Hi,
According to your statement, I'd like to suggest that two approach to program the LPC devices.
1. Using the debugger, such as J-link, U-link, etc. and the debug interface supports the SWD and JTAG.
2. Using the ISP mode to program the MCU, you can choose the UART TTL Serial cable to connect the MCU to the PC and you should go to the Flash Magic - Welcome follow the instructions of the Flash Magic tool.
Have a great day,
Ping
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