Datasheet

89
AT32UC3A
14.6 User Interface
14.6.1 RTC Control
Name: CTRL
Access Type: Read/Write
• CLKEN: Clock enable
0: The clock is disabled
1: The clockis enabled
• PSEL: Prescale Select
Selects prescaler bit PSEL as source clock for the RTC.
• BUSY: RTC busy
0: The RTC accepts writes to TOP, VAL, and CTRL.
1: The RTC is busy and will discard writes to TOP, VAL, and CTRL.
• CLK32: 32 KHz oscillator select
0: The RTC uses the RC oscillator as clock source
1: The RTC uses the 32 KHz oscillator as clock source
Offset Register Register Name Access Reset
0x00 RTC Control CTRL Read/Write 0x0
0x04 RTC Value VAL Read/Write 0x0
0x08 RTC Top TOP Read/Write 0x0
0x10 RTC Interrupt Enable IER Write-only 0x0
0x14 RTC Interrupt Disable IDR Write-only 0x0
0x18 RTC Interrupt Mask IMR Read-only 0x0
0x1C RTC Interrupt Status ISR Read-only 0x0
0x20 RTC Interrupt Clear ICR Write-only 0x0
31 30 29 28 27 26 25 24
- - - - - - - -
23 22 21 20 19 18 17 16
- - - - - - - CLKEN
15 14 13 12 11 10 9 8
- - - - PSEL
7 6 5 4 3 2 1 0
- - - BUSY CLK32 WAKE_EN PCLR EN
32058K
AVR32-01/12