Datasheet

 2009 Microchip Technology Inc. Preliminary DS41364D-page 327
PIC16F193X/LF193X
26.0 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 PIC16F193X/LF193X
device, the module drives the panels of up to four
commons and up to 24 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:
- 16 (PIC16F1933/1936/1938/
PIC16LF1933/1936/1938)
- 24 (PIC16F1934/1937/1939/
PIC16LF1934/1937/1939)
• Static, 1/2 or 1/3 LCD Bias
FIGURE 26-1: LCD DRIVER MODULE BLOCK DIAGRAM
Note: COM3 and SEG15 share the same physical
pin on the PIC16F1933/1936/1938/
PIC16LF1933/1936/1938, therefore SEG15
is not available when using 1/4 multiplex
displays.
Data Bus
SEG<23:0>
(1, 3)
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.
2: SEG<23:0> on PIC16F1934/1937/1939, SEG<15:0> on PIC16F1933/1936/1938/
PIC16LF1933/1936/1938.
3: COM3 and SEG15 share the same physical pin on the PIC16F1933/1936/1938/PIC16LF1933/1936/1938,
therefore SEG15 is not available when using 1/4 multiplex displays.
COM<3:0>
(3)
Clock Source
Timing Control
Select and
Prescaler
LFINTOSC
FOSC/256
T1OSC
To I/O Pads
(1)
LCDCON
LCDPS
LCDSEn
MUX