* This section is intended for developers who want to customize to an extended product based on the WIZ750SR hardware or software.
The full firmware source code of the WIZ750SR product is available at the GitHub repository, and it uses the Apache License 2.0, anyone can freely modify(called 'customize') and distribute it without restriction. These documents describe how to restore the product through the firmware update if the product does not work during the user's customization.
If the user wants to customize the application area only and keep using the configuration tool functions of the WIZ750SR product(Device Search / Setting / Update and Etc.), Users can use the 'Network Firmware Update' function of the configuration tool to update the modified application to the WIZ750SR and check if it works well. At this time, if there is a problem in the operation of the customized application firmware and the search function does not work, AppBoot mode can be used for search and recovery the device.
If you want to customize the entire firmware while maintaining the WIZ750SR's hardware, you can update the full binary directly to the code flash memory by using the W7500x ISP Tool(WIZISP) of the W7500 / W7500P chip using a serial port. The WIZ750SR-EVB is equipped with a switch(BOOT) for accessing the MCU boot mode. It can perform ISP (In-System Programming) operation through Debug UART (Micro USB connector) located on the EVB side.