SAM4L Datasheet, PDF (532/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

ATSAM4L4/L2
Table 22-5. Clock Sources for CLK_REF
REFSEL Clock/Oscillator
Description
0
RCSYS
System RC oscillator clock
1
CLK32K
32kHz Output clock from OSC32K or RC32K
2
CLK1K
1kHz Output clock from OSC32K or RC32K
3
GCLK11
Generic clock 11
4-7
Reserved
42023C–SAM–02/2013
532