Title:
Engineering Specification: 12.1-inch AMLCD Monitor
Page
15 of 27
Document Number
: 023-0284-00
Revision:
A
VIDEO MODES
IBM VGA w/Border
TOTAL RESOLUTION
656 x 496
738 x 414
Active Resolution
640 x 480
720 x 400
Video Clock
25.175 MHz
28.321 MHz
Horizontal Scan Frequency
31.468 KHz
31.468 KHz
Horizontal Line Period
31.778
:
s
800 dots
31.778
:
s
900 dots
Horizontal Blanking
5.720
:
s
144 dots
5.720
:
s
162 dots
Horizontal Sync Pulse
3.813
:
s
96 dots
3.813
:
s
108 dots
Horizontal Front Porch
0.318
:
s
8 dots
0.318
:
s
9 dots
Horizontal Back Porch
1.589
:
s
40 dots
1.589
:
s
45 dots
Horizontal Active Display
26.058
:
s
656 dots
26.058
:
s
738 dots
Horizontal Sync Polarity
&
&
Vertical Scan Frequency
60.055 Hz
70.084Hz
Vertical Frame Period
16.651 ms
524 line
14.269 ms
449 line
Vertical Blanking
0.890 ms
28 line
1.112 ms
35 line
Vertical Sync Pulse
0.064 ms
2 line
0.064 ms
2 line
Vertical Front Porch
0.032 ms
1 line
0.159 ms
5 line
Vertical Back Porch
0.795 ms
25 line
0.890 ms
28 line
Vertical Active Display
15.762 ms
496 line
15.254 ms
480 line
Vertical Sync Polarity
&
%
NOTE:
VGA border included in the Active Display time described above.
26.058
:
s
656 dots
26.058
:
s
738 dots
&
&
15.762 ms
496 line
15.254 ms
480 line
&
%
VIDEO MODES
IBM VGA w/Border
TOTAL RESOLUTION
656 x 496
738 x 414
Active Resolution
640 x 480
720 x 400
Video Clock
25.175 MHz
28.321 MHz
Horizontal Scan Frequency
31.468 KHz
31.468 KHz
Horizontal Line Period
31.778
:
s
800 dots
31.778
:
s
900 dots
Horizontal Blanking
5.720
:
s
144 dots
5.720
:
s
162 dots
Horizontal Sync Pulse
3.813
:
s
96 dots
3.813
:
s
108 dots
Horizontal Front Porch
0.318
:
s
8 dots
0.318
:
s
9 dots
Horizontal Back Porch
1.589
:
s
40 dots
1.589
:
s
45 dots
Horizontal Active Display
26.058
:
s
656 dots
26.058
:
s
738 dots
Horizontal Sync Polarity
&
&
Vertical Scan Frequency
60.055 Hz
70.084Hz
Vertical Frame Period
16.651 ms
524 line
14.269 ms
449 line
Vertical Blanking
0.890 ms
28 line
1.112 ms
35 line
Vertical Sync Pulse
0.064 ms
2 line
0.064 ms
2 line
Vertical Front Porch
0.032 ms
1 line
0.159 ms
5 line
Vertical Back Porch
0.795 ms
25 line
0.890 ms
28 line
Vertical Active Display
15.762 ms
496 line
15.254 ms
480 line
Vertical Sync Polarity
&
%
NOTE:
VGA border included in the Active Display time described above.
26.058
:
s
656 dots
26.058
:
s
738 dots
&
&
15.762 ms
496 line
15.254 ms
480 line
&
%
Note: For video mode 720 x 400 missing video rows and columns are allowed. This is a text mode
only. Performance is acceptable if characters as defined section 1.2.1 are legible. Missing row or
columns at edge of display is acceptable as long as characters remain legible.