Freescale Semiconductor Evaluation Board MPR031/2 for 2- or 3-pad touch sensor controllers DEMOMPR031 DEMOMPR031 データシート

Sensors

10

Freescale Semiconductor

In Run1 Mode, the MPR03X monitors 1, 2, or 3 electrodes which are connected to a user defined array of touch pads. When only 
1 or 2 electrodes are selected, the IRQ/ELE2 pin is automatically configured as an open drain interrupt output.

When 3 electrodes are selected in Run1 Mode, the IRQ/ELE2 pin becomes the third electrode input, ELE2 (

).

In Run2 Mode, all enabled electrodes act as a single electrode by internally connecting the electrode pins together. The entire 
surface of all the touch pads is used as a single pad, increasing the total area of the conductor.

When 2 electrodes are selected in Run2 Mode, the IRQ/ELE2 pin is automatically configured as an open drain interrupt output. 
When 3 electrodes are selected, the IRQ/ELE2 pin becomes the third electrode input, ELE2 (

).

The Electrode Configuration Register manages the configuration of the Electrode outputs in addition to the mode of the part. The 
address of the Electrode Configuration Register is 0x44.

7

6

5

4

3

2

1

0

R

0

CalLock

ModeSel

EleEn

W

Reset:

0

0

0

0

0

0

0

0

= Unimplemented

ELE0

ELE1

Capacitance

Measurement

Engine

Filters

and

Touch

Detection

ELE2

3

1

2

INT

Interrupt

ELE1

ELE0

Capacitance

Measurement

Engine

Filters

and

Touch

Detection

1

2

INT

Interrupt

ELE0

Capacitance

Measurement

Engine

Filters

and

Touch

Detection

1

ELE0

ELE1

INT

Capacitance

Measurement

Engine

Filters

and

Touch

Detection

ELE2

Interrupt

3

1

2

ELE1

ELE0

Capacitance

Measurement

Engine

Filters

and

Touch

Detection

1

2