B69000 Asiliant Technologies, B69000 Datasheet - Page 229

• Manufacturer Part Number: B69000
• Manufacturer: Asiliant Technologies

Specifications of B69000

• Lead Free Status / Rohs Status: Supplier Unconfirmed

15-14
FR11
read/write at I/O address 3D1h with index at I/O address 3D0h set to 11h
7
6-4
Notes:
&+,36
Res Dither
[6-4]
Bits
000
001
010
011
100
101
110
111
7
FP Restrict Dither (reset state: 0)
0: Dithering can be enabled on all modes.
1: Dithering can be enabled only on modes with more than 256 colors.
Bits Per Pixel Select (reset state: 000)
1)
2)
3)
4)
5)
69000 Databook
#MSBs
Gray/Color without dither
Used
FP Format 1 Register
0
1
2
3
4
5
6
8
No FRC is the recommended setting when interfacing with color TFT panel with more than
12 bits per pixel (4K color) or interfacing with monochrome panel with internal gray scaling.
When No FRC is chosen FR11 bits 6-4 should be programmed equal to the number of bits/
color of the panel. For example, a TFT panel with 18 bits/pixel color uses 6 bits/color. FR11
bits 6-4 should be programmed to 110b.
2-frame FRC should be used with color TFT panel with less than or equal to 12 bits per
pixel (<4k color) or used with monochrome panel with internal gray scaling. When 2-frame
FRC is chosen FR11 bits 6-4 should be programmed equal to the number of bits/color of
the panel plus 1. The extra bit is for the 2-frame FRC. For example, a TFT panel with 9
bits/pixel color uses 3 bits/color. FR11 bits 16-4 should be programmed equal to 100b.
16-frame FRC should be used with STN panel. To achieve 16-frame FRC, 4 bits are
needed for each color (R, G, B).
When 2-bit dither is disabled, the theoretical Color/Gray level per R, G, and B is calculated
by using the formula below:
Theoretical Color/Gray level = 2
When 2-frame FRC or 16-frame FRC is enabled the actual Color/Gray level per R, G, and
B that can be achieved is less than the theoretical Color/Gray level.
When 2-bit dither is enabled, the theoretical Color/Gray level per R, G, and B is calculated
by using the formula below:
Theoretical Color/Gray Level = 4 * 2
6
No FRC
256
16
32
64
—
2
4
8
Bits Per Pixel
2-Frame
5
FRC
15
31
—
—
—
—
3
5
Subject to Change Without Notice
16-Frame
Flat Panel Registers
FRC
4
16
—
—
—
—
X
X
[6-4]
Bits
000
001
010
011
100
101
110
111
3
Dither Enable
where X is number of bits/color selected
where X is number of bits/color selected
#MSBs
Used
Gray/Color with dither
0
1
2
3
4
5
6
8
2
No FRC
125
253
13
29
61
—
5
Revision 1.3 8/31/98
1
2-Frame
FRC
121
25
57
—
—
—
—
9
FRC
16-Frame
FRC
0
61
—
—
—
—