37.14.2 Device Variant B,C and D

V_CC = 3.3C and f_CPU = 48 MHz for the following PTC measurements.

Note:

Note:

Analog Gain is a parameter of the QTouch Library. Refer to the QTouch Library Peripheral Touch Controller User Guide.
GAIN_16 and GAIN_32 settings are not recommended, otherwise the PTC measurements might get unstable.

The values in the Power Consumption table below are measured values of power consumption under the following conditions:

Operating conditions

VDD = 3.3 V

Clocks

OSC8M used as main clock source, running undivided at 8MHz

CPU is running on flash with 0 wait states, at 8MHz

PTC running at 4MHz

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 (wakeup) the CPU to perform PTC scans. PTC drift calibration is performed every 1.5 sec.