No. 5396-9/15

LC74751

Address 190 (0BE hexadecimal)

DA

Register

Contents

Notes

0 to C

State

Function

0

PHASE0

0

1

1

PHASE1

0

1

2

PHASE2

0

1

3

SIGMD0

0

1

4

SIGMD1

0

1

5

SYSRST

0

The IC is reset by a low level on the CS pin, and the

1

Resets all registers and turns display off.

reset state is cleared by a high level on that pin.

6

MUTE

0

Normal output

1

7

DSPON

0

Character display off

1

Character display on

8

OSCSTP

0

Crystal oscillator and LC oscillator circuits are not stopped.

Only valid in external synchronization mode

1

Stops the crystal oscillator and LC oscillator circuits.

when character display is off.

9

2fsc/

0

Clock frequency: 2fsc

Crystal oscillator circuit frequency

4fsc/

1

Clock frequency: 4fsc

A

LC/

0

The LC oscillator is used for the dot clock.

XTAL

1

The crystal oscillator is used for the dot clock.

oscillator circuit is not used.

B

INT/

0

Interlaced (262.5 H per field: NTSC, 312.5 H per field: PAL)

Switches interlaced and noninterlaced display.

NON

1

Noninterlaced (263 H per field: NTSC, 313 H per field: PAL)

SIGMD1

SIGMD0

Signal format

0

0

NTSC

0

1

PAL

1

0

PAL-M

1

1

PAL-N

PHASE2 PHASE1 PHASE0

Background color (phase)

NTSC

PAL (PAL-M, N)

0

0

0

π/2

±

π/2

0

0

1

π

In phase

0

1

0

3

π/2

π/2

0

1

1

In phase

±

π

1

0

0

π/4

±3

π/4

1

0

1

3

π/4

±

π/4

1

1

0

5

π/4

π/4

1

1

1

7

π/4

±3

π/4

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

Background color

The phase of the background color with

respect to the color burst signal.

-+

-+