47.4.8 PTC Characteristics
| Symbol | Mode | PTC channel | Max. | Units |
|---|---|---|---|---|
| Cload | Self-capacitance | Y0 | 16 | pF |
| Cload | Self-capacitance | Y1 | 24 | pF |
| Y2 | ||||
| Y3 | ||||
| Y4 | ||||
| Y5 | ||||
| Y6 | ||||
| Y7 | ||||
| Y8 | ||||
| Y9 | ||||
| Y10 | ||||
| Y11 | ||||
| Y12 | ||||
| Y13 | ||||
| Y14 | ||||
| Y15 | ||||
| Y16 | ||||
| Y17 | ||||
| Y18 | ||||
| Y19 | ||||
| Y20 | ||||
| Y21 | ||||
| Y22 | ||||
| Cload | Self-capacitance | Y23 | 22 | pF |
| Y24 | ||||
| Cload | Self-capacitance | Y25 | 24 | pF |
| Y26 | ||||
| Y27 | ||||
| Y28 | ||||
| Y29 | ||||
| Y30 | ||||
| Y31 | ||||
| Cload | Mutual-capacitance | All | 31 | pF |
Note:
- Capacitance load that the PTC circuitry can compensate for each channel.
PTC Power Consumption
The values given in the table below are measured values of power consumption under the following conditions:
- Operating conditions
- VDD = 5.0V
- Clocks
- OSC48M used as main clock source, running undivided at 48 MHz
- CPU is running on Flash with 2 wait states at 48 MHz
- PTC running at 4 MHz
- PTC configuration
- Mutual-Capacitance mode
- One-touch channel
- System configuration
- Standby Sleep mode enabled
- RTC running on ULP32K: 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 sec.
| Symbol | Parameters | Drift Calibration | PTC scan rate | Oversamples | Ta | Typ. | Max. | Units |
|---|---|---|---|---|---|---|---|---|
| IDD | Current Consumption | Disabled | 10 | 4 | Max. 105°C Typ. 25°C | 24 | 609 | µA |
| 16 | 43 | 633 | ||||||
| 50 | 4 | 17 | 602 | |||||
| 16 | 22 | 608 | ||||||
| 100 | 4 | 16 | 601 | |||||
| 16 | 19 | 605 | ||||||
| 200 | 4 | 16 | 601 | |||||
| 16 | 17 | 603 | ||||||
| Enabled | 10 | 4 | 30 | 620 | ||||
| 16 | 50 | 644 | ||||||
| 50 | 4 | 20 | 607 | |||||
| 16 | 24 | 612 | ||||||
| 100 | 4 | 18 | 606 | |||||
| 16 | 21 | 608 | ||||||
| 200 | 4 | 17 | 605 | |||||
| 16 | 19 | 607 |
Note:
- These values are based on characterization.