LC74775 データシートの表示（PDF） - SANYO -> Panasonic

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LC74775

On-Screen Display Controller IC

SANYO -> Panasonic 

LC74775, 74775M

• Second byte

DA 0 to 7

7

6

5

4

3

2

1

0

Register

at

c6

c5

c4

c3

c2

c1

c0

State

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

Contents

Function

Character attribute off

Character attribute on

Character code (00 to 7F hexadecimal)

(7EHEX: Space character)

(7FHEX: Transparent space character)

Note: All registers are set to 0 when the LC74775/M is reset by the RST pin.

Notes

COMMAND2: Vertical display start position and vertical character size setup command

• First byte

DA 0 to 7

7

6

5

4

3

2

1

0

Register

–

–

–

–

VS21

VS20

VS11

VS10

State

1

0

1

0

0

1

0

1

0

1

0

1

Contents

Function

Command 2 identification code.

Vertical display start position and the vertical character

size setup.

VS20

VS21

0

1

VS10

VS11

0

1

0

1H/dot

3H/dot

0

1H/dot

3H/dot

1

2H/dot

1H/dot

1

2H/dot

1H/dot

Notes

Second line vertical character size

First line vertical character size

• Second byte

DA 0 to 7

Register

State

Contents

Function

7

–

0

Second byte identification bit

0

Crystal oscillator frequency: 2fsc

6

FS

1

Crystal oscillator frequency: 4fsc

VP5

0

If VS is the vertical display start position then:

5

5

(MSB)

1

VS = α +H × 2 ∑ 2n VPn

n=0

4

VP4

0

H: The horizontal synchronization pulse period

1

α = 20H (525H systems)

0

α = 25H (625H systems)

3

VP3

1

0

2

VP2

1

0

1

VP1

1

Character display area

VP0

0

0

(LSB)

1

Note: All registers are set to 0 when the LC74775/M is reset by the RST pin.

Notes

The vertical display start position is set by the

6 bits VP0 to VP5.

The weight of bit 1 is 2H.

No. 5919-11/35

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