SAM4L Datasheet, PDF (196/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

ATSAM4L4/L2
13. System Control Interface (SCIF)
Rev: 1.3.0.0
13.1 Features
• Supports crystal oscillator 0.6-30MHz (OSC0)
• Supports Digital Frequency Locked Loop 20-150MHz (DFLL)
• Supports Phase Locked Loop 48-240MHz (PLL)
• Integrated low-power RC oscillator (RCSYS)
• Provides Generic clocks (GCLK) with wide frequency range
• Controls 80MHz integrated RC Oscillator (RC80M)
• Controls 4/8/12MHz integrated RC Oscillator (RCFAST)
13.2 Overview
The System Control Interface (SCIF) controls the oscillators, Generic Clocks, PLL and DFLL. It
is located in Core domain.
13.3 Block Diagram
Figure 13-1. SCIF Block Diagram
APB BUS
NVIC
XIN
XOUT
DFLL
PLL
RC80M
RCFAST
RCSYS
OSC0
GENERIC
CLOCK
CONTROLLER
FRACTIONAL
PRESCALER
HIGH
RESOLUTION
PRESCALER
System Clocks Vector
To POWER
MANAGER
SYSTEM CONTROL
INTERFACE
(SCIF)
Generic Clocks Vector
To
PERIPHERALS
42023C–SAM–02/2013
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