412-1.0
SPC8104 Data Sheet
DS-3
S-MOS Systems, Inc. • Tel: (408) 922-0200 • Fax: (408) 922-0238 • http://www.smos.com
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DESCRIPTION
The SPC8104 is a low power, mixed 2.5/3.3 volt graphics controller based on VGA architecture
and optimized for driving a 640x480 LCD panel display.VGA standard mode functionality (with
the exception of mode 13h) is supported using standard IBM VGA parameters. A proprietary
64x4-bit gray scale lookup table is provided to allow re-mapping of the 16 possible gray shades
displayed on an LCD panel.
The target markets for this device are small, cost sensitive mixed 2.5V/3.3V hand-held organiz-
ers, or other specialized consumer products where low cost, low power consumption, low compo-
nent count, and the ability to run most VGA software on a 640x480 LCD panel display are the
major design considerations.This chip is intended to operate mainly in planar graphics modes.
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FEATURES
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Low power CMOS with 2.5V/3.3V core and 3.3V I/
O
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8/16-bit ISA CPU data bus interface
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Interfaces to a single 256 Kx16 DRAM
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Selectable 256 cycle/4 msec or 256 cycle/32
msec DRAM refresh rate, or low power self-
refresh mode
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Three hardware or software initiated power-save
modes
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Supports all standard VGA modes except mode
13h.
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Proprietary internal 64x4 gray scale lookup table
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Programmable hardware mapping of VGA palette-
style writes to 16 level LCD gray scale values
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Vertical interrupt function on IRQ pin supported
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Optimized for 640x480 single and dual panel
monochrome LCD displays
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Flexible support of LCD panels of various sizes
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Supports 0-255 vertical non-display periods
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Supports 640x480 4-bit monochrome MIM panels
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Power consumption of 60 mW in active mode and
0.6 mW in “Power Save” mode when operating at
24 MHz
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F0A - 128 pin QFP15 package
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SYSTEM BLOCK DIAGRAM
MONOCHROME
ISA SPC8104
DRAM
CLOCK
BUS LCD PANEL
