SPC8106 S-MOS Systems, SPC8106 Datasheet - Page 418
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SPC8106
Manufacturer Part Number
SPC8106
Description
LCD/CRT VGA CONTROLLER
Manufacturer
S-MOS Systems
Datasheet
1.SPC8106.pdf
(432 pages)
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SDU8106B
Rev. 1.0 Evaluation Board User Manual
SPC8106
0F
3.12 Fixed 3.3 Volt Power Supply
The SPC8106 VCC Core voltage can either be 3.3V or 5.0 V (as selected by MD8). To provide
3.3V VCC Core voltage for SPC8106, an independent fixed 3.3V power supply at 0.5A (maxi-
mum) has been provided as an integral part of this design using National LP2960AIN-3.3
Micropower 0.5A Low-Dropout Voltage Regulator. For the purpose of this design, 5V VCC Core
voltage operation will not be supported
3.13 PCB Layout Considerations
This board is constructed of four layers to accomodate various power/ground requirements. There
are no traces on the mid-layers of the PCB board. As well there are no traces crossing the clock
signals to avoid noise from the clock lines.
In this layout the 40-pin LCD connector is located near the SPC8106 chip to reduce capacitive
loading and provide noise protection to the signal lines. The CRT connector is available at the out-
side rear edge of the board (facing the back of the computer).
EV2-16
411-1.0
S-MOS Systems, Inc. • Tel: (408) 922-0200 • Fax: (408) 922-0238 • http://www.smos.com
X12-AN-005-02
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