Dear experts, I use arm9 chip, and finally found that the IO port is not enough. I want to expand the standard IO port from the data port and address port. What should I do? ? Please give me some advi...
The picture shows the circuit of the mobile phone audio driving the infrared emitting tube. The input is the mobile phone audio, and the voltage is about 0.1v. How is the infrared tube driven? Wouldn'...
[i=s]This post was last edited by PCB Training on 2015-6-14 16:31[/i] [font=Arial][color=#0000ff][b][size=3]Lund Quan[/size][/b] [size=3]Senior Application Engineer Motorola Microcontroller Division H...
Why can't the thyristor in this circuit be turned on? I used an oscilloscope to measure the signal from the 13th pin of the microcontroller. The trigger voltage is 1V and the trigger pulse width is 40...
#define uchar unsigned char //Define it for ease of use #define uint unsigned int #define ulong unsigned long #include reg52.h //Includes a header file for the 52 standard kernel
sbit K0=P1^0; /*R cha...
Abstract:
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