| 8kB or 32kB of User NV RAM Integrated NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit, and Lithium Energy Source Totally Nonvolatile With Over 10 Years of Operation in the Absence of Power Watchdog Timer Restarts an Out-Of- Control Processor Alarm Function Schedules Real-Time Related Activities such as System Wakeup Programmable Interrupts and Square Wave Output All Registers are Individually Addressable via the Address and Data Bus Interrupt Signals are Active in Power- Down Mode |