Datasheet

PIC18F87K90 FAMILY
DS39957D-page 284  2009-2011 Microchip Technology Inc.
20.3.2.2 Contrast Control
The LCD contrast control circuit consists of a 7-tap
resistor ladder, controlled by the LCDCST bits (see
Figure 20-6.).
FIGURE 20-6: INTERNAL REFERENCE AND CONTRAST CONTROL BLOCK DIAGRAM
LCDCST<2:0>
Analog
RR RR
7 Stages
MUX
To Top of
Reference Ladder
7
0
3
VDD
Internal Reference
Contrast Control