8255 uses 64 input expansion interface circuit


Posted on Dec 11, 2010

Computer control system, you can detect the signal path switching means dressing a lot, you need a lot of input interface expansion Wei, so can all switch signal input into the


8255 uses 64 input expansion interface circuit
Click here to download the full size of the above Circuit.

computer. When using a programmable chip 8255 expansion input interface, there are 8255 per piece 3 1/0, pass through the program in its entirety is initialized to enter work, you can enter up to 24 digital signals, therefore, according to the switching signal input large ones it can calculate the required number of 8255 chips. Figure 27-29 shows using 8255 expansion interface circuit 64 inputs.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Interfacing PC keyboard to AVR microcontroller
High Voltage AC Calibrator Circuit Using Op Amp
Simple Power Supply Circuit easy to make Schematic Diagram
avr How to redesign a circuit to use a current sinking IC rather than a current sourcing IC
ADum3223 issue (H bridge)
1w fm booster based 2n4427
Line level to phono input
5 Minute Digital Clock
Bus Description RS644 LVDS
Doorbell Cascade



Top