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AM1802 Datasheet(PDF) 158 Page - Texas Instruments |
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AM1802 Datasheet(HTML) 158 Page - Texas Instruments |
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158 / 180 page  Seconds Minutes Hours Days Months Years Alarm Timer Alarm Interrupts Periodic Interrupts Counter 32kHz Oscillator Compensation Week Days Oscillator RTC_XI XTAL RTC_XO AM1802 SPRS710C – NOVEMBER 2010 – REVISED MARCH 2012 www.ti.com 5.22 Real Time Clock (RTC) The RTC provides a time reference to an application running on the device. The current date and time is tracked in a set of counter registers that update once per second. The time can be represented in 12-hour or 24-hour mode. The calendar and time registers are buffered during reads and writes so that updates do not interfere with the accuracy of the time and date. Alarms are available to interrupt the CPU at a particular time, or at periodic time intervals, such as once per minute or once per day. In addition, the RTC can interrupt the CPU every time the calendar and time registers are updated, or at programmable periodic intervals. The real-time clock (RTC) provides the following features: • 100-year calendar (xx00 to xx99) • Counts seconds, minutes, hours, day of the week, date, month, and year with leap year compensation • Binary-coded-decimal (BCD) representation of time, calendar, and alarm • 12-hour clock mode (with AM and PM) or 24-hour clock mode • Alarm interrupt • Periodic interrupt • Single interrupt to the CPU • Supports external 32.768-kHz crystal or external clock source of the same frequency • Separate isolated power supply Figure 5-51 shows a block diagram of the RTC. Figure 5-51. Real-Time Clock Block Diagram 158 Peripheral Information and Electrical Specifications Copyright © 2010–2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): AM1802 |
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