MTCH6301-ISLASHML datasheet(6/32 Pages) MICROCHIP

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MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER

DS41663A-page 6

 2012 Microchip Technology Inc.

4.0

LAYOUT

4.1

Typical Application Circuit

The following schematic portrays a typical application

circuit, based on a 12RX/9TX touch sensor.

FIGURE 4-1:

TYPICAL APPLICATION CIRCUIT

4.2

Touch Sensor Design

Please refer to the mTouch Sensing Solution design

center at www.microchip.com/mtouch for additional

information regarding design and layout of touch

sensors.

4.3

Sensor Layout Configuration

To properly configure a sensor from a physical layout

standpoint, the following registers must be correctly

configured:

• RX Pin Map/TX Pin Map

• RX Scaling Coefficient/TX Scaling Coefficient

•Flip State

4.3.1

RX/TX PIN MAP

By default, the RX and TX pins are set as shown in the

Typical Application Circuit (Figure 4.1). If you require a

different layout or a different amount of sensor chan-

nels, the RX and TX pins are configured via pin map

arrays. To access these arrays, reference Section 5.0

“Communication Protocol”

and Section 6.0 “Mem-

ory Map”

of this document.

The RX and TX lines are configurable for the purpose

of making trace routing and board layout more conve-

nient. Please note that while RX pins can be used as

TX pins instead, a single pin cannot be used as BOTH

an RX and a TX channel concurrently. The pin maps

are comprised of “Pin Map ID” numbers, which are

shown in Table 4-1.

Master I

2C™

Controller

MTCH6301

TX3

TX2

TX1

TX0

VSS

VDD

RX0

RX1

RX2

RX3

RX4

TX15

TX16

TX17

SDA

TX14

VSS

VCAP

INT

N/C

RX12

RX11

10 µF

0.1 µF

RX0

RX11

GPIO/INT

SCL

SDA

MICROCHIP

PICkit™ Serial

Analyzer

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