UM10503
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User manual
Rev. 2.1 — 10 December 2015
916 of 1441
NXP Semiconductors
UM10503
Chapter 29: LPC43xx/LPC43Sxx LCD
29.6.7 LCD Control register
The CTRL register controls the LCD operating mode and the panel pixel parameters.
Table 678. Lower Panel Frame Base register (LPBASE, address 0x4000 8014) bit
description
Bit
Symbol
Description
Reset
value
2:0
-
Reserved, user software should not write ones to reserved bits.
The value read from a reserved bit is not defined.
-
31:3
LCDLPBASE
LCD lower panel base address.
This is the start address of the lower panel frame data in memory
and is doubleword aligned.
0x0
Table 679. LCD Control register (CTRL, address 0x4000 8018) bit description
Bit
Symbol
Description
Reset
value
0
LCDEN
LCD enable control bit.
0 = LCD disabled. Signals LCDLP, LCDDCLK, LCDFP,
LCDENAB, and LCDLE are low.
1 = LCD enabled. Signals LCDLP, LCDDCLK, LCDFP,
LCDENAB, and LCDLE are high.
See LCD power-up and power-down sequence for details on
LCD power sequencing.
0x0
3:1
LCDBPP
LCD bits per pixel:
Selects the number of bits per LCD pixel:
000 = 1 bpp.
001 = 2 bpp.
010 = 4 bpp.
011 = 8 bpp.
100 = 16 bpp.
101 = 24 bpp (TFT panel only).
110 = 16 bpp, 5:6:5 mode.
111 = 12 bpp, 4:4:4 mode.
0x0
4
LCDBW
STN LCD monochrome/color selection.
0 = STN LCD is color.
1 = STN LCD is monochrome.
This bit has no meaning in TFT mode.
0x0
5
LCDTFT
LCD panel TFT type selection.
0 = LCD is an STN display. Use gray scaler.
1 = LCD is a TFT display. Do not use gray scaler.
0x0
6
LCDMONO8
Monochrome LCD interface width.
This bit controls whether a monochrome STN LCD uses a 4 or
8-bit parallel interface. It has no meaning in other modes and
must be programmed to zero.
0 = monochrome LCD uses a 4-bit interface.
1 = monochrome LCD uses a 8-bit interface.
0x0