CAT Module Pin Name
CSA0
CSB0
CSA1
CSB1
CSA2
CSB2
CSA3
CSB3
CSA4
CSB4
CSA5
CSB5
CSA6
CSB6
CSA7
CSB7
CSA8
CSB8
CSA9
CSB9
CSA10
CSB10
CSA11
CSB11
CSA12
CSB12
CSA13
CSB13
CSA14
CSB14
CSA15
CSB15
CSA16
CSB16
QTouch method Pin Name
SNS0
SNSK0
SNS1
SNSK1
SNS2
SNSK2
SNS3
SNSK3
SNS4
SNSK4
SNS5
SNSK5
SNS6
SNSK6
SNS7
SNSK7
SNS8
SNSK8
SNS9
SNSK9
SNS10
SNSK10
SNS11
SNSK11
SNS12
SNSK12
SNS13
SNSK13
SNS14
SNSK14
SNS15
SNSK15
SNS16
SNSK16
Table 11 QTouch Resistive drive pin option
(The rows marked with Grey indicate that Resistive Drive option is not available on that pin.)
6.3.8.2
QTouch Group A/B method Schematic for UC3L
6.3.8.2.1
Resistive Drive option
The cases A and B of the Figure provide the schematic arrangement of QTouch Group A/B and
Autonomous QTouch Sensors. In option A, Resistive drive is enabled on SNSK line. In case B,
Resistive drive is disabled on the SNSK line and in this case, it is recommended to use 1kOhm
resistors on SNSK Line external to the UC3L device.
6.3.8.2.2
SYNC pin option
In order to prevent interference from the 50 or 60 Hz mains line the CAT can optionally trigger
QTouch Group A/B and Autonomous QTouch acquisition on the external SYNC input signal. The
SYNC signal should be derived from the mains line and the acquisition will trigger on a falling
edge of this signal. The SYNC pin usage in the Internal Discharge mode scenario is shown in
case C. For QTouch method SYNC pin options Refer to Section 6.3.15.2.13 .
125
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