at42qt2160 ATMEL Corporation, at42qt2160 Datasheet - Page 35

• Manufacturer Part Number: at42qt2160
• Description: Qslide?, 16-key Qmatrix? Sensor Ic
• Manufacturer: ATMEL Corporation

7.26
7.27
7.28
9502A–AT42–07/08
Address 77: GPIO Wake
Address 78...79: Common Change Keys
Address 100...163: Signals and References
Table 7-27.
Table 7-28.
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)
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)
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 7-29.
Address
Address
104...131
Address
77
78
79
100
101
102
103
GPIO Wake
Common Change Keys
Signal and References
k15
b7
b7
k7
0
Key #
2...15
0
0
1
1
k14
b6
b6
k6
0
Signal MSB
Signal MSB
Signal LSB
Signal LSB
Use
k13
b5
b5
k5
0
GPIO3
k12
b4
b4
k4
136...163
Address
132
133
134
135
GPIO2
k11
b3
b3
k3
Key #
2...15
GPIO1
0
0
1
1
k10
b2
b2
k2
AT42QT2160
Reference MSB
Reference MSB
Reference LSB
Reference LSB
b1
b1
k1
k9
0
Use
b0
b0
k0
k8
0
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