Table of Contents
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External Interface .................................................................................................................................... 21–4
ADSP-SC58x WDOG Register Descriptions .............................................................................................. 21–4
Count Register ........................................................................................................................................ 21–5
Control Register ...................................................................................................................................... 21–6
Watchdog Timer Status Register .............................................................................................................. 21–7
Real Time Clock (RTC)
RTC Features............................................................................................................................................... 22–1
RTC Functional Description........................................................................................................................ 22–1
ADSP-SC58x RTC Register List .............................................................................................................. 22–2
ADSP-SC58x RTC Interrupt List ............................................................................................................ 22–2
ADSP-SC58x RTC Trigger List................................................................................................................ 22–3
RTC Definitions....................................................................................................................................... 22–3
RTC Signal Descriptions .......................................................................................................................... 22–3
RTC Architectural Concepts..................................................................................................................... 22–3
RTC Block Diagram.............................................................................................................................. 22–4
Power Supply Partitioning..................................................................................................................... 22–4
Battery Life ........................................................................................................................................... 22–5
Writes to the 1 Hz Registers .................................................................................................................. 22–5
Reads From the 1 Hz Registers.............................................................................................................. 22–6
RTC Operating Modes ................................................................................................................................ 22–6
Alarm ....................................................................................................................................................... 22–6
Day Alarm ................................................................................................................................................ 22–6
Stopwatch................................................................................................................................................. 22–6
Digital Watch Mode ................................................................................................................................. 22–7
Calibration for Accuracy........................................................................................................................... 22–7
Accuracy................................................................................................................................................ 22–8
RTC Event Control...................................................................................................................................... 22–8
RTC Status and Error Signals ................................................................................................................... 22–9
RTC Programming Model ........................................................................................................................... 22–9
Power-Up, Power-Down and Reset........................................................................................................... 22–9
xxxiv
ADSP-SC58x/ADSP-2158x SHARC+ Processor Hardware Reference
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