LA76818 データシートの表示（PDF） - SANYO -> Panasonic

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LA76818

The BUS Control Functions of LA76818 (Tentative)

SANYO -> Panasonic 

Technical Note of LA76818

2002/01/23

The blanking of the left side of screen can be adjusted

*The design of FBP input circuit become simple because of the blanking of screen can

be adjusted independently).

H BLK R

3 Right H-Blanking Control ( Width/Phase )

The blanking of the right side of screen can be adjusted

*The design of FBP input circuit become simple because of the blanking of screen can

be adjusted independently).

V.TEST

Vertical test mode

01〜11:Test mode

00:Nomal mode

2 Select vertical DAC test mode

V.COMP

3 Align vertical size compensation

Compensate vertical size due to the variation of contrast.

Count Down Mode

3 Select vertical countdown mode

This function is used to switch 50Hz/60Hz mode and standard/non-standard mode of

countdown circuit.

* Switch for standard/non-standard mode

0** : Automatic discriminate standard/non-standard mode

1** : Non-standard mode

Standard mode:

Using the dividing pulse of V countdown to reset the countdown circuit. A stable

synchronization signal can be achieved because it is not interfered by the external

vertical trigger. It becomes standard mode if it is synchronize with the standard

signal(262.5H or 312.5H).

Non-standard mode:

Using external vertical trigger to reset countdown circuit. In this case, the stability of

the sync signal is depended on external signal. This mode is used when the sync signal

cannot achieved or the frequency of sync signal is not 262.5H or 312.5H.

*Switch for 50/60 mode

00 : Automatic discriminate 50Hz/60Hz mode

01 : 50Hz mode

10 : 60Hz mode

11 : 50/60Hz automatic discriminate mode

60Hz mode : Vertical trigger is accepted during 225H〜297H

50Hz mode : Vertical trigger is accepted during 288H〜357H

50Hz/60Hz automatic discriminate mode : 50Hz/60Hz mode is selected

automatically.

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