SAM7X128_14 Datasheet, PDF (26/662 Pages) ATMEL Corporation – ARM-based Flash MCU

9.2 Clock Generator
The Clock Generator embeds one low-power RC Oscillator, one Main Oscillator and one PLL with the following
characteristics:
 RC Oscillator ranges between 22 KHz and 42 KHz
 Main Oscillator frequency ranges between 3 and 20 MHz
 Main Oscillator can be bypassed
 PLL output ranges between 80 and 200 MHz
It provides SLCK, MAINCK and PLLCK.
Figure 9-2. Clock Generator Block Diagram
Clock Generator
Embedded
RC
Oscillator
Slow Clock
SLCK
XIN
XOUT
Main
Oscillator
Main Clock
MAINCK
PLLRC
PLL and
Divider
PLL Clock
PLLCK
Status Control
Power
Management
Controller
SAM7X Series [DATASHEET] 26
6120K–ATARM–11-Feb-14