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The interrupt INT pin of 8259A is connected to the INTR input of the 8085 microprocessor. INTA output of the processor is connected to the INTA input. When S̅P̅ / E̅N̅ pin is high, only one IC is used in the microprocessor-based system. If more than one ICs are connected ...
Interrupt: A more desirable method would be the one that allows the microprocessor to be executing its main program and only stop to service I/O devices when it is told to do so by the device itself. In effect, the method, would provide an external asynchronous input that would inform the...
Transmission Type LCDs Used in portable computers A strong fluorescent backlight is passed through LCD elements & some filters to produce desired displays. Color of pixel is determined by a triad consisting of red, green and blue elements. Disadvantages- High cost Large amount of power used by b...