Datasheet

129
42023E–SAM–07/2013
ATSAM4L8/L4/L2
10.7.13 Status Register
Name: SR
Access Type: Read-only
Offset: 0x0D4
Reset Value: 0x00000000
• AE: Access Error
0: No access error has occurred.
1: A write to lock protected register without unlocking it has occurred.
• WAKE: Wake up
0: No wakeup has occurred.
1: A wakeup event has occurred. Refer the WCAUSE register to know the wakeup source.
• CKRDY: Clock Ready
0: The CKSEL register has been written, and the new clock setting is not yet effective.
1: The synchronous clocks have frequencies as indicated in the CKSEL register.
• CFD: Clock Failure Detected
0: Main clock is running correctly.
1: Failure on main clock detected. Main clock reverting to RCSYS.
31 30 29 28 27 26 25 24
AE-------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
-------WAKE
76543210
- - CKRDY - - - - CFD