4524_M Datasheet, PDF (6/310 Pages) Renesas Technology Corp – 4-BIT CISC SINGLE-CHIP MICROCOMPUTER 720 FAMILY / 4500 SERIES

4524 Group
Table of contents
CHAPTER 2 APPLICATION
2.1 I/O pins ....................................................................................................................................... 2
2.1.1 I/O ports ............................................................................................................................. 2
2.1.2 Related registers ............................................................................................................... 5
2.1.3 Port application examples .............................................................................................. 13
2.1.4 Notes on use ................................................................................................................... 14
2.2 Interrupts .................................................................................................................................. 16
2.2.1 Interrupt functions ........................................................................................................... 16
2.2.2 Related registers ............................................................................................................. 19
2.2.3 Interrupt application examples ....................................................................................... 22
2.2.4 Notes on use ................................................................................................................... 32
2.3 Timers ....................................................................................................................................... 33
2.3.1 Timer functions ................................................................................................................ 33
2.3.2 Related registers ............................................................................................................. 34
2.3.3 Timer application examples ........................................................................................... 39
2.3.4 Notes on use ................................................................................................................... 49
2.4 A/D converter .......................................................................................................................... 50
2.4.1 Related registers ............................................................................................................. 51
2.4.2 A/D converter application examples ............................................................................. 52
2.4.3 Notes on use ................................................................................................................... 54
2.5 Serial I/O ................................................................................................................................... 56
2.5.1 Carrier functions .............................................................................................................. 56
2.5.2 Related registers ............................................................................................................. 57
2.5.3 Operation description ...................................................................................................... 59
2.5.4 Serial I/O application example ...................................................................................... 62
2.5.5 Notes on use ................................................................................................................... 65
2.6 LCD function ............................................................................................................................ 66
2.6.1 Operation description ...................................................................................................... 66
2.6.2 Related registers ............................................................................................................. 67
2.6.3 LCD application examples ............................................................................................. 69
2.6.4 Notes on use ................................................................................................................... 71
2.7 Reset .......................................................................................................................................... 72
2.7.1 Reset circuit ..................................................................................................................... 72
2.7.2 Internal state at reset ..................................................................................................... 73
2.7.3 Notes on use ................................................................................................................... 74
2.8 Voltage drop detection circuit ............................................................................................. 75
2.8.1 Note on use ..................................................................................................................... 76
2.9 Power down ............................................................................................................................. 77
2.9.1 Power down mode .......................................................................................................... 78
2.9.2 Related registers ............................................................................................................. 81
2.9.3 Power down function application example .................................................................. 85
2.9.4 Notes on use ................................................................................................................... 86
2.10 Oscillation circuit ................................................................................................................. 87
2.10.1 Oscillation circuit ........................................................................................................... 87
2.10.2 Oscillation operation ..................................................................................................... 89
2.10.3 Related register ............................................................................................................. 90
2.10.4 Notes on use ................................................................................................................. 90
Rev.2.00 Aug, 06 2004
ii
REJ09B0107-0200Z