PIC16F1933_11 Datasheet, PDF (315/430 Pages) Microchip Technology – 28-Pin Flash-Based, 8-Bit CMOS Microcontrollers LCD Driver and nanoWatt XLP Technology

PIC16(L)F1933
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)F1933 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 (PIC16(L)F1933)
• Static, 1/2 or 1/3 LCD Bias
Note:
COM3 and SEG15 share the same physical
pin on the PIC16(L)F1933, therefore
SEG15 is not available when using 1/4 mul-
tiplex displays.
FIGURE 27-1:
LCD DRIVER MODULE BLOCK DIAGRAM
Data Bus
LCDDATAx
Registers
MUX
SEG<15:0>^{(1, 2)}
To I/O Pads⁽¹⁾
Timing Control
LCDCON
LCDPS
LCDSEn
COM<3:0>⁽²⁾
To I/O Pads⁽¹⁾
FOSC/256
T1OSC
LFINTOSC
Clock Source
Select and
Prescaler
Note 1:
2:
These are not directly connected to the I/O pads, but may be tri-stated, depending on the configuration of
the LCD module.
COM3 and SEG15 share the same physical pin on the PIC16(L)F1933, therefore SEG15 is not available
when using 1/4 multiplex displays.
 2011 Microchip Technology Inc.
Preliminary
DS41575A-page 315