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MPR121 数据表(PDF) 35 Page - Freescale Semiconductor, Inc

部件名 MPR121
功能描述  Proximity Capactive touch Senosr controller
PDF  57 Pages
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制造商  FREESCALE [Freescale Semiconductor, Inc]
网页  http://www.freescale.com
标志 FREESCALE - Freescale Semiconductor, Inc

MPR121 数据表(HTML) 35 Page - Freescale Semiconductor, Inc

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MPR121
Sensors
Freescale Semiconductor
35
TOUCH STATUS REGISTER 1
Figure 39. Touch Status Register1
FILTER DATA HIGH
.
Figure 40. Filtered Data High Register
7
6
543210
ROVCF
0
0
EPROXS
E11S
E10S
E9S
E8S
W
Reset:
0
0
000000
= Unimplemented
Table 27. Touch Status Register 1 Field Descriptions
Field
Description
7
OVCF
Over Current Flag – The Over Current Flag will be set any time the wrong value of
Rext is connected to the MPR121’s Rext pin. This is to protect the part from high
current that could result from an incorrect resistor value.
0 – Correct Rext resistor value
1 – Incorrect Rext resistor value
4
EPROXS
Electrode PROX Status – The Electrode PROX Status bit shows touched nor not
touched.
0 – Not Touched
1 – Touched
3
E11S
Electrode 11 Status – The Electrode 11 Status bit shows touched or not touched.
0 – Not Touched
1 – Touched
2
E10S
Electrode 10 Status – The Electrode 10 Status bit shows touched or not touched.
0 – Not Touched
1 – Touched
1
E9S
Electrode 9 Status – The Electrode 9 Status bit shows touched or not touched.
0 – Not Touched
1 – Touched
0
E8S
Electrode 8 Status – The Electrode 8 Status bit shows touched or not touched.
0 – Not Touched
1 – Touched
7
6
543210
R
0
0
0000
FDHB
W
Reset:
0
0
000000
= Unimplemented
Table 28. Filtered Data High Register Field Descriptions
Field
Description
7:0
FDHB
Filtered Data High Bits – The Filtered Data High Bits displays the higher 2 bits of
the 10 bit filtered A/D reading.
00 Encoding 0
~
11 Encoding 3



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