Download contents mismatch at: 0000021bh (flash = DFH required = FFH) for JTAG )! Error

Recently, we are working on a project using the lpc1765,ProgramIt consists of two parts: bootloader, which completes the system configuration, and the work app, which runs when the system configuration is complete or no configuration is required to control the related logic.

When JTAG is configured, erase sector is not checked, which leads to a successful download, but an error occurred in online debugging. The error description is as follows:

Contents mismatch at: 0000021bh (flash = DFH required = FFH )!

To solve this problem, simply press and select erase sector.