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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SAM3X датащи(PDF) 44 Page - ATMEL Corporation |
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SAM3X датащи(HTML) 44 Page - ATMEL Corporation |
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44 / 71 page  46 11057BS–ATARM–13-Jul-12 SAM3X/A 46 11057BS–ATARM–13-Jul-12 SAM3X/A The Slow Clock generator is based on a 32 kHz crystal oscillator and an embedded 32 kHz RC oscillator. The Slow Clock defaults to the RC oscillator, but the software can enable the crystal oscillator and select it as the Slow Clock source. The Supply Controller starts up the device by enabling the Voltage Regulator, then it generates the proper reset signals to the core power supply. It also enables to set the system in different low power modes and to wake it up from a wide range of events. 10.5 Clock Generator The Clock Generator is made up of: • One Low Power 32,768 Hz Slow Clock Oscillator with bypass mode • One Low Power RC Oscillator • One 3 to 20 MHz Crystal or Ceramic-based Oscillator, which can be bypassed • One factory-programmed Fast RC Oscillator; 3 output frequencies can be selected: 4, 8 or 12 MHz. By default, 4 MHz is selected. 8 MHz and 12 MHz output are factory-calibrated. • One 480 MHz UPLL providing a clock for the USB OTG High Speed Controller. Input frequency is 12 MHz (only). • One 96 to 192 MHz programmable PLL (PLLA), capable to provide the clock MCK to the processor and to the peripherals. The input frequency of the PLL A is between 8 and 16 MHz. |
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