Microchip Technology MA240029 データシート

 2010-2011 Microchip Technology Inc.

DS39996F-page 265

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
(PIC24FJXXXGA310), the module can drive panels of
up to eight commons and up to 60 segments when 5 to
8 commons are used, or up to 64 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 30 (in 64-pin devices) to 

64 (100-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
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”

,

 (DS39740). The information in this

data sheet supersedes the information in
the FRM.

COM<7:0>

Data Bus

SOSC

FRC Oscillator

LPRC Oscillator

512

to

64

MUX

SEG<63:0>

To I/O Pins

32 x 16 (= 8 x 64)

LCDCON

LCDPS

LCDSEx

LCDDATA0

LCDDATA1

LCDDATA30

LCDDATA31

LCD

Charge Pump

64

8

Bias

Voltage

16

(Secondary Oscillator)

Resistor Ladder

LCDREF

LCDREG