MTCH6301-ISLASHML datasheet(3/32 Pages) MICROCHIP

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 2012 Microchip Technology Inc.

DS41663A-page 3

MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER

1.0

SYSTEM BLOCK DIAGRAM

The MTCH6301 is a turnkey projected capacitive touch

controller that allows easy integration of multitouch and

gestures to create a rich user interface in your design.

Through a sophisticated combination of Self and

Mutual Capacitive scanning for both XY screens and

touch pads, the MTCH6301 allows designers to quickly

and easily integrate projected capacitive touch into

their application.

The Projected Capacitive Configuration Utility with an

autotune feature allows fast customization for different

sizes and top layer thicknesses.

For further customization, designers can also get

access to the firmware library to optimize and improve

designs as needed.

FIGURE 1-1:

BLOCK DIAGRAM

2.0

CONFIGURATION AND SETUP

The MTCH6301 is pre-configured for a 12 Receiver

(RX)/9 Transmitter (TX) touch sensor, mapped as

shown in Section 4.0 “Layout”. While the device will

work out of the box using this specific sensor configu-

ration, most applications will require additional configu-

ration and sensor tuning to determine the correct set of

parameters to be used in the final application.

Microchip provides a PC-based configuration tool for

this purpose, available in the mTouch™ Sensing Solu-

tion Design Center (www.microchip.com/mtouch). Use

of this tool requires a PICkit™ Serial Analyzer (updated

with MTCH6301 support), as well as access to the I2C

communications bus of the MTCH6301.

Once the development process is complete, these

modified parameters must either be written perma-

nently to the controller (via NVRAM, refer to

Section 7.3 “Non-Volatile RAM (NVRAM)”

), or alter-

natively can be sent every time the system is powered

on. Either the PICkit Serial Analyzer or the Master I2C

Controller can be used for this purpose.

Touch Sensor

TX0..17

RX0..12

User Configuration Data

Gesture Engine

MultiTouch

Decode

2C™

Module

TX Drive

Sense

ADC

MTCH6301

[Master Controller]

Touch Data

MICROCHIP

PICkit™ Serial

Analyzer

USB

Connection only for initial tuning or configuration

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