at91sam7x256 ATMEL Corporation, at91sam7x256 Datasheet - Page 27

• Manufacturer Part Number: at91sam7x256
• Description: Preliminary Summary
• Manufacturer: ATMEL Corporation

9.2
6120ES–ATARM–08-Oct-07
Clock Generator
The Clock Generator embeds one low-power RC Oscillator, one Main Oscillator and one PLL
with the following characteristics:
It provides SLCK, MAINCK and PLLCK.
Figure 9-2.
• 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
AT91SAM7X512/256/128 Preliminary Summary
Clock Generator Block Diagram
PLLRC
XOUT
XIN
Clock Generator
Management
Embedded
Status
Oscillator
Oscillator
PLL and
Controller
Divider
Main
Power
RC
Control
Slow Clock
SLCK
Main Clock
MAINCK
PLL Clock
PLLCK
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