Panasonic JB-3300 Technical Manual page 199

SHIFT
HIGH
*GRAPHIC
CRTC-CLK
TEXT40
*clkl
*TEXT40
(o) Video data control circuit
In the TEXT display mode, the video data control circuit converts
font data and decoded attribute data to video data. In the GRAPHIC
display mode, it converts graphic data to video data to be output to
the plasma display. The converted video data is latched to the video
data latch at the rising edge of the SHIFT signal.
Figure 5-54 shows a video data control circuit diagram.
lst Converter 2nd Converter
LS51 (1/2) LS51(2/2)
IG
!
3rd Converter
Video Data Latch
|
poo qq)
oT 4
| TBP24SI0N , TBP24SI0N , | LS174 (4/6)
LCHG7 AO QO |
6
Q|
5
4 t
3 y
2 |
1 \
0 |
|
|
I
[
GRAPHIC
LINH
LREVERSE
* CURSORDLY
LUNDER
Figure 5-54 Video Data Control Circuit
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