Datasheet

35
9502A–AT42–07/08
AT42QT2160
7.26 Address 77: GPIO Wake
If the corresponding bit is set to 1, dedicated GPIO pins set to inputs will still be read during
SLEEP mode (no capacitive sensing carried out). When a change in the state of the inputs is
detected, the CHANGE
line will be triggered and the QT2160 will go back to SLEEP.
Default: 0 (Wake disabled)
7.27 Address 78...79: Common Change Keys
k0...k15: represents the respective keys. If set to 1, the respective key is included in the
common change comparisons.
Note: if no keys are included in the Common Change group, the CC bit is set to 1.
Default: 0 (not included)
7.28 Address 100...163: Signals and References
Addresses 100...131 allow signal data to be read for each key. There are two bytes of data for
each key. These are the key’s 16-bit signal which is accessed as two 8-bit bytes, stored LSB
first.
Addresses 132...163 allow reference data to be read for each key. There are two bytes of data
for each key. These are the key’s 16-bit reference which is accessed as two 8-bit bytes, stored
LSB first.
There are a total of 16 keys and 4 bytes of data per key, yielding a total of 64 addresses. These
addresses are read-only.
Table 7-27. GPIO Wake
Addressb7b6b5b4b3b2b1b0
77 0 0 0 GPIO3 GPIO2 GPIO1 0 0
Table 7-28. Common Change Keys
Addressb7b6b5b4b3b2b1b0
78 k7 k6 k5 k4 k3 k2 k1 k0
79 k15 k14 k13 k12 k11 k10 k9 k8
Table 7-29. Signal and References
Address Key # Use Address Key # Use
100 0 Signal LSB 132 0 Reference LSB
101 0 Signal MSB 133 0 Reference MSB
102 1 Signal LSB 134 1 Reference LSB
103 1 Signal MSB 135 1 Reference MSB
104...131 2...15 136...163 2...15