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| -rw-r--r-- | docs/mimxrt/quickref.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/docs/mimxrt/quickref.rst b/docs/mimxrt/quickref.rst index 79d2a1551..cfd060505 100644 --- a/docs/mimxrt/quickref.rst +++ b/docs/mimxrt/quickref.rst @@ -438,6 +438,10 @@ The i.MXRT MCU supports battery backup of the RTC. By connecting a battery of current drawn from the battery is ~20µA, which is rather high. A CR2032 coin cell will last for about one year. +Note: In v1.23.0 the support for subseconds was removed. When reading the RTC, 0 will +be returned as value for subsecond, When setting the RTC time, the subsecond +field is ignored. The RTC itself does not provide a microsecond value. + SD card ------- |