Datasheet

Hours
32-kHz clock
input
INT_ALARM
INT_TIMER
Seconds
Interrupt
Minutes
Week
Days
Days
Months Years
Control
Alarm
Frequency
compensation
32-kHz
counter
SWCS046-014
TPS65910 , TPS65910A , TPS65910A3 , TPS659101
TPS659102 , TPS659103 , TPS659104 , TPS659105
TPS659106, TPS659107, TPS659108, TPS659109
www.ti.com SWCS046U –MARCH 2010–REVISED JUNE 2014
6.5 RTC
The RTC, which is driven by the 32-kHz clock, provides the alarm and timekeeping functions. The RTC is
kept supplied when the device is in the OFF or the BACKUP state.
The main functions of the RTC block are:
• Time information (seconds/minutes/hours) directly in binary-coded decimal (BCD) format
• Calendar information (Day/Month/Year/Day of the week) directly in BCD code up to year 2099
• Programmable interrupts generation: The RTC can generate two interrupts: a timer interrupt
RTC_PERIOD_IT periodically (1s/1m/1h/1d period) and an alarm interrupt RTC_ALARM_IT at a
precise time of the day (alarm function). These interrupts are enabled using IT_ALARM and IT_TIMER
control bits. Periodically interrupts can be masked during the SLEEP period to avoid host interruption
and are automatically unmasked after SLEEP wakeup (using the IT_SLEEP_MASK_EN control bit).
• Oscillator frequency calibration and time correction
Figure 6-4. RTC Digital Section Block Diagram
NOTE
INT_ALARM can generate a wakeup of the platform.
INT_TIMER cannot generate a wakeup of the platform.
Copyright © 2010–2014, Texas Instruments Incorporated Detailed Description 53
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