PIC16F527 Datasheet, PDF (9/12 Pages) Microchip Technology – 8-bit PIC® Microcontrollers

PIC Microcontrollers with LCD
Segemented Displays
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
■ Integrated voltage bias generation
■ Direct drive for both 3V and 5V powered displays
■ Software contrast control for boosting or dimming for
different temperature or lighting conditions
■ Drive LCD while conserving power in Sleep mode
■ Integrated real time clock and calendar for displaying
time and date information
■ mTouch capacitive touch sensing capability
■ Crystal-free USB 2.0 options
Direct Drive for Segmented Displays
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, giving you the
flexibility to work with many different glass vendors.
Contrast Control
Software contrast control is a key feature using firmware
to either boost or dim the contrast of the display. Boost
the contrast up to VDD or beyond if you are using one
of the MCUs with an integrated charge pump. Software
contrast control allows you 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
producing a crisp image on the display.
Featured LCD Product Families
Development Tools
PICDEM LCD 2 Demo Board (DM163030)
■ Illustrates and supports the main
features of Microchip’s 28-, 40-, 64-
and 80-pin LCD PIC microcontrollers
■ LCD glass with icons, numbers,
alphanumeric and starburst display
■ Separate Processor Plug-in Modules (PIMs) are
available to evaluate all of the LCD products
■ Booster capability for contrast control and dimming
LCD Explorer Development Board (DM240314)
■ Supports PIC24 and PIC18 LCD PIC
MCUs with XLP technology
■ Current measurement terminals,
mTouch sensing solutions and
expansion connector
■ Eight common LCD glass types
■ Supports 1/3 biasing
■ CTMU switch to showcase touch sensing
■ Four switches implemented for software demonstration
■ Power the board using 9V power supply, USB connector, two
AAA batteries or connector for VBAT current measurement
PIC18F97J94 PIM Demo Board (MA180034)
■ Features 100-pin PIC18F97J94 for evaluation
of all 100-, 80- and 64-pin PIC18F97J94
LCD/USB/General Purpose MCUs
■ Plugs into LCD Explorer Board
(DM240314) for additional functionality
■ Contains code examples
Superset Device Pins
Flash
Max Voltage
(KB) Segments (V)
Additional Features
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, I²C™, SPI, Comparators
PIC18F87K90 ^{64–80 32–128 192 1.8–5.5 10-bit ADC, EEPROM, I2C, SPI, RTCC, Comparators, ECCP}
PIC18F97J94 ^{64–100 32–128 480}
2–3.6
Crystal-free USB, VBAT, 12-bit ADC, ECCP, EUSART, I²C, SPI,
Comparators
www.microchip.com/lcd
8-bit PIC®Microcontroller Solutions 9