Atmel Evaluation Kit for AT32uC3A0512, 32-Bit AVR Microcontroller Atmel ATEVK1105 ATEVK1105 データシート
製品コード
ATEVK1105
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
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.
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
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