This example demonstrates the hysteresis feature of the AC peripheral that helps in
avoiding frequent toggling of the AC when the positive input oscillates very close to
the negative input level. This application is similar to the voltage level detector
application, but additionally it has the Hysteresis mode enabled.
Figure 4-1. Analog Comparator Response With
and Without Hysteresis Enabled
Configure the hysteresis by writing to the Hysteresis Mode Select (HYSMODE[1:0]) bit
field in the Control A register:Figure 4-2. AC0.CTRLA - Configure
Hysteresis ModeA medium hysteresis is used (25 mV), which translates in the following sequence of
code:
AC0.CTRLA |= AC_HYSMODE_25mV_gc;
Tip: The full code example is also
available in the Appendix section.
An MCC generated code example for AVR128DA48 with the same functionality as the one
described in this section can be found here:
The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.
