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SX8663 Datasheet(PDF) 42 Page - Semtech Corporation

Part # SX8663
Description  Capacitive Button Matrix (up to 36) and Proximity Controller with Individual LED Drivers and Buzzer Output
PDF  64 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SX8663 Datasheet(HTML) 42 Page - Semtech Corporation

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ADVANCED COMMUNICATIONS & SENSING
Rev5 4
th August 2011
© 2011 Semtech Corp.
www.semtech.com
42
SX8663
Capacitive Button Matrix (up to 36) and Proximity Controller
with Individual LED Drivers and Buzzer Output
5.4
Buttons (MK and PK) Parameters
Buttons Parameters
Address
Name
Bits Description
7
Reporting scheme:
0: report both MK and PK touches (multi MK touch is never allowed/reported)
(default)
1: report first/single MK or PK touch (ignore next touch until release of the first
one)
6
Priority key (PK):
0: OFF (default)
1: ON (CAP10 if proximity is enabled, else CAP11)
5:4
Button events to be reported on NIRQ.
00 : None
01 : Touch
10 : Release
11 : Both (default)
3:2
Defines the number of samples at the scan period for determining a release of a
button.
00 : no debounce, use incoming sample (default)
01 : 2 samples debounce
10 : 3 samples debounce
11 : 4 samples debounce
0x22
BtnCfg
1:0
Defines the number of samples at the scan period for determining a touch of a
button.
00 : no debounce, use incoming sample (default)
01 : 2 samples debounce
10 : 3 samples debounce
11 : 4 samples debounce
0x23
BtnAvgThresh
7:0
Defines the positive threshold for disabling the processing filter averaging.
If ticks are above the threshold, then the averaging is suspended.
0x00: 0
0x01: 4
…
0x50: 320 (default)
…
0xFF: 1020
0x24
BtnCompNegThresh
7:0
Defines the negative offset compensation threshold.
0x00: 0
0x01: 4
…
0xA0: 640 (default)
…
0xFF: 1020
0x25
BtnCompNegCntMax
7:0
Defines the number of ticks (below the negative offset compensation threshold)
which will initiate an offset compensation.
0x00: reserved
0x01: 1 sample (default)
…
0xFF: 255 samples
0x26
BtnHysteresis
7:0
Defines the button hysteresis corresponding to a percentage of the CAP
thresholds (defined in Table 12).
All buttons use the same hysteresis.
0x00: 0%
0x01: 1%
…
0x0A: 10% (default)
…



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