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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F301C6 датащи(PDF) 25 Page - STMicroelectronics |
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STM32F301C6 датащи(HTML) 25 Page - STMicroelectronics |
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25 / 141 page  DS9895 Rev 8 25/141 STM32F301x6 STM32F301x8 Functional overview 52 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 and Standby 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 and Standby modes 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 and Standby modes on timestamp event detection. • 17-bit Auto-reload counter for periodic interrupt with wakeup from STOP/STANDBY 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. |
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