SPC8104 S-MOS Systems, SPC8104 Datasheet - Page 38

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

3.0
The SPC8104 is a low power, mixed voltage video controller based on VGA architecture and opti-
mized for driving a 640x480 LCD panel display. VGA standard mode functionality is supported
using standard IBM VGA parameters. A proprietary 64 x 4 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 sub-notebook com-
puters, or other specialized consumer products where low cost, low power consumption, low
component 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
(e.g. mode 12h), and will display 16 levels of gray.
3.1
The following figure shows a typical system implementation with SPC8104.
Hardware Functional Specification
SP1-12
RESETDRV
SUSPEND#
-REFRESH
-MEMCS16
OVERVIEW DESCRIPTION
Typical System Block Diagram
ISA BUS
IOCHRDY
-SMEMW
LA[23:17]
16-BIT
-SMEMR
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
50%duty
SA[16:0]
SD[15:0]
-IOCS16
DOZE#
-SBHE
32kHz
BALE
-IOW
IRQ2
-IOR
AEN
Figure 1 : Typical System Block
RESET
A[16:0]
LA[23:17]
D[15:0]
MEMCS16#
IOCS16#
ALE
BHE#
SUSPEND#
DOZE#
PDCLK
MEMEN
IOEN#
IOR#
IOW#
MEMR#
MEMW#
READY
IRQ
SPC8104
256Kx16 DRAM
50%duty
28MHz
X15-SP-001-08.1
DiagramSource: a000067.cdr
LCDPWR#
UD[3:0]
LD[3:0]
XSCL
WF
YD
LP
YD
LP
WF
XSCL
UD[3:0]
LD[3:0]
LCDPWR#
LCD/MIM PANEL
DISPLAY
412-1.0
SPC8104