LH79524/LH79525 User’s Guide Color Liquid Crystal Display Controller
Version 1.0 4-31
4BW
Monochrome STN LCD LCD is Monochrome (Black and White) STN.
This bit has no effect in TFT mode.
1 = STN LCD is monochrome
0 = STN LCD is color
3:1
BPP
LCD Bits-Per-Pixel For the LH79525, 12 bpp is selected by 0b100. See
Table 4-2 and Table 4-3 for 12-bit mapping in the 16-bit frame buffer.
000 = 1 BPP
001 = 2 BPP
010 = 4 BPP
011 = 8 BPP
100 = 16 BPP
101 = Invalid
110 = Invalid
111 = Invalid
0LCDEN
Color LCD Controller Enable LCD displays usually require that their
logic signals be operating before the high voltages are applied to the dis-
play. Thus, the LCDVDDEN output signal is not asserted unless both the
LCDEN and PWR bit fields have been programmed to 1. Most LCD dis-
plays require that the controller be enabled (LCDEN = 1) approximately
20 ms before power is applied to the LCD (PWR = 1). Most LCD displays
also specify that the power-down sequence be the reverse of the power-
up sequence.
1 = Color LCD Controller enabled
0 = Color LCD Controller disabled
Table 4-27. CTRL Fields (Cont’d)
BIT NAME DESCRIPTION
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