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PCF85263ATL/A Datasheet(PDF) 21 Page - NXP Semiconductors

Part # PCF85263ATL/A
Description  Tiny Real-Time Clock/calendar with alarm function, battery switch-over, time stamp input, and I2C-bus
PDF  100 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF85263ATL/A Datasheet(HTML) 21 Page - NXP Semiconductors

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PCF85263A
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet
Rev. 4.1 — 27 November 2015
21 of 100
NXP Semiconductors
PCF85263A
Tiny RTC with alarm, battery switch-over, and I2C-bus
[1]
Default value.
8.4.1.3
Alarm1 and alarm2 function in RTC mode
The registers at addresses 08h through 0Ch contain alarm1 information. When one or
more of these registers is loaded with second, minute, hour, day, or month, and its
corresponding alarm enable bit (SEC_A1E to MON_A1E) is set logic 1, then that
information is compared with the current second, minute, hour, day, and month.
The registers at addresses 0Dh through 0Fh contain alarm2 information. When one or
more of these registers is loaded with minute, hour or weekday, and its corresponding
alarm enable bit (MIN_A2E to WDAY_A2E) is set logic 1, then that information is
compared with the current minute, hour and weekday.
Alarm registers which have their alarm enable bit at logic 0 are ignored.
When the time increments to match the enabled alarms, the alarm flag in the Flags
register (Section 8.14 on page 57) is set. A1F for alarm1 and A2F for alarm2. The alarm
flag is cleared by command.
When the time increments to match the enabled alarms, an interrupt can be generated.
See Section 8.4.3 “Alarm interrupts”.
1
MIN_A1E
minute alarm1 enable
0[1]
disabled
1
enabled
0
SEC_A1E
second alarm1 enable
0[1]
disabled
1
enabled
Table 14.
Alarm_enables- alarm enable control register (address 10h) bit
description …continued
Bit
Symbol
Value
Description



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