4507_M Datasheet, PDF (6/216 Pages) Renesas Technology Corp – 4-BIT CISC SINGLE-CHIP MICROCOMPUTER 4500 SERIES

4507 Group
Table of contents
CHAPTER 2 APPLICATION
2.1 I/O pins .................................................................................................................................... 2-2
2.1.1 I/O ports .......................................................................................................................... 2-2
2.1.2 Related registers ............................................................................................................ 2-6
2.1.3 Port application examples ........................................................................................... 2-10
2.1.4 Notes on use ................................................................................................................ 2-11
2.2 Interrupts ............................................................................................................................... 2-13
2.2.1 Interrupt functions ........................................................................................................ 2-13
2.2.2 Related registers .......................................................................................................... 2-14
2.2.3 Interrupt application examples .................................................................................... 2-17
2.2.4 Notes on use ................................................................................................................ 2-21
2.3 Timers .................................................................................................................................... 2-22
2.3.1 Timer functions ............................................................................................................. 2-22
2.3.2 Related registers .......................................................................................................... 2-23
2.3.3 Timer application examples ........................................................................................ 2-25
2.3.4 Notes on use ................................................................................................................ 2-32
2.4 A/D converter ....................................................................................................................... 2-34
2.4.1 Related registers .......................................................................................................... 2-35
2.4.2 A/D converter application examples .......................................................................... 2-35
2.4.3 Notes on use ................................................................................................................ 2-37
2.5 Reset ....................................................................................................................................... 2-39
2.5.1 Reset circuit .................................................................................................................. 2-39
2.5.2 Internal state at reset .................................................................................................. 2-40
2.5.3 Notes on use ................................................................................................................ 2-40
2.6 RAM back-up ........................................................................................................................ 2-41
2.6.1 RAM back-up mode ..................................................................................................... 2-41
2.6.2 Related registers .......................................................................................................... 2-43
2.6.3 Notes on use ................................................................................................................ 2-47
2.7 Oscillation circuit ................................................................................................................ 2-48
2.7.1 Oscillation circuit .......................................................................................................... 2-48
2.7.2 Oscillation operation .................................................................................................... 2-50
2.7.3 Notes on use ................................................................................................................ 2-51
Rev.2.01 Feb 04, 2005
ii
REJ09B0195-0201