Rainbow Electronics AT42QT1040 - Manual (Page 11)

11
9524A–AT42–03/09
AT42QT1040
Bit 7: This bit is set during calibration
Bits 4 – 6: Contains the number of keys active
Bits 0 – 3: Show the touch status of the corresponding keys
Figure 4-2 to Figure 4-5 show the usefulness of the debug data out feature. Channels can be
monitored and tweaked to the specific application with great accuracy.
Figure 4-2. Byte Clocked Out (~5 µs Period)
18 Delta 0 Low Byte
Signed 16-bit integer
19 Delta 0 High Byte
20 Delta 1 Low Byte
Signed 16-bit integer
21 Delta 1 High Byte
22 Delta 2 Low Byte
Signed 16-bit integer
23 Delta 2 High Byte
24 Delta 3 Low Byte
Signed 16-bit integer
25 Delta 3 High Byte
26 Flags Various operational flags
Unsigned bytes
27 Flags2
28 Status Byte Unsigned byte. See Table 4-4
29 Frame Number
Repeat of framing index number in
byte 0
Table 4-4. Status Byte (Byte 28)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
CAL Number of Keys (2-4) Key 3 Key 2 Key 1 Key 0
Table 4-3. Serial Data Output (Continued)
Byte Purpose Notes