
To program the Link2 Flash the Link2 device (LPC432x) must be in DFU mode. If the
Link2 already has a valid image in the flash, it will need to be forced into DFU mode by
placing a jumper on JP5, and power cycling (disconnecting then reconnecting power via
J8.) Link2 MCU programming is performed using the LPCScrypt utility (see
http://www.nxp.com/lpcutilities
). After installing the utility, run either of the Program LPC-
Link2 with CMSIS-DAP or Program LPC-Link2 with Segger J-link utilities to program the
firmware, and follow the on-screen instructions. Further instructions for using the tool are
located on the utility web page.
5.3 VCOM port
The identifier of the VCOM port will vary between boards and hosts. To determine the
COM port, open the Windows operating system Device Manager. This can be achieved
by going to
the Windows operating system Start menu and typing “Device Manager” in
the search bar
. In the device manager look under “Ports”; the LPC-LinkII UCom Port
device and its name should be visible. NOTE: this VCOM port will only appear if (a) the
Debug Probe has been programmed with the CMSIS-DAP firmware and the Debug
Probe DFU link is removed at power up, or (b) if the Debug Probe has been configured
for DFU boot (JP5 installed) at power up and MCUXpresso IDE has booted it (by starting
a debug session.)