Atmel Evaluation Kit for AT32uC3A0512, 32-Bit AVR Microcontroller Atmel ATEVK1105 ATEVK1105 데이터 시트
제품 코드
ATEVK1105
86
AT32UC3A
14. Real Time Counter (RTC)
Rev: 2.3.0.1
14.1
Features
•
32-bit real-time counter with 16-bit prescaler
•
Clocked from RC oscillator or 32 KHz oscillator
•
High resolution: Max count frequency 16 KHz
•
Long delays
– Max timeout 272 years
•
Extremely low power consumption
•
Available in all sleep modes except Static
•
Interrupt on wrap
14.2
Description
The Real Time Counter (RTC) enables periodic interrupts at long intervals, or accurate mea-
surement of real-time sequences. The RTC is fed from a 16-bit prescaler, which is clocked from
the RC oscillator or the 32 KHz oscillator. Any tapping of the prescaler can be selected as clock
source for the RTC, enabling both high resolution and long timeouts. The prescaler cannot be
written directly, but can be cleared by the user.
The RTC can generate an interrupt when the counter wraps around the value stored in the top
The RTC can generate an interrupt when the counter wraps around the value stored in the top
register, producing accurate periodic interrupts.
32058K
AVR32-01/12