MPR084QR2 Freescale Semiconductor, MPR084QR2 Datasheet - Page 19
![IC CTLR TOUCH SENSOR PROX 16-QFN](/photos/38/65/386548/qfn-16_sml.jpg)
MPR084QR2
Manufacturer Part Number
MPR084QR2
Description
IC CTLR TOUCH SENSOR PROX 16-QFN
Manufacturer
Freescale Semiconductor
Type
Capacitiver
Datasheet
1.MPR084EJ.pdf
(40 pages)
Specifications of MPR084QR2
Number Of Inputs/keys
8 Key
Data Interface
I²C, Serial
Voltage - Supply
1.8 V ~ 3.6 V
Current - Supply
1.62mA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-QFN Exposed Pad
Output Type
Voltage
Interface
I²C
Input Type
Logic
Supply Voltage
3.3 V
Dimensions
5 mm L x 5 mm W x 1 mm H
For Use With
KITMPR084EVM - KIT EVAL 8-PAD TOUCH MPR084
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Sensors
Freescale Semiconductor
6
6.1
The MPR084 has three primary methods for reporting data in addition to an IRQ output that is described in Chapter 7. The three
output systems are described in this section.
6.2
The Instantaneous output shows the current status of the user interface. This information is displayed in terms of the current
touched pad position that is touched. Only one touch can be shown at a time.
6.2.1 Touch Pad Status Register
The Touch Pad Status Register is a read only register for determining the current status of the touch pad. The I
of the Touch Pad Status Register is 0x02.
Table 13. Touch Pad Status Register Field Descriptions
Output Mechanisms
Introduction
Instantaneous
Field
E1S
E8S
E7S
E6S
E5S
E4S
E3S
E2S
7
6
5
4
3
2
1
0
Reset:
W
R
E8S
7
0
Electrode 8 Status – The Electrode 8 Status bit shows whether or not electrode 8 is touched.
0 Electrode 8 untouched
1 Electrode 8 touched
Electrode 7 Status – The Electrode 7 Status bit shows whether or not electrode 7 is touched.
0 Electrode 7 untouched
1 Electrode 7 touched
Electrode 6 Status – The Electrode 6 Status bit shows whether or not electrode 6 is touched.
0 Electrode 6 untouched
1 Electrode 6 touched
Electrode 5 Status – The Electrode 5 Status bit shows whether or not electrode 5 is touched.
0 Electrode 5 untouched
1 Electrode 5 touched
Electrode 4 Status – The Electrode 4 Status bit shows whether or not electrode 4 is touched.
0 Electrode 4 untouched
1 Electrode 4 touched
Electrode 3 Status – The Electrode 3 Status bit shows whether or not electrode 3 is touched.
0 Electrode 3 untouched
1 Electrode 3 touched
Electrode 2 Status – The Electrode 2 Status bit shows whether or not electrode 2 is touched.
0 Electrode 2 untouched
1 Electrode 2 touched
Electrode 1 Status – The Electrode 1 Status bit shows whether or not electrode 1 is touched.
0 Electrode 1 untouched
1 Electrode 1 touched
= Unimplemented
E7S
6
0
Figure 22. Touch Pad Status Register
E6S
5
0
E5S
4
0
Description
E4S
3
0
E3S
2
0
E2S
1
0
E1S
0
0
2
C slave address
MPR084
19