SAM3A4C Atmel Corporation, SAM3A4C Datasheet - Page 533

• Manufacturer Part Number: SAM3A4C
• Manufacturer: Atmel Corporation

28. Power Management Controller (PMC)
28.1
28.1.1
28.1.2
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
Clock Generator
Description
Embedded Characteristics
The Clock Generator User Interface is embedded within the Power Management Controller and
is described in
the Clock Generator registers are named CKGR_.
The Clock Generator is made up of:
It provides the following clocks:
• A Low Power 32,768 Hz Slow Clock Oscillator with bypass mode.
• A Low Power RC Oscillator
• A 3 to 20 MHz Crystal or Ceramic Resonator-based Oscillator, which can be bypassed.
• A factory programmed Fast RC Oscillator. 3 output frequencies can be selected: 4, 8 or
• A 480 MHz UTMI PLL, providing a clock for the USB High Speed Controller.
• A 96 to 192 MHz programmable PLL (input from 8 to 16 MHz), capable of providing the clock
• SLCK, the Slow Clock, which is the only permanent clock within the system.
• MAINCK is the output of the Main Clock Oscillator selection: either the Crystal or Ceramic
• PLLACK is the output of the Divider and 96 to 192 MHz programmable PLL (PLLA).
• UPLLCK is the output of the 480 MHz UTMI PLL (UPLL).
12 MHz. By default 4MHz is selected.
MCK to the processor and to the peripherals.
Resonator-based Oscillator or 4/8/12 MHz Fast RC Oscillator.
Section 28.2.15 ”Power Management Controller (PMC) User
Interface”. However,
SAM3X/A
SAM3X/A
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