qt1060 Quantum Research Group, qt1060 Datasheet - Page 16

• Manufacturer Part Number: qt1060
• Description: Qtouch? 6-channel Sensor Ic
• Manufacturer: Quantum Research Group

5.6
5.7
5.8
5.9
16
Address 5: Input Port Status
Address 12: Calibrate
Address 13: Reset
Address 14: Drift Option
AT42QT1060
Table 5-6.
Table 5-7.
Table 5-8.
Table 5-9.
INPUT 0 – 6: these bits indicate the state of the IO lines that are configured as inputs;
1
configured as outputs read as 0.
Writing any nonzero value into this address triggers the device to start a calibration cycle. The
CAL flag in the status register is set when begun and cleared when the calibration has finished.
Writing any nonzero value to this address triggers the device to reset.
DRIFT: there are two types of drift option: normal and relative referencing.
If DRIFT = 0, relative referencing and normal drift are enabled.
If DRIFT = 1, only normal drift is enabled.
Relative referencing compensates for fast signal drifts that are common to all keys. This mode is
suitable if the keys are placed close to each other and have closely matched burst lengths (see
Section 2.11.3 on page
the relative referencing drift rate.
Default: 1 (relative referencing Off)
indicating logic 1 on the input, 0 indicating logic 0. The bits corresponding to any keys
Address
Address
Address
Address
12
13
14
5
Reserved
Input Port Status
Calibrate
Reset
Drift Option
b7
b7
b7
b7
INPUT 6
9). Normal drifting is also carried out but at a slower rate compared to
b6
b6
b6
b6
INPUT 5
Writing a nonzero value forces a calibration
Writing a nonzero value forces a reset
b5
b5
b5
b5
INPUT 4
b4
b4
b4
b4
INPUT 3
b3
b3
b3
b3
INPUT 2
b2
b2
b2
b2
INPUT 1
b1
b1
b1
b1
9505D–AT42–12/08
INPUT 0
DRIFT
b0
b0
b0
b0