UPD61P34BGS Ver la hoja de datos (PDF) - NEC => Renesas Technology

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UPD61P34BGS

Infrared remote control transmitter 4-bit single-chip microcontroller

NEC => Renesas Technology 

LIST OF FIGURES (1/2)

Figure No.

Title

Page

PART 1 GENERAL

1-1

Configuration of IR Remote Control Unit ............................................................................................. 3

1-2

Example of NEC-format Transmit Waveform ....................................................................................... 4

PART 2 48-KEY PROGRAM

1-1

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

1-2

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

2-1

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

3-1

Timing Chart when Key is Pressed and Held .................................................................................... 14

3-2

Timing Chart for Key OFF Status ....................................................................................................... 15

3-3

Output Patterns Prior to Key Confirmation ........................................................................................ 18

3-4

Timing Chart of Key Combination Operation ..................................................................................... 23

3-5

Operation Timing of Key Transfer Operation ..................................................................................... 25

5-1

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

5-2

ROM Map ............................................................................................................................................ 30

5-3

Data Table Map ................................................................................................................................... 31

6-1

6-2

6-3

6-4

6-5

6-6

6-7

6-8

6-9

6-10

6-11

6-12

Chattering of Key Input Signal ........................................................................................................... 45

Key ON Judgment when Chattering Occurs ...................................................................................... 46

48-key Key Matrix ............................................................................................................................... 47

Key Matrix ............................................................................................................................................ 48

Key Data (Key Position) ..................................................................................................................... 48

Bit Configuration of Key Data when Input is via KI0 to KI3 ................................................................ 49

Bit Configuration of Key Data when Input is via S0 and S1 ............................................................... 50

Configuration of Data Pointer ............................................................................................................. 50

Configuration of Timer Counter .......................................................................................................... 65

Time Management of Timer Counter ................................................................................................. 65

Method for Dividing Frame Space Transmission Times .................................................................... 69

Key OFF Check during Bit Data Transmission .................................................................................. 70

PART 3 80-KEY PROGRAM

1-1

Application Circuit Example .............................................................................................................. 103

1-2

Key Matrix .......................................................................................................................................... 104

2-1

NEC-R Format ................................................................................................................................... 105

– iv –

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