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STR720 датащи(PDF) 159 Page - STMicroelectronics

номер детали STR720
подробное описание детали  ARM720T 16/32-BIT MCU WITH 16K RAM, USB, CAN, 3 TIMERS, ADC, 6 COMMUNICATIONS INTERFACES
PDF  401 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STR720 датащи(HTML) 159 Page - STMicroelectronics

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STR720 - REAL TIME CLOCK (RTC)
159/401
at least one CLK_AF period, i.e. about 30
µs using 32 kHz crystal oscillator), it is important to
consider it when RTC register update occurs within an interrupt response routine, since also
interrupt pending bits, located in RTCCR, can be cleared only when RTOFF is ‘1’. As a
consequence it is recommended to clear IRQ pending bits before or during the same
configuration procedure used to update other RTC registers.
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