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LH75400/01/10/11 (Preliminary) User's Guide
BIT
8
7
6
5
4
3:1
0
Table 13-23. Ctrl Register Definitions (Cont'd)
NAME
RGB or BGR Format Selection
BGR
0 = RGB normal output.
1 = BGR red and blue swapped.
LCD Interface is Dual-Panel STN This bit has no meaning in other modes,
program to zero.
LcdDual
0 = Single-panel LCD is in use.
1 = Dual-panel LCD is in use.
If this bit is set and bit [4] is cleared, unexpected results occur.
///
Reserved Always write as 0.
LCD is TFT
LcdTFT
0 = LCD is an STN display — use grayscaler.
1 = LCD is TFT — do not use grayscaler.
STN LCD is Monochrome (Black and White)
0 = STN LCD is color.
LcdBW
1 = STN LCD is monochrome.
If this bit is cleared and bit [7] is set, unexpected results occur.
LCD Bits per Pixel
000 = 1 bpp
001 = 2 bpp
010 = 4 bpp
LcdBpp
011 = 8 bpp
100 = 12 bpp (16 bits fetched from memory)
101 = Reserved
110 = Reserved
111 = Reserved
LCD Controller Enable
0 = LCD Controller is disabled.
1 = LCD Controller is enabled.
LCD displays require the LCD to be running before power is applied. For this rea-
LcdEn
son, the LCD's power-on control (bit [11]) is not set to 1 unless both LcdEn and
LcdPwr are set to 1. Most LCD displays require the LcdEn to be set to 1 approxi-
mately 20 ms before LcdPwr is set to 1 for powering up. Likewise, LcdPwr should
be set to 0 (20 ms) before LcdEn is set to 0 for powering down. 20 ms is a typical
value. Refer to the documentation that came with your panel for the correct time.
Color Liquid Crystal Display Controller
DESCRIPTION
7/15/03
13-19
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