LC7458B-04 查看數據表（PDF） - SANYO -> Panasonic

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LC7458B-04

Closed-Caption Decoder IC

SANYO -> Panasonic 

Type 1 : External Key Control

Type 2 : 5 Parallel input Control

LC7458B-04

Changed microcontroller parameters :

1. Hardware

None

2. Software

None

If pin 50 (DISP ON/OFF) is tied to GND, then 4-key control is also possible.

Note that pin 51 (PARA/SERI) is used pull-up.

Changed microcontroller parameters :

1. Hardware

5 output pins required

2. Software

Parallel signal generation

Note that pin 51 (PARA/SERI) is used pull-up.

Type 3 : Pulse Width Signal (PWM)

Changed microcontroller parameters :

1. Hardware

1 output pin required

2. Software

PWN control signal generation

Note that pin 51 (PARA/SERI) and pin 52 are connected to GND.

Parallel Input Control

DEC ON/OFF (pin 45)

Caption system decoder function ON/OFF switching

High : Caption OFF

Low : Caption ON

CAP/TEXT (pin 46)

Caption/text switching

High : Caption

Low : Text

F1/F2 (pin 47)

Caption field switching

High : Field 1

Low : Field 2

CH1/CH2 (pin 48)

Caption channel switching

High : Channel 1

Low : Channel 2

DISP ON/OFF (pin 50)

Caption display ON/OFF switching

High : Caption display OFF

Low : Caption display ON

Each switch should be lock-type with a chattering rejection

time of 60ms

No.4978–7/11

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