Issue Config Tool Fw update

Hi, I have a custom hardware based on WIZ750SR , this works with official FW version 1.2.4, I built a FW with Keil based on GitHub - Wiznet/WIZ750SR: WIZnet Serial to Ethernet(S2E) module based on W7500 chip, WIZ107/108SR S2E compatible device - tag v1.2.4 . If I update the FW with config tool the device is bricked , If I update with SWD works and next works also with config tool. I think that the issue is related to the APP flash address but I’m not sure. Please can you help me



WIZ750SR FW consists of two parts, application boot(we call it app_boot) and application.
When you download binary with SWD or via ISP communication, you should use the whole binary which includes app_boot and application.
But when you update FW with the configuration tool, you should use the application binary only.
App_boot should be running on WIZ750SR or your own HW to upload new application via the configuration tool.

I guess you uploaded with a wrong binary.