Datasheet

6
Microchip Human Interface Solutions
mTouch Sensing Solutions: Touch Screen Controllers
www.microchip.com/mtouch
Implementation of Projected Capacitive Touch
PIC18F/24F/32
Projected Touch Firmware
multi-touch
Application Code
such as
Comms, etc.
ADC
I
2
C™,
UART
CTMU or CVD Acquisition
I/O for
Column Drive
ADC Channels
for Row Sensing
x01
. . .
x11 x12
y01
.
.
.
y08
y09
Diamond Pattern
(alternative pattern types also supported)
Projected Capacitive Technology
Microchip’s projected capacitive technology is the first in
a series of patent-pending releases supporting projected
capacitive touch screen solutions across the portfolio of
8-, 16- and 32-bit PIC MCUs. Microchip makes it easy for
designers to integrate Projected Capacitive interfaces with
flexible, royalty-free source code and software support
tools, to enable fast time to market.
How Projected Capacitive Words
■ One or two thin layers of glass patterned with
conductive coating, typically Indium Tin Oxide (ITO)
■ Screen is confi gured as rows and columns
■ Point of contact identifi ed by change in capacitance
of row and column cells
Development Tools for Projected
Capacitive Touch
Projected Capacitive Development Kit (DM160211)
■ Multi-touch support
• Enables gesture navigation
for intelligent control
■ High fl exibility
• Royalty-free source code
license
• Integrate touch sensing with application code on a
single MCU
■ Low power
• Also available on XLP devices
■ Low cost solution
Applications
■ Embedded systems
■ Appliances
■ Automotive, GPS and navigation devices
■
Gaming, consumer electronics, mobile devices
■ Security control panels
■ Remote controls
■ Thermostats