at42qt1040 ATMEL Corporation, at42qt1040 Datasheet - Page 11

• Manufacturer Part Number: at42qt1040
• Description: Qtouch? 4-key Sensor Ic
• Manufacturer: ATMEL Corporation

9524B–AT42–04/09
Table 4-3.
Table 4-4.
Bit 7:
Bits 4 – 6:
Bits 0 – 3:
Figure 4-2
monitored and tweaked to the specific application with great accuracy.
Figure 4-2.
Bit 7
CAL
Byte
to
18
19
20
21
22
23
24
25
26
27
28
29
Figure 4-5
This bit is set during calibration
Contains the number of keys active
Show the touch status of the corresponding keys
Serial Data Output (Continued)
Status Byte (Byte 28)
Byte Clocked Out (~5 µs Period)
Bit 6
Number of Keys (2-4)
show the usefulness of the debug data out feature. Channels can be
Bit 5
Purpose
Delta 0 Low Byte
Delta 0 High Byte
Delta 1 Low Byte
Delta 1 High Byte
Delta 2 Low Byte
Delta 2 High Byte
Delta 3 Low Byte
Delta 3 High Byte
Flags
Flags2
Status Byte
Frame Number
Bit 4
Key 3
Bit 3
Unsigned byte. See
Notes
Signed 16-bit integer
Signed 16-bit integer
Signed 16-bit integer
Signed 16-bit integer
Various operational flags
Unsigned bytes
Repeat of framing index number in
byte 0
Key 2
Bit 2
AT42QT1040
Key 1
Bit 1
Table 4-4
Key 0
Bit 0
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