Currently, I was testing LPC55S16- EVK
In order to test using UART ISP mode.
I download the Flash Magic tool from: https://www.flashmagictool.com/ the latest version Flash Magic v13.2.
But it can not work.
Hi
Please refer this article.
https://community.nxp.com/t5/LPC-Microcontrollers-Knowledge/Flash-Magic-Programing-LPC/ta-p/1152763
It includes how to program lpc55s69 using UART.
Have a nice day,
Jun Zhang