Datasheet

70
32072H–AVR32–10/2012
AT32UC3A3
7.6.12 Power and Oscillators Status Register
Name: POSCSR
Access Type: Read-only
Offset: 0x54
Reset Value: 0x00000020
• BOD33DET: Brown out 3V3 detection
0: No BOD33 event
1: BOD33 has detected that power supply is going below BOD33 reference value.
• BODDET: Brown out detection
0: No BOD event
1: BOD has detected that power supply is going below BOD reference value.
• OSC32RDY: 32 KHz oscillator Ready
0: The 32 KHz oscillator is not enabled or not ready.
1: The 32 KHz oscillator is stable and ready to be used as clock source.
• OSC1RDY: OSC1 ready
0: Oscillator 1 not enabled or not ready.
1: Oscillator 1 is stable and ready to be used as clock source.
• OSC0RDY: OSC0 ready
0: Oscillator 0 not enabled or not ready.
1: Oscillator 0 is stable and ready to be used as clock source.
• MSKRDY: Mask ready
0: Mask register has been changed, masking in progress.
1: Clock are masked according to xxx_MASK
• CKRDY:
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.
• LOCK1: PLL 1 locked
0:PLL 1 is unlocked
1:PLL 1 is locked, and ready to be selected as clock source.
• LOCK0: PLL 0 locked
0: PLL 0 is unlocked
1: PLL 0 is locked, and ready to be selected as clock source.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
------BOD33DETBODDET
15 14 13 12 11 10 9 8
------OSC32RDYOSC1RDY
76543210
OSC0RDY MSKRDY CKRDY - - - LOCK1 LOCK0