Microchip Technology DM240015 Data Sheet

 2012-2013 Microchip Technology Inc.

DS30009312B-page 315

The Liquid Crystal Display (LCD) controller generates
the data and timing control required to directly drive a
static or multiplexed LCD panel. In 100-pin devices
(PIC24FJXXXGC010), the module can drive panels of
up to eight commons and up to 59 segments when 5 to
8 commons are used, or up to 63 segments when 1 to
4 commons are used.

The module has these features:
• Direct driving of LCD panel
• Three LCD clock sources with selectable prescaler
• Up to eight commons:

- Static (one common)
- 1/2 multiplex (two commons)
- 1/3 multiplex (three commons)
- 1/8 multiplex (eight commons)

• Ability to drive from 29 (in 64-pin devices) to 

63 (100/121-pin) segments, depending on the 
Multiplexing mode selected

• Static, 1/2 or 1/3 LCD bias
• On-chip bias generator with dedicated charge 

pump to support a range of fixed and variable bias 
options

• Internal resistors for bias voltage generation
• Software contrast control for LCD using internal 

biasing

A simplified block diagram of the module is shown in

This data sheet summarizes the features
of the PIC24FJ128GC010 family of
devices. It is not intended to be a compre-
hensive reference source. To complement
the information in this data sheet, refer to
the  “PIC24F Family Reference Manual”,
“Liquid Crystal Display (LCD)”
(DS39740) which is available from the
Microchip web site (

www.microchip.com

).

COM<7:0>

Data Bus

SOSC

FRC Oscillator

LPRC Oscillator

512

to

64

MUX

SEG<62:0>

To I/O Pins

32 x 16 (= 8 x 64)

LCDDATA0

LCDDATA1

LCDDATA30

LCDDATA31

LCD

Charge Pump

64

8

Bias

Voltage

16

(Secondary Oscillator)

Resistor Ladder

LCDREF

LCDREG

LCDCON

LCDPS

LCDSEx