Questions on using the power down mode

[nabelekt]

Somewhat related to #161, but not necessarily an issue:

1. From the example in PowerSave.md:

RTC.PITCTRLA = RTC_PERIOD_CYC16384_gc /* RTC Clock Cycles 16384, resulting in 32.768kHz/16384 = 2Hz */

implies to me that the MCU will sleep for ~500ms (wake at 2 Hz).

• Is that the case?
• How can the sleep time be customized?

2. One of the suggested ways of eliminating issues caused by floating pins is:

The input buffer is disabled in the PORTx.PINnCTRL register (a wrapper function around this is planned for a future update)

Has that wrapper function been written yet, or is that still planned?

Thanks!

[nabelekt]

@SpenceKonde answered these questions here: #161 (comment)

[SpenceKonde]

I wouldn't say I answered much there...

1. Yeah it looks like it - There's a RTC_PERIOD_CYC32768_gc option, and it looks to me like the RTC prescaler that can be set in RTC.CTRLA does effect the PIT clock...

2. pinConfigure() provides a wrapper around disabling pins, the latest documentation also gives a quick description of the multipin configuration registers (no wrapper - it doesn't really lend itself to that) which can be used to disable inputs on large numbers of pins quickly and easily.

[nabelekt]

@SpenceKonde, will SpenceKonde/megaTinyCore#158 apply to DxCore as well?

[SpenceKonde]

yes