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STM32F105RBT6 is not able to flash after flashing the USB host-related program.

AnupB
Associate II

-> I have developed the STM32F105RBT6 development board, when I had flashed the USB host-related program into it using STLink, the program is flashed into it, but shows verification failed. After that, I had retry to flash the ic but ic is not detected by ST-Link Utility 

-> Also I will try to flash the ic using UART but the same issue

Now how to solve these issues, is there any basic configuration I am missing. ? please help me.

Connection for ST-Link :

uC connection

PIN46(PA13) - SWDIO

PIN49(PA14) - SWCLK

PIN7 (NRST) - 10K->3V3

PIN60(BOOT0) - 10K -> GND

Connection for UART :

uC connection

PIN42(PA9) - RX (of USB to TTL)

PIN43(PA10) - TX (of USB to TTL)

PIN7 (NRST) - 10K->3V3

PIN60(BOOT0) - 10K -> 3V3

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