SPC8106 S-MOS Systems, SPC8106 Datasheet - Page 15

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

SPC8106
Data Sheet
Auxiliary Ports
The Auxiliary Ports are I/O registers used to control functions of the chip beyond the basic VGA
register set. Registers are included for controlling the LCD interface circuits as well as the power
save modes.
VGA Ports
The VGA Ports contain the Miscellaneous Output Status register and the Video Subsystem
Enable register used in VGA mode.
Clock Generation
The Clock Generation contains oscillator support for external crystals.
Power Save
The Power Save block contains the logic to implement six software controlled and one hardware
controlled power down modes.
Lookup Table
The Lookup Table consists of a memory array of 256 locations of 12 bits each and hardware to
convert VGA palette writes to gray-scale values.
LCD Interface
The LCD Interface block converts the display video data from the Lookup Table into LCD display
data. It also generates control signals necessary to drive single or dual-panel LCD panels. For
monochrome LCD panels, the LCD interface block generates a maximum 64 gray shades through
frame rate modulation and dithering techniques. For color LCD panels, the LCD interface block
generates 256 simultaneous colors from a possible 4096 colors through frame rate modulation.
Hardware Cursor
The Hardware Cursor block generates a 4 gray shade or color cursor/sprite that can be overlaid
on the LCD or CRT display. The cursor is 64 x 64 pixels or optionally expanded to 128 x 128
through pixel replication.
411-1.0
DS-9
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com