Microchip Technology DM163030 Data Sheet

8-bit PIC® Microcontroller Solutions

   

■  

Illustrates and supports the main 

features of Microchip’s 28-, 40-, 64- 

and 80-pin LCD PIC microcontrollers

   

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 LCD glass with icons, numbers, 

alphanumeric and starburst display

   

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Separate Processor Plug-in Modules (PIMs) are 

available to evaluate all of the LCD products

   

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Booster capability for contrast control and dimming

   

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 Supports PIC24 & PIC18 LCD PIC 

MCUs with XLP technology

   

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 Current measurement terminals, 

mTouch sensing solutions & 

expansion connector

   

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Eight common LCD glass

   

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Support 1/3 biasing

   

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CTMU switch to showcase touch sensing

   

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Four switches implemented for software demonstration

   

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Power the board using 9V power supply, USB connector, two 

AAA batteries or Connector for V

BAT

 current measurement

   

■

 Features 100-pin PIC18F97J94 for evaluation 

of all 100-, 80- and 64-pin PIC18F97J94 

LCD/USB/General Purpose MCUs

   

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 Plugs into LCD Explorer Board 

(DM240314) for additional functionality

   

■

Contains code examples

Segmented displays are used in a wide variety of 

applications, ranging from meters to portable medical 

devices to thermostats to exercise equipment. PIC MCUs 

with integrated LCD drivers can directly drive segmented 

displays with letters, numbers, characters and icons. The 

main features of Microchip’s LCD portfolio include:

   

■

Flexible LCD segments
•    28 pins: up to 72 segments
•    44 pins: up to 116 segments
•    64 pins: up to 184 segments
•    80 pins: up to 192 segments
•    100 pins: up to 480 segments

   

■

Variable clock inputs 

   

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Integrated voltage bias generation

   

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Direct drive for both 3V and 5V powered displays

   

■

Software contrast control for boosting or dimming for 

different temperature or lighting conditions

   

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Drive LCD while conserving power in Sleep mode

   

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Integrated real time clock and calendar for displaying 

time and date information

   

■

mTouch capacitive touch sensing capability

   

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Crystal-free USB 2.0 options

The LCD PIC microcontrollers support direct LCD panel 

drive capability with no external components needed, 

lowering total system cost. They have integrated voltage 

bias generation which allows the MCU to generate the 

different voltage levels that are required to drive the LCD 

segment pins and provide good contrast for the display. 

The LCD MCUs support a range of fixed and variable bias 

options as well as variable clock inputs that enable the 

flexibility to work with many different glass vendors.

Software contrast control is a key feature using firmware to 

either boost or dim the contrast of the display. Boost the 

contrast up to V

DD

 or beyond if you are using one of the 

MCUs with an integrated charge pump. Software contrast 

control allows the designer to vary the contrast on the 

LCD to account for different operating conditions such as 

temperature, lighting, and humidity. Also, software contrast 

control can be invaluable for portable applications. As the 

battery level starts to drop, the firmware can apply a boost 

to the contrast helping extend the battery life while still 

seeing a crisp image on the display.

 PIC16LF1907

28–40

3.5–14

116

1.8–3.6

10-bit ADC, EUSART

 PIC16(L)F1947

28–64

7–28

184

1.8–5.5

10-bit ADC, EEPROM, I

2

C

™, SPI, Comparators

 PIC18F87K90

64–80

32–128

192

1.8–5.5

10-bit ADC, EEPROM, I

2

C, SPI, RTCC, Comparators, ECCP

 PIC18F97J94

64–100

32–128

480

2–3.6

Crystal-free USB, V

BAT

, 12-bit ADC, ECCP, UART, I

2

C, SPI, Comparators