STM32F103RET6 reset after power on the foot of 0.09 V voltage, chip has been in a reset state,
After access JLINK bright red light, if the reset foot force after 3.3 V, the software run normally, the simulator can normal recognition to the ID, but cannot update FLASH and simulation

CodePudding user response:

Does anyone know what's the problem

CodePudding user response:

Reset the foot part outside to pull up resistors 10 k, figure: principle of
Reset foot oscilloscope checked has been 0.09 V level, there is no pulse.

CodePudding user response:

NRST feet must use a 30-50 k resistor weak pull-up, connect a capacitor and a switch to the ground to reset

CodePudding user response:

Hello, pull up, took the 10 k to ground and 104 capacitance

CodePudding user response:

C9 charging is completed, the RESET should be about 3.3 V, the landlord to check the wiring and the RESET circuit

CodePudding user response:

Have the board in a board, check whether the reset with what a short feet

CodePudding user response:

Hello, replacing the chip is normal,
Produced 200 board, there are five operation after a period of time will appear such problems.

CodePudding user response:

Now wants to find out what is the main reason lead to this phenomenon, software or hardware