AT42QT1070_14 Datasheet, PDF (15/34 Pages) ATMEL Corporation – Seven-channel QTouch Touch Sensor IC

5. Setups
5.1 Introduction
The device calibrates and processes signals using a number of algorithms specifically designed to provide for high
survivability in the face of adverse environmental challenges. User-defined Setups are employed to alter these
algorithms to suit each application. These Setups are loaded into the device over the I²C serial interfaces. In
standalone mode these settings are fixed to predetermined values.
Table 5-1. Internal Register Address Allocation
Address Use
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
0 Chip ID
Major ID (= 2)
Minor ID (= E)
1 Firmware Version
Firmware version number
2 Detection status CALIBRATE OVERFLOW
–
–
–
–
–
3 Key status
Reserved
Key 6
Key 5
Key 4
Key 3
Key 2
Key 1
4 – 5 Key signal 0
Key signal 0 (MSByte) – Key signal 0 (LSByte)
6 – 7 Key signal 1
Key signal 1 (MSByte) – Key signal 1 (LSByte)
8 – 9 Key signal 2
Key signal 2 (MSByte) – Key signal 2 (LSByte)
10 – 11 Key signal 3
Key signal 3 (MSByte) – Key signal 3 (LSByte)
12 – 13 Key signal 4
Key signal 4 (MSByte) – Key signal 4 (LSByte)
14 – 15 Key signal 5
Key signal 5 (MSByte) – Key signal 5 (LSByte)
16 – 17 Key signal 6
Key signal 6 (MSByte) – Key signal 6 (LSByte)
18 – 19 Reference data 0
Reference data 0 (MSByte) – Reference data 0 (LSByte)
20 – 21 Reference data 1
Reference data 1 (MSByte) – Reference data 1 (LSByte)
22 – 23 Reference data 2
Reference data 2 (MSByte) – Reference data 2 (LSByte)
24 – 25 Reference data 3
Reference data 3 (MSByte) – Reference data 3 (LSByte)
26 – 27 Reference data 4
Reference data 4 (MSByte) – Reference data 4 (LSByte)
28 – 29 Reference data 5
Reference data 5 (MSByte) – Reference data 5 (LSByte)
30 – 31 Reference data 6
Reference data 6 (MSByte) – Reference data 6 (LSByte)
32 NTHR key 0
Negative Threshold level for key 0
33 NTHR key 1
Negative Threshold level for key 1
34 NTHR key 2
Negative Threshold level for key 2
35 NTHR key 3
Negative Threshold level for key 3
36 NTHR key 4
Negative Threshold level for key 4
37 NTHR key 5
Negative Threshold level for key 5
38 NTHR key 6
Negative Threshold level for key 6
39 AVE/AKS key 0
Adjacent key suppression level for key 0
40 AVE/AKS key 1
Adjacent key suppression level for key 1
Bit 0
R/W
R
R
TOUCH R
Key 0 R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
AT42QT1070 [DATASHEET]
15
9596C–AT42–05/2013