UPD61P34BGS View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD61P34BGS

Infrared remote control transmitter 4-bit single-chip microcontroller

NEC => Renesas Technology 

CONTENTS

PART 1 GENERAL ................................................................................................................... 1

CHAPTER 1 FUNDAMENTALS OF INFRARED REMOTE CONTROL .................................................... 3

CHAPTER 2 OVERVIEW OF REMOTE CONTROL TRANSMISSION PROGRAM .................................. 5

2.1 General Flow Chart .......................................................................................................... 5

2.2 Overview of Processing .................................................................................................. 5

2.2.1 Initialization processing ..................................................................................................... 5

2.2.2 STOP mode ........................................................................................................................... 5

2.2.3 Key input processing .......................................................................................................... 6

2.2.4 Transmission processing ................................................................................................... 6

PART 2 48-KEY PROGRAM ................................................................................................... 7

CHAPTER 1 HARDWARE CONFIGURATION .......................................................................................... 9

1.1 Application Circuit Example .......................................................................................... 9

1.2 Key Matrix ....................................................................................................................... 10

CHAPTER 2 TRANSMISSION WAVEFORM ........................................................................................... 11

2.1 NEC-R Format ................................................................................................................. 11

CHAPTER 3 TIMING CHARTS ................................................................................................................ 13

3.1 Timing Charts for Key Input to REM Output ............................................................. 13

3.1.1 Timing when a key is pressed and held ........................................................................ 13

3.1.2 Timing during key OFF status ......................................................................................... 14

3.2 Timing Charts of Key Operations ............................................................................... 17

3.2.1 Output patterns prior to key confirmation .................................................................... 17

3.2.2 Operation of combination key ......................................................................................... 23

3.2.3 Key transfer operation ...................................................................................................... 25

CHAPTER 4 OUTPUT CODES ................................................................................................................ 27

CHAPTER 5 SOFTWARE CONFIGURATION ......................................................................................... 29

5.1 General Flow Chart ........................................................................................................ 29

5.2 Program Memory (ROM) Configuration ..................................................................... 30

5.3 Data Memory (RAM) Configuration ............................................................................. 32

5.4 Flag Maps ........................................................................................................................ 37

CHAPTER 6 PROGRAM DESCRIPTION ................................................................................................ 39

6.1 Initial Settings ................................................................................................................. 39

6.1.1 Description of processing ................................................................................................ 39

6.1.2 Detailed flow chart ............................................................................................................. 43

6.2 Key Input Processing .................................................................................................... 45

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