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    參數(shù)資料
    型號(hào): MC80C52XXX-30/883D
    廠商: ATMEL CORP
    元件分類: 微控制器/微處理器
    英文描述: 8-BIT, MROM, 30 MHz, MICROCONTROLLER, CDIP40
    封裝: 0.600 INCH, SIDE BRAZED, DIP-40
    文件頁(yè)數(shù): 90/126頁(yè)
    文件大?。?/td> 22337K
    代理商: MC80C52XXX-30/883D
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    18
    XMEGA C3 [DATASHEET]
    8492F–AVR–07/2013
    Figure 9-1.
    The clock system, clock sources and clock distribution.
    9.3
    Clock Sources
    The clock sources are divided in two main groups: internal oscillators and external clock sources. Most of the clock
    sources can be directly enabled and disabled from software, while others are automatically enabled or disabled,
    depending on peripheral settings. After reset, the device starts up running from the 2MHz internal oscillator. The other
    clock sources, DFLLs and PLL, are turned off by default.
    The internal oscillators do not require any external components to run. For details on characteristics and accuracy of the
    internal oscillators, refer to the device datasheet.
    9.3.1
    32kHz Ultra Low Power Internal Oscillator
    This oscillator provides an approximate 32kHz clock. The 32kHz ultra low power (ULP) internal oscillator is a very low
    power clock source, and it is not designed for high accuracy. The oscillator employs a built-in prescaler that provides a
    Real Time
    Counter
    Peripherals
    RAM
    AVR CPU
    Non-Volatile
    Memory
    Watchdog
    Timer
    Brown-out
    Detector
    System Clock Prescalers
    USB
    Prescaler
    System Clock Multiplexer
    (SCLKSEL)
    PLLSRC
    RTCSRC
    DIV
    3
    2
    32kHz
    Int. ULP
    32.768kHz
    Int. OSC
    32.768kHz
    TOSC
    2MHz
    Int. Osc
    32MHz
    Int. Osc
    0.4 – 16MHz
    XTAL
    DIV
    3
    2
    DIV
    3
    2
    DI
    V4
    XOSCSEL
    PLL
    USBSRC
    TO
    S
    C
    1
    TO
    S
    C
    2
    XTAL1
    XTAL2
    clkSYS
    clkRTC
    clkPER2
    clkPER
    clkCPU
    clkPER4
    clkUSB
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