STM32F318C8 datasheet(24/125 Pages) STMICROELECTRONICS

24 / 125 page

Functional overview

STM32F318C8 STM32F318K8

24/125

DocID026294 Rev 5

The RTC is an independent BCD timer/counter. It supports the following features:



Calendar with subsecond, seconds, minutes, hours (12 or 24 format), week day, date,

month, year, in BCD (binary-coded decimal) format.



Automatic correction for 28, 29 (leap year), 30, and 31 days of the month.



Two programmable alarms with wake up from Stop mode capability.



On-the-fly correction from 1 to 32767 RTC clock pulses. This can be used to

synchronize it with a master clock.



Digital calibration circuit with 1 ppm resolution, to compensate for quartz crystal

inaccuracy.



Two anti-tamper detection pins with programmable filter. The MCU can be woken up

from Stop mode on tamper event detection.



Timestamp feature which can be used to save the calendar content. This function can

be triggered by an event on the timestamp pin, or by a tamper event. The MCU can be

woken up from Stop mode on timestamp event detection.



17-bit Auto-reload counter for periodic interrupt with wakeup from STOP capability.

The RTC clock sources can be:



A 32.768 kHz external crystal



A resonator or oscillator



The internal low-power RC oscillator (typical frequency of 40 kHz)



The high-speed external clock divided by 32.

STM32F318C8 Datasheet(PDF) 24 Page - STMicroelectronics