Atmel SAM4L Xplained Pro Evaluation Kit Atmel ATSAM4L-XPRO ATSAM4L-XPRO データシート

42023E–SAM–07/2013

The specific configuration for each FREQM instance is listed in the following tables. The module
bus clocks listed here are connected to the system bus clocks. Refer to 

 for details.

FREQM Clock Name

CLK_FREQM

Clock for the FREQM bus interface

CLK_MSR

Measured clock

CLK_REF

Reference clock

Register Reset Values

VERSION

0x00000311

Clock Sources for CLK_MSR

0

CLK_CPU

The clock the CPU runs on

1

CLK_AHB

High Speed Bus clock

2

CLK_APBA

Peripheral Bus A clock

3

CLK_APBB

Peripheral Bus B clock

4

CLK_APBC

Peripheral Bus C clock

5

CLK_APBD

Peripheral Bus D clock

6

OSC0

Output clock from Oscillator 0

7

CLK32K

32kHz Output clock from OSC32K or RC32K

8

RCSYS

Output clock from RCSYS Oscillator

9

DFLL0

Output clock from DFLL0

11-22

GCLK0-11

Generic clock 0 through 11

23

RC80M

Output clock from RC80M

24

RCFAST

Output clock from RCFAST

25

RC1M

Output clock from VREG RC1M

26

PLL

Output clock from PLL0

27-31

Reserved