MPR031EPR2 Freescale, MPR031EPR2 Datasheet - Page 12

• Manufacturer Part Number: MPR031EPR2
• Manufacturer: Freescale

Specifications of MPR031EPR2

• Lead Free Status / RoHS Status: Compliant

MPR03X
12
5
5.1
The MPR03X has three outputs: the touch status, values from the second level filter
values. The application can either use the touch status or a combination of second level filter data with the baseline data to
determine when a touch occurs.
5.2
Each Electrode has an associated single bit that denotes whether or not the pad is currently touched. This output is generated
using the touch threshold and release threshold registers to determine when a pad is considered touched or untouched.
Configuration of this system is discussed in
5.2.1
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 6. Touch Pad Status Register Field Descriptions
Output Mechanisms
Introduction
Touch Status
Touch Status Register
Field
OCF
E2S
E1S
E0S
Reset:
7
2
1
0
W
R
OCF
7
0
Over Current Flag – The Over Current Flag shows when too much current is on the REXT
pin. If it is set all other status flags and registers are cleared and the device is set to Stop
mode. When OCF is set, the MPR03X cannot be put back into a Run mode.
0 – Current is within limits.
1 – Current is above limits. Writing a 1 to this field will clear the OCF.
Electrode 2 Status – The Electrode 2 Status bit shows touched or not touched.
0 – Not Touched
1 – Touched
Electrode 1 Status – The Electrode 1 Status bit shows touched or not touched.
0 – Not Touched
1 – Touched
Electrode 0 Status – The Electrode 0 Status bit shows touched or not touched.
0 – Not Touched
1 – Touched
= Unimplemented
6
0
0
Section
Figure 17. Touch Status Register
9.
5
0
0
4
0
0
Description
3
0
0
(Section
E2S
2
0
8.3), and the calibrated baseline
E1S
1
0
Freescale Semiconductor
E0S
0
0
2
C slave address
Sensors