PCF85263ATL/AX View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
PCF85263ATL/AX
NXP Semiconductors.
'PCF85263ATL/AX' PDF : 100 Pages View PDF
NXP Semiconductors
PCF85263A
Tiny RTC with alarm, battery switch-over, and I2C-bus
When reading or writing the time it is very important to make a read or write access in one
go, that is, setting or reading 100th_seconds through to HR_00_xx_xx should be made in
one single access. Failing to comply with this method could result in the time becoming
corrupted.
As an example, if the seconds value is set in one access and then in a following access
the minutes value is set, it is possible that the time increments between the two accesses.
A similar problem exists when reading. A roll-over may occur between reads thus giving
the seconds from one moment and the minutes from the next.
+]WLFN
7+B6(&21'6
+]WLFN
7+
6(&21'6
0,187(6
+5B;;B;;B
+5B;;BB;;
+5BB;;B;;
Fig 11. Data flow for the stop-watch function
DDD
8.4 Alarms
There are two independent alarms. Each is separately configured and may be used to
generate an interrupt. In RTC mode, an alarm is configured for time and date. In
stop-watch mode when the RTC is functioning as an elapsed time counter, an alarm is
configured for time only.
8.4.1 Alarms in RTC mode
In RTC mode, Alarm 1 can be configured from seconds to months. Alarm 2 operates on
minutes, hours and weekday. Each segment of the time is independently enabled. Alarms
can be output on the INTA and INTB pins.
8.4.1.1 Alarm1 and alarm2 registers in RTC mode
Setting the time for alarm1: Only the information which is relevant for the alarm condition
must to be programmed. The unused parts are ignored.
PCF85263A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4.1 — 27 November 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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