Lesson Archives

  1. Input & Output Interface, Interface with 8259A, PIN Diagram 8259, B8259A Block Diagram, Cascaded 8259A, Addressing 8259A, INITIALIZATION COMMAND WORDS (ICWS) ICW 1, ICW 2, ICW 3, & IC4 , Operation Command Words (OCWs), OCW 1, OCW 2 & ICW 3 Programming 8259. WAP 8259 Solved Examples 8259
  2. Pin diagram of 8253/8254, Control word Format, Programming the Counters, Reading the Counters, Read-Back Command, Counter Latch, Modes of Operation, Mode 0 –Interrupt on Terminal count, Mode 1 Hardware re-triggerable one-shot, Mode 2 Rate Generator (Divide by N counter) Mode 3 Square Wave Generator, Mode 4 Software triggered strobe, Mode 5 Hardware triggered strobe, Reading […]
  3. Features of 8253/8254, Pin diagram of 8253/8254, Memory mapping, Control word Format, Programming the Counters, Reading the Counters, Read-Back Command, Counter Latch, Modes of Operation, Modes of counting, Mode 0 –Interrupt on Terminal count, Mode 1 Hardware re-triggerable one-shot
  4. IO-Mapped & Memory-Mapped ,  Modes of I/O Instructions, Isolated I/O Direct I/O Indirect I/O String IN and OUT, I/O Design in 8086, Switch Interface LED Interface, Simple Output Port using 74373 Latch ,  Simple Input Port using 74245 Trans-receive  Tristate Buffer, Key Debouncing Circuits