Microchip Technology DM160214 Data Sheet

 2010-2012 Microchip Technology Inc.

DS41414D-page 335

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

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)

Data Bus

SEG<23:0>

To I/O Pads

LCDDATAx 

Registers

 

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

F

OSC

/256

T1OSC

To I/O Pads

LCDCON

LCDPS

LCDSEn

MUX