Lcd frame buffer start address (fbaddr), Lcd frame buffer start address (fbaddr) -9, Table 9-2: gray scale value to color mapping -9 – Cirrus Logic EP73xx User Manual
Page 99: Fbaddr), Lcd frame buffer start address
EP7309/11/12 User’s Manual - DS508UM4
9-9
Copyright Cirrus Logic, Inc. 2003
LCD Interface
99
9
LCD Frame Buffer Start Address (
FBADDR)
Address:
0x8000.1000, Read / Write
Definition:
This register contains the start address for the LCD Frame Buffer. It
assumes that the frame buffer starts at location 0x0000000 within
each chip select memory region. Value programmed will set the start
address in system memory. On reset, the default value is 0xC which
corresponds to the physical location of 0xC0000000.
The register is 4 bits wide and must only be programmed when the
LCD is disabled (LCDEN bit in SYSCON1 is cleared).
Table 9-2: Gray Scale Value to Color Mapping
Gray scale Value
Duty Cycle
% Pixels Lit
% Step Change
0
0
0%
11.1%
1
1/9
11.1%
8.9%
2
1/5
20.0%
6.7%
3
4/15
26.7%
6.6%
4
3/9
33.3%
6.7%
5
2/5
40.0%
5.4%
6
4/9
44.4%
5.6%
7
1/2
50.0%
0.0%
8
1/2
50.0%
5.6%
9
5/9
55.6%
5.4%
10
3/5
60.0%
6.7%
11
6/9
66.7%
6.6%
12
11/15
73.3%
6.7%
13
4/5
80.0%
8.9%
14
8/9
88.9%
11.1%
15
1
100%