I got a development board with a SOP20 MCU on it. The manufacturer model has been polished. It can be measured that Pin5 is GND and Pin16 is VCC. Can you guess which MCU it is? It would be even better
With the continuous development of electronic components, components with bottom solder terminals are becoming more and more popular. DRQFN and MQFN are two typical components with bottom solder termi
In the previous two articles, whether using GPIO or interrupts, the application obtains the key value by loop reading, which will cause a high CPU usage. This article first introduces several I/O mode