Datasheet

530
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
29.17.16PMC Status Register
Name: PMC_SR
Address: 0x400E0468
Access: Read-only
• MOSCXTS: Main XTAL Oscillator Status
0: Main XTAL oscillator is not stabilized.
1: Main XTAL oscillator is stabilized.
• LOCKA: PLLA Lock Status
0: PLLA is not locked
1: PLLA is locked.
• LOCKB: PLLB Lock Status
0: PLLB is not locked
1: PLLB is locked.
• MCKRDY: Master Clock Status
0: Master Clock is not ready.
1: Master Clock is ready.
• OSCSELS: Slow Clock Oscillator Selection
0: Internal slow clock RC oscillator is selected.
1: External slow clock 32 kHz oscillator is selected.
• PCKRDYx: Programmable Clock Ready Status
0: Programmable Clock x is not ready.
1: Programmable Clock x is ready.
• MOSCSELS: Main Oscillator Selection Status
0: Selection is in progress.
1: Selection is done.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
– – – FOS CFDS CFDEV MOSCRCS MOSCSELS
15 14 13 12 11 10 9 8
–––––PCKRDY2PCKRDY1PCKRDY0
76543210
OSCSELS – – – MCKRDY LOCKB LOCKA MOSCXTS