1、037 Chip SDK will set LVR after selecting high frequency in macro definition. When the power supply of VDD is insufficient, LVR will be continuously triggered to enter the low voltage reset. The LVR configuration can be temporarily shielded or the supply voltage can be increased.
1. Check whether the 80C51FA model under the NXP Device is selected.
2. Whether the two download ports P3.0 and P0.2 are reused in the program? If they are reused, the correct program can be downloaded again after erasing the program.
The company focuses on the development of MCU and IOT products, mainly for life applications (including: home appliance control, panel display, smart home control); Industrial applications (including frequency conversion control, motor control); And precision measurement applications (battery inspection and measurement, human body detection) and other applications.
1. Using PWLINK2-ARM online debugger, you can erase Flash data and restore SWD function.
2，Using Xuan micro burner can directly overwrite the original FLASH, restore SWD function.
1. If the output end of other analog modules and the input end of ADC are on the same analog channel of GPIO, they are directly connected. At this time, the analog signal does not pass through GPIO, so GPIO can be used for input/output and digital multiplexing functions without analog multiplexing.
2，If the output end of other analog modules and the input end of ADC, on different analog channels of GPIO, belong to the loop. At this time, GPIO must open two analog channels. GPIO is occupied and cannot be used for digital multiplexing function.