LC74781M 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LC74781M

On-Screen Display Controller LSI for VCR Products

SANYO -> Panasonic 

LC74781, 74781M

Second byte

DA0 to DA7 Register name

State

Register content

Function

7

—

0

0

6

c6

1

0

5

c5

1

0

4

c4

1

0

3

c3

Character code (00 to 7F hexadecimal)

1

0

2

c2

1

0

1

c1

1

0

0

c0

1

Note: The register states are all set to zero when the LC74781/M is reset with the RST pin.

Note

z COMMAND2 (Vertical display start position and vertical character size setup command)

First byte

DA0 to DA7

7

6

5

4

3

2

1

0

Register name

—

—

—

—

VS21

VS20

VS11

VS10

State

1

0

1

0

0

1

0

1

0

1

0

1

Register content

Function

Command 2 identification code

Set the vertical display start position and vertical character size.

VS21

VS20

0

0

1H per dot

1

3H per dot

VS11

VS10

0

0

1H per dot

1

3H per dot

1

2H per dot

1H per dot

1

2H per dot

1H per dot

Note

Second line vertical character size

First line vertical character size

Second byte

DA0 to DA7 Register name

State

Register content

Function

7

—

0 Second byte identification bit

0 Crystal oscillator frequency: 2fsc

6

FS

1 Crystal oscillator frequency: 4fsc

5

VP5

(MSB)

0

If VS is the vertical display start position then:

1

0

5

VS

=

H

×

(2Σ

n=

20nVPn)

4

VP4

1

H: the horizontal synchronization pulse period

0

3

VP3

1

0

2

VP2

1

0

1

VP1

1

0

VP0

0

(LSB)

1

Note: The register states are all set to zero when the LC74781/M is reset with the RST pin.

Note

The vertical display start position is set

by the 6 bits VP0 to VP5.

The weight of bit 1 is 2H.

No. 4988-9/16

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