MA180025 Microchip Technology, MA180025 Datasheet - Page 3

• Manufacturer Part Number: MA180025
• Description: MODULE PLUG-IN PIC18F87J90 PIM
• Manufacturer: Microchip Technology
• Series: PIC®r

Specifications of MA180025

• Accessory Type: Plug-In Module (PIM) - PIC18F87J90
• Product: Microcontroller Modules
• Silicon Manufacturer: Microchip
• Core Architecture: PIC
• Core Sub-architecture: PIC18
• Silicon Core Number: PIC18F
• Silicon Family Name: PIC18FxxJxx
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: PICDEM LCD 2 Demonstration Board (DM163030)
• For Use With: DM163030 - KIT DEV PICDEM LCD2
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Touch Sensing
Capacitive Touch vs. Inductive Touch
In addition to the Capacitive Sensing solutions,
Microchip also offers an Inductive Sensing solution.
This gives designers more flexibility to choose the right
touch technology for their application. The table below
can help you decide between Capacitive and Inductive
Touch based on your application requirements.
Capacitive Touch Sensing
Microchip’s Capacitive mTouch Solution offers a
number of PIC MCUs to suit the demands of any
application from the most basic single-button design
using the incredibly small and cost-effective 6-pin
PIC10F to the peripheral rich 8-bit Mid-Range and 16-bit
microcontroller families.
Keys
Slider
Power Consumption
Plastic Front Panel
Glass Front Panel
Metal Front Panel
Waterproof
Outdoor
Gloves
Braille Friendly
Continuous Touch
Soft/Hard Touch
Good
Any MCU or DSC
with Comparator
PIC10F
Comparator
Better
PIC12F
PIC16F
Capacitive
# of Keys
PIC18F
Touch
PIC24F
Best
Inductive
Touch
Basic Principles
A capacitor is simply two electrically isolated
conductors which are in close proximity to one another.
The conductors can be wires, traces on a PCB or even
the iron in the user’s blood.
The capacitive touch sensor is just a copper pad
area, that is capacitively coupled to grounds located
elsewhere in the system creating a parasitic
capacitance. A covering plate material such as
glass is used to provide the user touch surface. The
introduction of the user’s fi nger then produces an
increase in capacitance which will be detected by the
system.
Low Power
In order to detect the capacitance value shift, you
need to constantly scan the keypad, making the
implementation of a low power solution crucial.
Microchip’s mTouch capacitive solution offers very low
power operation, down to less than 10 μA.
How to Choose the Right Capacitive Touch
Solution for Your Application
The application ultimately dictates which solution best
suits your design. For example:
One key or proximity sensor
Up to four keys
More than eight keys with
communication; Low power
< 10 μA
More than 8 keys with
MCU performance, memory
features
www.microchip.com/humaninterface
Requirement
Application
PIC10F204/6
PIC16F610/6,
PIC16F690 Family,
PIC16F88X
PIC16F72X
PIC18F46J11,
PIC18F46J50,
PIC18F87J90,
PIC24F16KA102,
PIC24FJ64GA104/GB004,
PIC24FJ256GA110/GB110
Recommendation
Parts
3