No. 5396-10/15

LC74751

Address 191 (0BF hexadecimal)

DA

Register

Contents

Notes

0 to C

State

Function

0

BCOL

0

Background color provided (only valid in internal synchronization mode)

1

No background color (Only the background level is set)

1

CBOFF

0

The burst signal is always output.

1

The burst signal is not output when BCOL is high.

2

EXT/

0

External synchronization

Switches between external and internal

INT

1

Internal synchronization

sources for the HSYNC and VSYNC signals.

3

BLINK0

0

Changes the blinking duty ratio.

1

4

BLINK1

0

1

5

BLINK2

0

Blinking period: 0.5 s

Changes the blinking period.

1

Blinking period: 1.0 s

6

RVSON

0

Reverse video off

1

Reverse video on

7

BLK0

0

Changes the blanking size

1

8

BLK1

0

1

9

—

0

1

A

VSNSEP

0

Selects V input when superimpose mode is used.

1

Internal V separation circuit used

B

TSTMOD

0

Normal operating mode

This bit must be set to 0.

1

Test mode

BLK0

0

1

BLK1

0

Blinking off

Character size

1

Frame size

Whole area size

BLINK0

0

1

BLINK1

0

Blinking off

25% duty

1

50% duty

75% duty

Note: The states of all registers are set to zero when the IC is reset by the RST pin.