1. Parallel Interfacing Chapter 7

2. Parallel Interfacing Parallel I/O Ports Using Parallel Ports Seven-Segment Displays Keypad Interfacing Liquid Crystal Displays Interrupt-Driven Traffic Lights

4. Port and Data Direction Registers

8. MC68HC711E9

9. PORTA

12. Parallel Interfacing Parallel I/O Ports Using Parallel Ports Seven-Segment Displays Keypad Interfacing Liquid Crystal Displays Interrupt-Driven Traffic Lights

13. Turning on an LED

16. Using an AC Relay

17. Interfacing a switch input HEX F0 DDRH C! : ?open ( -- f ) 2 PORTH ?HI ;

18. Parallel Interfacing Parallel I/O Ports Using Parallel Ports Seven-Segment Displays Keypad Interfacing Liquid Crystal Displays Interrupt-Driven Traffic Lights

19. Common Anode 7-Segment Display

20. Interfacing a 7-Segment Display

22. Common-Cathode Displays The MC14495-1 2 digits: PORTH: 0 0 LE1 LE0 D C B A 7 6 5 4 3 2 1 0

23. Parallel Interfacing Parallel I/O Ports Using Parallel Ports Seven-Segment Displays Keypad Interfacing Liquid Crystal Displays Interrupt-Driven Traffic Lights

24. 4 x 4 Hex Keypad

25. Registers associated with parallel I/O on Port J

26. Scanning a 4 x 4 keypad

27. :keypad ( -- n ) BEGIN ?keypad UNTIL ;

28. Axiom Keypad

29. * 0#D 789 4 C 56B 123A PH0 PH1 PH2 PH3 PH4 PH5 PH6 PH7 Col 1234Row 4 3 2 1 1K Axiom 4 x 4 Hex Keypad

32. Debounce

35. :keypad ( -- n ) BEGIN ?keypad UNTIL ; :wait.for.keyup ( -- ) BEGIN ?keypad WHILE DROP REPEAT ; :main.keypad ( -- ) init.key BEGIN keypad.led wait.for.keyup AGAIN ; Displaying keys pressed on a 7-segment display

36. Including debounce when reading a keypad

37. The 74C922 16-Key Encoder

38. Reading a keypad using the 74C922 16-Key Encoder

39. Interfacing a 16 x 1 hex keypad to a 68HC711E9 using a 74154

40. Scanning a 16 x 1 keypad

41. Parallel Interfacing Parallel I/O Ports Using Parallel Ports Seven-Segment Displays Keypad Interfacing Liquid Crystal Displays Interrupt-Driven Traffic Lights

42. Liquid Crystal Display

43. Relationship between RS, R/W, and E

49. Axiom LCD

54. Parallel Interfacing Parallel I/O Ports Using Parallel Ports Seven-Segment Displays Keypad Interfacing Liquid Crystal Displays Interrupt-Driven Traffic Lights

57. Traffic Lights Using Real-time Interrupt