SPC8106 S-MOS Systems, SPC8106 Datasheet - Page 125

• Manufacturer Part Number: SPC8106
• Description: LCD/CRT VGA CONTROLLER
• Manufacturer: S-MOS Systems

10.2 DoubleScan Support
DoubleScan is a feature in the SPC8106 that allows simultaneous display of both the CRT and
LCD panel. Refer to the following table for supported video modes and limitations.
SPC8106
DoubleScan is not supported when using a Dual panel / Dual drive LCD.
All non-480 line modes (when using a 480 line panel) will show a wrap-around effect if
DoubleScan is enabled. For example: display a 400 line mode on a 480 line panel and enable
DoubleScan. You would see the top 78 lines duplicated on the bottom 78 lines (wrap-around
affect).
If using a panel with less than 480 vertical lines, DoubleScan will be supported, however, the
maximum LCD frame-rate may be violated. Therefore, the specific panel should be referenced.
If supporting a TFT panel requiring CRT-like timing (AUX[00] bit 5=1 and AUX[0B] bit 1=1) the
panel handles the 350, 400 and 480 line modes, providing screen positioning internally. As the
result of this direct support, DoubleScan is supported for all standard VGA and some extended
modes.
411-1.0
Mode
No.
0++
1++
2++
3++
100
101
108
0D
0E
0F
0+
1+
2+
3+
7+
10
11
12
13
0
1
2
3
4
5
6
7
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
Mode Type
Graphics
Graphics
Graphics
Graphics
Graphics
Graphics
Graphics
Graphics
Graphics
Graphics
Graphics
Graphics
Text
Text
Text
Text
Text
Text
Text
Text
Text
Text
Text
Text
Text
Text
Text
8 x 14
9 x 16
8 x 14
9 x 16
8 x 14
9 x 16
8 x 14
9 x 16
8 x 14
9 x 16
Font
8 x 8
8 x 8
8 x 8
8 x 8
8 x 8
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Table 0-48 CRT Display Modes
Characters Resolution
40 x 25
40 x 25
40 x 25
40 x 25
40 x 25
40 x 25
80 x 25
80 x 25
80 x 25
80 x 25
80 x 25
80 x 25
80 x 25
80 x 25
80 x 60
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
X12-SP-001-07
320 x 200
320 x 350
360 x 400
320 x 200
320 x 350
360 x 400
640 x 200
640 x 350
720 x 400
640 x 200
640 x 350
720 x 400
320 x 200
320 x 200
640 x 200
640 x 350
720 x 400
320 x 200
640 x 200
640 x 350
640 x 350
640 x 480
640 x 480
320 x 200
640 x 400
640 x 480
640 x 480
Displayed
640 x 480
640 x 480
640x400
640x350
720x400
640x400
640x350
720x400
640x400
640x350
640x400
640x400
640x350
640x400
640x400
640x400
640x400
640x350
720x400
640x400
640x400
640x350
640x350
640x480
640x480
640x400
640x400
Pixels
Hardware Functional Specification
Colors
256
256
256
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
4
4
2
2
2
2
2
Segment
Memory
B800
B800
B800
B800
B800
B800
B800
B800
B800
B800
B800
B800
B800
B800
B800
B000
B000
A000
A000
A000
A000
A000
A000
A000
A000
A000
B800
SP1-83