Main Characteristics; Description; Signal Threshold; Figure 5. Tsc Characteristics - ST STM32F0 Series Application Note

5

Main characteristics

5.1

Description

The following

Figure 5. TSC characteristics

correlation.
The TSC main characteristics are described in the following pages.
Signal
threshold
Keys
5.2

Signal threshold

To tune the detection thresholds, it must determine the sensitivity of each touchkey. For each touchkey, can be
used few parameters to adjust these signal thresholds.
For debug purpose, it can get touchkey parameters using printf or STMStudio tool:
for (Index = 0;Index < NUMBER_OF_TOUCHKEYS;Index++)
{
printf("K%1d [%2d][%4d %3d %3d %4d] %d %d %d %d %d"
}
Note: ProxInTh and ProxOutTh are defined for proximity detection feature only, when TSLPRM_USE_PROX = 1.
AN5105 - Rev 1
Figure 5.
Charge
Sensitivity Sensor
transfer
Linear Rotary Shield
,Index
,MyTKeys[Index].p_Data->StateId
,MyTKeys[Index].p_ChD->Ref
,MyTKeys[Index].p_ChD->RefRest
,MyTKeys[Index].p_ChD->Delta
,MyTKeys[Index].p_ChD->Meas
,MyTKeys[Index].p_Param->ProxInTh
,MyTKeys[Index].p_Param->ProxOutTh
,MyTKeys[Index].p_Param->DetectInTh
,MyTKeys[Index].p_Param->DetectOutTh
,MyTKeys[Index].p_Param->CalibTh
);
shows all touch sensing controller (TSC) characteristics and their
TSC characteristics
TSC
PCB
Power
Guard ring
supply
AN5105
Main characteristics
Noise
False Noise
Conducted
detection immunity Noise
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