SPC8106 S-MOS Systems, SPC8106 Datasheet - Page 213

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

A.2 DRAM Refresh
This status is used by the BIOS at power up to set the 32/4 ms bit in Auxiliary Register 2 bit 0. If
the bit is 0, then 4 ms DRAMs are present and Auxiliary Register 2 bit should be set to 0. If the bit
is 1, then 32 ms DRAMs are present and the bit should be set to 1. The status of MD10 can be
read at Auxiliary Configuration Readback Register 0 (3DFH index 0CH) bit 5.
A.3 Power Save Mode Clock Source
MD11 and MD12 are used by the BIOS during initialization to set the appropriate power save
mode 4 clock source bits as per the table below. The status of MD11 can be read at Auxiliary
Configuration Readback Register (3DFH index 0CH) bit 6. The status of MD12 can be read at
Auxiliary Configuration Readback Register (3DFH index 0CH) bit 7.
SPC8106
411-1.0
Pin Name
MD10
Pin Name
MD11
MD12
CLKI
MEMEN
Self Refresh
PDCLK
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
Pin No.
67
Pin No.
69
74
MD12
0
0
1
1
Configuration Pin Functionality
32/4 ms DRAM refresh
Configuration Pin Functionality
Power Save Mode 4 Clock Source bit 0
Power Save Mode 4 Clock Source bit 1
MD11
0
1
0
1
X12-SP-002-03.1
BIOS Functional Specification
SP2-43