Datasheet

 2010-2012 Microchip Technology Inc. DS41414D-page 335
PIC16(L)F1946/47
27.0 LIQUID CRYSTAL DISPLAY
(LCD) DRIVER MODULE
The Liquid Crystal Display (LCD) driver module
generates the timing control to drive a static or
multiplexed LCD panel. In the PIC16(L)F1946/47
device, the module drives the panels of up to four
commons and up to 46 segments. The LCD module
also provides control of the LCD pixel data.
The LCD driver module supports:
• Direct driving of LCD panel
• Three LCD clock sources with selectable prescaler
• Up to four common pins:
- Static (1 common)
- 1/2 multiplex (2 commons)
- 1/3 multiplex (3 commons)
- 1/4 multiplex (4 commons)
• Segment pins up to:
- 64 (PIC16(L)F1946/47)
• Static, 1/2 or 1/3 LCD Bias
27.1 LCD Registers
The module contains the following registers:
• LCD Control register (LCDCON)
• LCD Phase register (LCDPS)
• LCD Reference Ladder register (LCDRL)
• LCD Contrast Control register (LCDCST)
• LCD Reference Voltage Control register
(LCDREF)
• Up to 6 LCD Segment Enable registers (LCDSEn)
• Up to 24 LCD data registers (LCDDATAn)
FIGURE 27-1: LCD DRIVER MODULE BLOCK DIAGRAM
Data Bus
SEG<23:0>
To I/O Pads
(1)
LCDDATAx
Registers
Note 1: These are not directly connected to the I/O pads, but may be tri-stated, depending on the configuration of
the LCD module.
COM<3:0>
Clock Source
Timing Control
Select and
Prescaler
LFINTOSC
FOSC/256
T1OSC
To I/O Pads
(1)
LCDCON
LCDPS
LCDSEn
MUX