Datasheet

190
42023E–SAM–07/2013
ATSAM4L8/L4/L2
12.7.15 1MHz RC Clock Configuration Register
Name: RC1MCR
Access Type: Read/Write
Reset Value: -
• CLKCAL: 1MHz RC Osc Calibration
Calibration field of the internal RC oscillator.
• CLKOEN: 1MHz RC Osc Clock Output Enable
0: The 1MHz RC oscillator is not output.
1: The 1MHz RC oscillator is output, available as a logic clock.
• FCD: Flash Calibration Done
This bit is set to 1 when the CLKCAL field has been loaded by the flash fuses after a reset (read only).
0: The flash calibration will be redone after any reset.
1: The flash calibration will only be redone after a power-on reset (POR18).
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Refer to
Section 12.7.7 ”Unlock Register” on page 179 for details.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - CLKCAL[4:0]
76543210
FCD------CLKOEN