Charge Transfer; Table 4. Charge Transfer Documentation; Figure 7. Incomplete And Complete Charge Transfert Cycle - ST STM32F0 Series Application Note

Id
UM1913
AN4316
5.3

Charge transfer

The acquisition is based on the measurement of the sensor channel capacitance.
To ensure that the Cx capacitance is correctly charged, it is necessary to monitor the pin connected to the sensor.
On sensors and shield sides, it must observe a complete Charge/Discharge cycle.
In this example , to complete the charge transfer cycles, the following parameter must be modified as below:
• INCREASE:
– htsc.Init.PulseGeneratorPrescaler
– htsc.Init.CTPulseHighLength
– htsc.Init.CTPulseLowLength
• DECREASE:
– Sysclk

Table 4. Charge transfer documentation

transfer.
Id
AN4299
AN4316
AN5105 - Rev 1
Table 3. Signal threshold usage documentation
Title
Developing applications on STM32Cube with
STMTouch® touch sensing library
Tuning a STMTouch-based application
Figure 7. Incomplete and complete charge transfert cycle
gives a list of documents containing information about the charge
Table 4.
Title
Guidelines to improve conducted noise robustness on
STM32F0/F3/L0/L4 series touch sensing applications
Tuning a STMTouch-based application
Debug with STMStudio
Monitoring STMTouch driver variables using
STMStudio
Tuning of the Thresholds
Touchkeys thersholds
Linear and Rotary touch sensors thresholds
Charge transfer documentation
Active shield
Charge transfer period tuning
AN5105
Charge transfer
Chapters
Chapters
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