45.10.10.1 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 (wakeup) the CPU to perform PTC scans. PTC drift calibration is performed every 1.5 sec.
Table 45-40. Power Consumption (1)
Symbol Parameters Drift Calibration PTC scan rate Oversamples Ta Typ. Max. Units
IDD Current Consumption Disabled 10 4 Max 85°C Typ 25°C 24 308 µA
16 43 330
50 4 17 301
16 22 307
100 4 16 301
16 19 304
200 4 16 301
16 17 303
Enabled 10 4 30 319
16 50 342
50 4 20 306
16 24 311
100 4 18 305
16 21 308
200 4 17 304
16 19 305
Note:
  1. These values are based on characterization.