4514 datasheet(7/210 Pages) RENESAS

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4513/4514 Group User’s Manual

CHAPTER 2 APPLICATION

2.1 I/O pins .................................................................................................................................... 2-2

2.1.1 I/O ports .......................................................................................................................... 2-2

2.1.2 Related registers ............................................................................................................ 2-4

2.1.3 Port application examples ............................................................................................. 2-7

2.1.4 Notes on use .................................................................................................................. 2-9

2.2 Interrupts ............................................................................................................................... 2-11

2.2.1 Interrupt functions ........................................................................................................ 2-11

2.2.2 Related registers .......................................................................................................... 2-13

2.2.3 Interrupt application examples.................................................................................... 2-16

2.2.4 Notes on use ................................................................................................................ 2-25

2.3 Timers .................................................................................................................................... 2-26

2.3.1 Timer functions ............................................................................................................. 2-26

2.3.2 Related registers .......................................................................................................... 2-27

2.3.3 Timer application examples ........................................................................................ 2-30

2.3.4 Notes on use ................................................................................................................ 2-39

2.4 Serial I/O ................................................................................................................................ 2-40

2.4.1 Carrier functions ........................................................................................................... 2-40

2.4.2 Related registers .......................................................................................................... 2-41

2.4.3 Operation description ................................................................................................... 2-42

2.4.4 Serial I/O application example ................................................................................... 2-45

2.4.5 Notes on use ................................................................................................................ 2-48

2.5 A-D converter ....................................................................................................................... 2-49

2.5.1 Related registers .......................................................................................................... 2-50

2.5.2 A-D converter application examples .......................................................................... 2-51

2.5.3 Notes on use ................................................................................................................ 2-52

2.6 Voltage comparator ............................................................................................................. 2-54

2.6.1 Voltage comparator function ....................................................................................... 2-54

2.6.2 Related registers .......................................................................................................... 2-54

2.6.3 Notes on use ................................................................................................................ 2-55

2.7 Reset ....................................................................................................................................... 2-56

2.7.1 Reset circuit .................................................................................................................. 2-56

2.7.2 Internal state at reset .................................................................................................. 2-57

2.8 Voltage drop detection circuit.......................................................................................... 2-58

2.9 RAM back-up ........................................................................................................................ 2-59

2.9.1 RAM back-up mode ..................................................................................................... 2-59

2.9.2 Related register ............................................................................................................ 2-60

2.9.3 Notes on use ................................................................................................................ 2-62

2.10 Oscillation circuit .............................................................................................................. 2-63

2.10.1 Oscillation circuit ........................................................................................................ 2-63

2.10.2 Oscillation operation .................................................................................................. 2-64

2.10.3 Notes on use .............................................................................................................. 2-64

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