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
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Does anyone know what's the problemCodePudding user response:
Reset the foot part outside to pull up resistors 10 k, figure: principle ofReset foot oscilloscope checked has been 0.09 V level, there is no pulse.
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NRST feet must use a 30-50 k resistor weak pull-up, connect a capacitor and a switch to the ground to resetCodePudding user response:
Hello, pull up, took the 10 k to ground and 104 capacitanceCodePudding user response:
C9 charging is completed, the RESET should be about 3.3 V, the landlord to check the wiring and the RESET circuitCodePudding user response:
Have the board in a board, check whether the reset with what a short feetCodePudding user response:
Hello, replacing the chip is normal,Produced 200 board, there are five operation after a period of time will appear such problems.
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Now wants to find out what is the main reason lead to this phenomenon, software or hardware