SPC8104 S-MOS Systems, SPC8104 Datasheet - Page 9

• Manufacturer Part Number: SPC8104
• Description: VGA LCD CONTROLLER
• Manufacturer: S-MOS Systems

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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SPC8104
Low power CMOS with 2.5V/3.3V core and 3.3V I/
O
8/16-bit ISA CPU data bus interface
Interfaces to a single 256 Kx16 DRAM
Selectable 256 cycle/4 msec or 256 cycle/32
msec DRAM refresh rate, or low power self-
refresh mode
Three hardware or software initiated power-save
modes
Supports all standard VGA modes except mode
13h.
Proprietary internal 64x4 gray scale lookup table
DESCRIPTION
FEATURES
SYSTEM BLOCK DIAGRAM
412-1.0
BUS
ISA
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
SPC8104
CLOCK
DRAM
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Programmable hardware mapping of VGA palette-
style writes to 16 level LCD gray scale values
Vertical interrupt function on IRQ pin supported
Optimized for 640x480 single and dual panel
monochrome LCD displays
Flexible support of LCD panels of various sizes
Supports 0-255 vertical non-display periods
Supports 640x480 4-bit monochrome MIM panels
Power consumption of 60 mW in active mode and
0.6 mW in “Power Save” mode when operating at
24 MHz
F0A - 128 pin QFP15 package
MONOCHROME
LCD PANEL
Data Sheet
DS-3