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Liquid Crystal Display Controller
BIT
8
7
6
5
4
3:1
0
14-16
Table 14-20. CTRL Register Definitions (Cont'd)
NAME
///
Reserved Set to 0.
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.
Monochrome LCD 4-/8-bit Interface This bit controls whether
monochrome STN LCD uses a 4- or 8-bit parallel interface. It has no
meaning in other modes, program to zero.
LcdMono8
0 = Mono LCD uses 4-bit interface.
1 = Mono LCD uses 8-bit interface.
///
Reserved Set to 0.
///
Reserved Set to 1.
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 that the LCD is running before power is applied.
LcdEn
For this reason, the LCD's power-on control (bit [11]) is not set to 1 un-
less both LcdEn and LcdPwr are set to 1. Most LCD displays require
the LcdEn to be set to 1 approximately 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.
LH75400/01/10/11 (Preliminary) User's Guide
DESCRIPTION
6/17/03
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