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參數(shù)資料
| 型號(hào)： | 141540 |
| 廠商： | Motorola, Inc. |
| 英文描述： | Monitor On-Screen Display CMOS |
| 中文描述： | 顯示器屏幕顯示的CMOS |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 186K |
| 代理商： | 141540 |
MC141540
8
MOTOROLA
1
2
3
4
5
0
VFLB
H
R
C
6
2
3
2
2
2
d
d
C
C
&
s
&
c
c
c
c
c
c
1
variable number of H scan lines
vertical delay =
VERTD x 4 + 1 H scan lines
h
D
a
d
.
H
Figure 8. Display Frame Format
Figure 9 illustrates the timing of all output signals as a
function of window and fast–blanking features. Line 3 of all
three characters is used to illustrate the timing signals. The
shaded area depicts the window area. The characters on the
left and right appear identical except for the FBKGC bit. The
middle character does not have a window as its background.
Notice that signal HTONE is active only in the window area.
Timing of the signal FBKG depends on the configuration of
the FBKGC bit. The configuration of the FBKGC bit affects
only the FBKG signal timing; it has no effect on the timing of
HTONE. Waveform ‘R, G, or B’, which is the actual waveform
at R, G, or B pin, is the logical OR of waveform ‘character R,
G, or B’ and waveform ‘window R, G, or B’. ‘Character R, G,
or B’ and ‘window R, G, or B’ are internal signals for illustra-
tion purpose only. Also notice that HTONE has exactly the
same waveform as ‘window R, G, or B’.
ììììììì
ììììììì
ììììììì
ììììììì
ììììììì
ììììììì
ììììììì
F
F
C
H
ììììììì
ììììììì
ììììììì
ììììììì
ììììììì
ììììììì
ììììììì
F
C
3
L
W
C
R
Figure 9. Timing of Output Signals as a Function
of Window and FBKGC Bit Features
FONT
Icon Combination
MC141540 contains 128–character ROM. The user can
create an on–screen menu based on those characters and
icons. Addresses $00 and $7F are predefined characters.
They cannot be modified in any MOSDs.
ROM CONTENT
Figures 10 – 13 show the ROM content of MC141540.
Mask ROM is optional for custom parts.
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