Datasheet

9596A–AT42–10/10

AT42QT1070

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 I

C-compatible serial interfaces. In standalone 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 Bit 0 R/W

0 Chip ID Major ID (= 2) Minor ID (= E) R

1 Firmware Version Firmware version number R

2 Detection status

CALIBRATE OVERFLOW

–––––TOUCHR

3Key status ReservedKey 6Key 5Key 4Key 3Key 2Key 1Key 0 R

4 – 5 Key signal 0 Key signal 0 (MSByte) – Key signal 0 (LSByte) R

6 – 7 Key signal 1 Key signal 1 (MSByte) – Key signal 1 (LSByte) R

8 – 9 Key signal 2 Key signal 2 (MSByte) – Key signal 2 (LSByte) R

10 – 11 Key signal 3 Key signal 3 (MSByte) – Key signal 3 (LSByte) R

12 – 13 Key signal 4 Key signal 4 (MSByte) – Key signal 4 (LSByte) R

14 – 15 Key signal 5 Key signal 5 (MSByte) – Key signal 5 (LSByte) R

16 – 17 Key signal 6 Key signal 6 (MSByte) – Key signal 6 (LSByte) R

18 – 19 Reference data 0 Reference data 0 (MSByte) – Reference data 0 (LSByte) R

20 – 21 Reference data 1 Reference data 1 (MSByte) – Reference data 1 (LSByte) R

22 – 23 Reference data 2 Reference data 2 (MSByte) – Reference data 2 (LSByte) R

24 – 25 Reference data 3 Reference data 3 (MSByte) – Reference data 3 (LSByte) R

26 – 27 Reference data 4 Reference data 4 (MSByte) – Reference data 4 (LSByte) R

28 – 29 Reference data 5 Reference data 5 (MSByte) – Reference data 5 (LSByte) R

30 – 31 Reference data 6 Reference data 6 (MSByte) – Reference data 6 (LSByte) R

32 NTHR key 0 Negative Threshold level for key 0 R/W

33 NTHR key 1 Negative Threshold level for key 1 R/W

34 NTHR key 2 Negative Threshold level for key 2 R/W

35 NTHR key 3 Negative Threshold level for key 3 R/W

36 NTHR key 4 Negative Threshold level for key 4 R/W

37 NTHR key 5 Negative Threshold level for key 5 R/W

38 NTHR key 6 Negative Threshold level for key 6 R/W

39 AVE/AKS key 0 Adjacent key suppression level for key 0 R/W

40 AVE/AKS key 1 Adjacent key suppression level for key 1 R/W

41 AVE/AKS key 2 Adjacent key suppression level for key 2 R/W

42 AVE/AKS key 3 Adjacent key suppression level for key 3 R/W