MPR031EPR2 Freescale, MPR031EPR2 Datasheet - Page 10

• Manufacturer Part Number: MPR031EPR2
• Manufacturer: Freescale

Specifications of MPR031EPR2

• Lead Free Status / RoHS Status: Compliant

MPR03X
10
4.3
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
4.4
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
4.5
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.
1
2
3
1
2
3
Run1 Mode
Run2 Mode
Electrode Configuration Register
ELE0
ELE1
ELE2
ELE0
ELE1
ELE2
Reset:
W
R
Run2 Mode to 3 Pads
Run1 Mode with 3 Electrodes
Measurement
Capacitance
Measurement
Capacitance
Figure 15. Electrode/Pad Connections in Area Detection Mode
Engine
Engine
7
0
0
1
Figure 14. Electrode/Pad Connections in Run Mode
ELE0
Figure 16. Electrode Configuration Register
= Unimplemented
CalLock
INT
6
0
Detection
Detection
Filters
Touch
Filters
Touch
and
and
ModeSel
5
0
Measurement
Run1 Mode with 1 Electrode
Capacitance
Engine
4
0
Interrupt
1
2
3
0
1
2
ELE1
ELE0
INT
ELE1
ELE0
Detection
INT
Filters
Touch
and
2
0
EleEn
Run2 Mode to 2 Pads
Measurement
Capacitance
Engine
Measurement
Run1 Mode with 2 Electrodes
Capacitance
(Figure
1
0
Engine
Interrupt
Interrupt
15).
Freescale Semiconductor
0
0
(Figure
Detection
Touch
Filters
and
Detection
Filters
Touch
and
14).
Sensors