功能

• Real-time clock (with NV memory), a real-time clock product of Integrated
• Maxim. Built-in non-volatile memory for data retention. The Clock/Calendar function can display seconds, minutes, hours, days, dates, dates, and years. Clocks typically display time in 12 hour or 24 hour format with AM/PM display. Some have additional features such as monitoring timers, alarms, and trickle charging facilities for external backup batteries. Some devices also include a crystal for the clock oscillator.