SPC8106 S-MOS Systems, SPC8106 Datasheet - Page 416

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

3.0
3.1
This board directly supports the 16-bit ISA Bus via a standard AT edge connector. For the pur-
pose of this design 8-bit ISA operation will not be supported.
3.2
The SPC8106 supports both symmetrical and asymmetrical DRAMs. A single chip on-board
512K DRAM solution is supported using one 5V, 256K x 16 configuration, symmetrical architec-
ture, SMD SOJ package DRAM. For the purpose of this design, no other DRAM configuration will
be supported.
3.3
The SPC8106 supports 4- and 8-bit single and dual scan monochrome STN LCD panels. All the
necessary signals are provided on the 40-pin LCD connector (J6). The interface signals are alter-
nated with grounds on the cable to reduce crosstalk and noise related problems.
Refer to “SDU8106B0F LCD Connector (J6) Pinout” on page 13 for your specific requirements.
3.4
The SPC8106 supports 4-, 8-, and 16-bit single and dual scan color STN LCD panels. All the nec-
essary signals can be found on the 40-pin LCD connector (J6). The interface signals are alter-
nated with grounds on the cable to reduce crosstalk and noise related problems. External circuitry
provides 16-bit color panel support by latching the 8 bits of output data from the SPC8106 to pro-
vide 16 bits of data on the next clock. Refer to the SPC8106 Functional Specification, Drawing
Office No. X12-SP-001-xx for further details.
Refer to “SDU8106B0F LCD Connector (J6) Pinout” on page 13 for your specific requirements.
3.5
The SPC8106 also supports 9- and 12-bit active matrix color TFT panels. All the necessary sig-
nals can also be found on the 40-pin LCD connector (J6). While supporting 12-bit TFT panel,
Sprite support on the CRT is not possible as the overlay pins OL0, OL1, and OL23 of SPC8106
are used as TFT data pins. Refer to the SPC8106 Functional Specification, Drawing Office No.
X12-SP-001-xx for further details.
Refer to “SDU8106B0F LCD Connector (J6) Pinout” on page 13 for your specific requirements.
3.6
This evaluation board provides CRT support with the addition of an external RAMDAC
(ATT20C497 or equivalent). The presence of an external RAMDAC/CRT can be determined by
software on power-up. The default display is CRT if attached.
The ATT20C497 RAMDAC is provided on the board to fully test all of the CRT display modes
available with the SPC8106 including sprite/hardware cursor display.
When a software power save mode is selected, the ATT20C497 RAMDAC is placed into “sleep
mode” (refer to AT&T ATT20C497 specification for complete details on “sleep mode”). This is
done by programming the ATT20C497 RAMDAC Command Register. The on-board BIOS pro-
vides this feature automatically.
SDU8106B
EV2-14
TECHNICAL DESCRIPTION
ISA Bus Interface
512K DRAM Support
Monochrome LCD Support
Color LCD Panels Support
Color TFT panels Support
External CMOS RAMDAC Support
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
0F
Rev. 1.0 Evaluation Board User Manual
X12-AN-005-02
411-1.0
SPC8106