SPC8106 S-MOS Systems, SPC8106 Datasheet - Page 153

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

LCD “B Set” Panel Size Registers
bits 7-0
SPC8106
CRT Controller Index/Data Register
17 Mode Control Register RW
Retrace
Enable RO
Status
Read 1
18 Line Compare Register RW
Line
Compare
Bit 7
24 Attribute Controller Addr/Data Flip-Flop Register RO
Attribute Ctl
Index/Data
CRT Controller Index/Data Register
3B4/D4h RW 3B5/D5h RW
n/a
01 Horizontal Panel Size Register RW (if AUX[00] bit 0 = 1)
Horizontal
Panel Size
Bit 7
registers and bits marked as “Dummy” or “Dummy R/W Bit” are read/write bits that have no
effect in hardware. These registers and bits are provided for compatibility with some software
that expects to use the values stored in these bits;
index 11 bit 7 Protect CRTC Registers 0-7 - when set to 1, this bit protects the following registers
and bits from being written: index 00, 01, 02, 03, 04, 05, 06 - all bits, and index 07 bits
7,6,5,3,2,1,0.
in LCD only mode (AUX[0B] bits 1,0 = 0,1), the following CRTC registers are ignored and are
treated as Dummy R/W bits:
index 00, 02, 03, 04, 05, 06, 10, 15, 16 - all bits
index 07 - bits 7, 6, 5, 3, 2, 0
index 09 - bits 6, 5
index 11 - bits 3, 2, 1, 0
index 17 - bits 2, 3
411-1.0
Byte/Word
Mode Select
Line
Compare
Bit 6
n/a
n/a
Horizontal
Panel Size
Bit 6
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Horizontal Panel Size Bits [7:0]
The value in this register specifies the horizontal size of the LCD panel in the number of 8-dot char-
acters. For example, a 640 dot panel is programmed with the value 640 8 = 50h. This register is
ignored if AUX[0B] bit 1 = 1, i.e. if CRT mode is enabled.
MA0 Select
MA13/15
Line
Compare
Bit 5
n/a
CRT
Controller
Index Bit 5
Horizontal
Panel Size
Bit 5
n/a
Line
Compare
Bit 4
n/a
CRT
Controller
Index Bit 4
Horizontal
Panel Size
Bit 4
X12-SP-001-07
Dummy
Count by 2
R/W
Line
Compare
Bit 3
n/a
CRT
Controller
Index Bit 3
Horizontal
Panel Size
Bit 3
Dummy
HRTC/2
R/W
Line
Compare
Bit 2
n/a
CRT
Controller
Index Bit 2
Horizontal
Panel Size
Bit 2
Hardware Functional Specification
MA14 Select
MA14/rsc
Line
Compare
Bit 1
n/a
CRT
Controller
Index Bit 1
Horizontal
Panel Size
Bit 1
Compat
Mode Select
Line
Compare
Bit 0
n/a
CRT
Controller
Index Bit 0
Horizontal
Panel Size
Bit 0
SP1-111