mpr084 Freescale Semiconductor, Inc, mpr084 Datasheet - Page 12

• Manufacturer Part Number: mpr084
• Description: Proximity Capacitive Touch Sensor Controller
• Manufacturer: Freescale Semiconductor, Inc

MPR084
12
3.6
The Maximum Number of Touched Positions Register adjusts the number of keys that can be concurrently reported as touched.
The I
3.7
The Electrode Channel Mask Register adjusts to the number of keys that are scanned by the MPR084. The I
of the Electrode Channel Mask Register is 0x0C.
2
C slave address of the Maximum Number of Touched Positions Register is 0x0D.
Table 6. Maximum Number of Touched Positions Register Field Descriptions
Table 7. Electrode Channel Enable Mask Register Field Descriptions
Maximum Number of Touched Positions Register
Electrode Channel Enable Mask Register
Reset:
Reset:
E8EN
E7EN
E6EN
E5EN
Field
Field
TPC
2:0
W
W
7
6
5
4
R
R
E8EN
0
1
7
0
7
Figure 16. Maximum Number of Touched Positions Registers
Figure 17. Electrode Channel Enable Mask Position Register
= Unimplemented
= Unimplemented
Touched Positions Count – The Touched Positions Count selects or reports the
number of simultaneously reported touches.
000 Encoding 0 – Sets the number of allowed touches to 0
~
111 Encoding 7 – Sets the number of allowed touches to 7
Electrode 8 Enable – The Electrode 8 Enable bit enables or disables electrode
number 8.
0 Electrode 8 Disable
1 Electrode 8 Enable
Electrode 7 Enable – The Electrode 7 Enable bit enables or disables electrode
number 7.
0 Electrode 7 Disable
1 Electrode 7 Enable
Electrode 6 Enable – The Electrode 6 Enable bit enables or disables electrode
number 6.
0 Electrode 6 Disable
1 Electrode 6 Enable
Electrode 5 Enable – The Electrode 5 Enable bit enables or disables electrode
number 5.
0 Electrode 5 Disable
1 Electrode 5 Enable
E7EN
6
0
0
6
1
E6EN
5
0
0
5
1
E5EN
4
0
0
4
1
Description
Description
E4EN
3
0
0
3
1
E3EN
2
1
2
1
E2EN
TPC
1
0
1
1
Freescale Semiconductor
E1EN
2
0
0
0
1
C slave address
Sensors