7470 datasheet(8/354 Pages) RENESAS

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7470 Folha de dados(PDF) 8 Page - Renesas Technology Corp

Nome de Peças	7470

Descrição Electrónicos	8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES

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Fabricante Electrônico	RENESAS [Renesas Technology Corp]

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7470/7471/7477/7478 GROUP USER’S MANUAL

Table of contents

iii

CHAPTER 2. APPLICATION

2.1

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

2.1.1 I/O port ........................................................................................................................... 2-2

2.1.2 Notes on use ................................................................................................................. 2-5

2.2

Interrupts ................................................................................................................................. 2-7

2.2.1 Memory allocation ......................................................................................................... 2-7

2.2.2 Processor status register (PS) .................................................................................... 2-8

2.2.3 Application example ...................................................................................................... 2-9

2.2.4 Notes on use ................................................................................................................. 2-9

2.3

Timers ..................................................................................................................................... 2-10

2.3.1 Memory allocation ....................................................................................................... 2-10

2.3.2 Application example .................................................................................................... 2-11

2.3.3 Notes on use ............................................................................................................... 2-22

2.4

Serial I/O ................................................................................................................................ 2-23

2.4.1 7470/7471 group memory allocation ....................................................................... 2-23

2.4.2 Application example .................................................................................................... 2-24

2.4.3 7477/7478 group memory allocation ....................................................................... 2-29

2.4.4 Application examples .................................................................................................. 2-30

2.4.5 Notes on use ............................................................................................................... 2-34

2.5

A-D converter ....................................................................................................................... 2-35

2.5.1 Memory allocation ....................................................................................................... 2-35

2.5.2 Application examples .................................................................................................. 2-36

2.5.3 Notes on use ............................................................................................................... 2-38

2.6

Reset ....................................................................................................................................... 2-39

2.6.1 Reset circuit ................................................................................................................. 2-39

2.6.2 Notes on use ............................................................................................................... 2-39

2.7

Oscillation circuit ................................................................................................................ 2-40

2.8

Low-power dissipation function ....................................................................................... 2-41

2.8.1 CPU mode register ..................................................................................................... 2-41

2.8.2 Application examples .................................................................................................. 2-42

2.8.3 Notes on use ............................................................................................................... 2-47

2.9

Countermeasures against noise ...................................................................................... 2-48

2.9.1 Shortest wiring length ................................................................................................. 2-48

2.9.2 Connection of a bypass capacitor across the VSS line and the VCC line ......... 2-51

2.9.3 Wiring to analog input pins ........................................................................................ 2-51

2.9.4 Consideration for oscillator ........................................................................................ 2-52

2.9.5 Setup for I/O ports ...................................................................................................... 2-53

2.9.6 Providing of watchdog timer function by software ................................................ 2-54

2.10 Notes on programming ...................................................................................................... 2-56

2.10.1 Processor status register ......................................................................................... 2-56

2.10.2 Decimal calculations ................................................................................................. 2-57

2.11 Differences between 7470/7471 group and 7477/7478 group .................................. 2-58

Nº de peça semelhante - 7470

Fabricante Electrônico	Nome de Peças	Folha de dados	Descrição Electrónicos
Renesas Technology Corp	7470	678Kb / 47P	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Renesas Technology Corp	7470	4Mb / 361P	8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES
Molex Electronics Ltd.	74703-0007	257Kb / 5P	1.27mm (.050) Pitch HSSDC2 Receptacle, Shielded, Right Angle, Single Row, 7 Circuits
	74703-0017	257Kb / 5P	1.27mm (.050) Pitch HSSDC2 Receptacle, Shielded, Right Angle, Single Row, 7 Circuits
	74703-0107	257Kb / 5P	1.27mm (.050") Pitch HSSDC2 Receptacle, Shielded, Right Angle, Single Row, 7 Circuits

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