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CAP1028 Datasheet(PDF) 41 Page - SMSC Corporation

Part # CAP1028
Description  8 Channel Capacitive Touch Sensor with 2 LED Drivers
PDF  71 Pages
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

CAP1028 Datasheet(HTML) 41 Page - SMSC Corporation

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8 Channel Capacitive Touch Sensor with 2 LED Drivers
Datasheet
SMSC CAP1028
41
Revision 1.1 (08-05-09)
DATASHEET
The Sensor Configuration Register controls timings associated with the Capacitive Sensor channels 1
- 8.
Bits 7 - 4 - MAX_DUR[3:0] - (default 1010b) - Determines the maximum time that a sensor is allowed
to be touched until the Capacitive Touch sensor is recalibrated as shown in Table 5.12.
Bits 3 - 0 - RPT_RATE[3:0] - (default 0100b) Determines the time duration between interrupt assertions
when auto repeat is enabled. The resolution is 35ms the range is from 35ms to 560ms as shown in
Table 5.13.
Table 5.12 MAX_DUR Bit Decode
MAX_DUR[3:0]
TIME BEFORE RECALIBRATION
32
1
0
0
0
0
0
560ms
0
0
0
1
840ms
0
0
1
0
1120ms
0
0
1
1
1400ms
0
1
0
0
1680ms
0
1
0
1
2240ms
0
1
1
0
2800ms
0
1
1
1
3360ms
1
0
0
0
3920ms
1
0
0
1
4480ms
1
0
1
0
5600ms
1
0
1
1
6720ms
1
1
0
0
7840ms
1
1
0
1
8906ms
1
1
1
0
10080ms
1
1
1
1
11200ms
Table 5.13 RPT_RATE Bit Decode
RPT_RATE[3:0] OR M_PRESS[3:0]
INTERRUPT REPEAT RATE
OR M_PRESS TIME
32
1
0
00
0
0
35ms
00
0
1
70ms
0
0
1
0
105ms
0
0
1
1
140ms
0
1
0
0
175ms



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