The peripheral device needs to communicate with the microcontroller through IIC. The peripheral device has two pins, SCL and SDA. Can they be connected to any I/O port of the microcontroller or can th
I use mc39i modem, and I found that pin 31/pd always fluctuates between 0.24v and 2.24v. When this pin is 0v, the modem is powered off. I isolated the control end of this pin with 6n137, input 1 to po
1. Special diodes1. Fast recovery diode (FRD)----The reverse recovery time of the fast recovery diode is generally a few hundred nanoseconds, the forward voltage drop is 0.6V~1V, the forward current i