LC7458B-04 View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LC7458B-04

Closed-Caption Decoder IC

SANYO -> Panasonic 

LC7458B-04

Figure 4. Reset circuit

Figure 5. Pulse input timing conditions 1

Figure 6. Pulse input timing conditions 2

Figure 7. Recommended interface circuit

Mode Control

The LC7458B-04 allows, using a simple interface, a CCS function to be added to any of the existing television systems.

The degree of freedom of using microcontroller input/output pins and different program changes mean that any one of

three possible interfaces can be selected to best match design requirements. The LC7458B-04 interface methods can

broadly be classified into two categories–direct control by external keys and indirect control using signals from a

microcontroller.

LC7458B-04 control method

Direct

Indirect

External key

Parallel signal

Serial signal

5-parallel input control

Pulse width signal control

TYPE1

TYPE2

TYPE3

The control method, parallel signal control (types 1 and 2) or pulse width signal (PWM) control (type 3), is selected by

the level on pin 51 when power is applied.

High : Parallel signal control (types 1 and 2)

Low : Pulse width signal (PWM) control (type 3)

No.4978–6/11

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