48.6.7 Peripheral Touch Controller (PTC) Characteristics
Power Consumption
The values provided in the table below are measured values of power consumption, and the values are based on these conditions:
Operating Conditions
- VDD = 3.3V
Clocks
- OSC16M divided to 4 MHz used as main clock source
- CPU is running on Flash with 0 wait state, at 4 MHz
- PTC Acquisition Clock (FPTC_ACQ) at 4 MHz
- Voltage Regulator mode: LPEFF-enabled
PTC Configuration
- Mutual-Capacitance mode
- One touch channel
System Configuration
- Standby Sleep mode enabled
- RTC running on OSCULP32K: used to define the PTC scan rate, through the event system
- Drift Calibration disabled: no interrupts, PTC scans are performed in Standby mode
- Drift Calibration enabled: RTC interrupts (wake up) the CPU to perform PTC scans. PTC drift calibration is performed every 1.5 seconds.
| Symbol | Parameters | Drift Calibration | PTC scan rate (msec) | Oversamples | Ta | Typ. | Max. | Units |
|---|---|---|---|---|---|---|---|---|
| IDD | Current Consumption | Disabled | 10 | 4 | Max 125°C, Typ 25°C | 6.2 | 292.0 | µA |
| 16 | 12.7 | 300.5 | ||||||
| 50 | 4 | 2.3 | 286.1 | |||||
| 16 | 3.7 | 290.3 | ||||||
| 100 | 4 | 1.7 | 286.1 | |||||
| 16 | 2.4 | 286.2 | ||||||
| 200 | 4 | 1.4 | 285.5 | |||||
| 16 | 1.8 | 286.2 | ||||||
| Enabled | 10 | 4 | 8.3 | 293.9 | ||||
| 16 | 14.2 | 304.9 | ||||||
| 50 | 4 | 3.0 | 289.2 | |||||
| 16 | 4.8 | 290.5 | ||||||
| 100 | 4 | 2.3 | 289.2 | |||||
| 16 | 2.8 | 289.5 | ||||||
| 200 | 4 | 1.9 | 287.9 | |||||
| 16 | 2.4 | 289.0 |
Note:
- These values are based on characterization, and are not covered in test limits in the production.