PCF85063ATL Datasheet, PDF (11/54 Pages) NXP Semiconductors – Tiny Real-Time Clock/calendar with alarm function and I2C-bus

NXP Semiconductors
PCF85063ATL
Tiny Real-Time Clock/calendar with alarm function and I²C-bus
8.2.2.1 Alarm interrupt
+0,
6(&21'6 &2817(5
0,187(6 &2817(5
0,
&2817'2:1 &2817(5
7) 7,0(5 )/$*
6(7
&/($5
WR LQWHUIDFH
UHDG 7)
38/6(
*(1(5$725 
75,**(5
7,(


7(
IURP LQWHUIDFH
FOHDU 7)
&/($5
7,B73
$) $/$50 )/$*
WR LQWHUIDFH
UHDG $)
$,(
VHW DODUP
IODJ $)
6(7
&/($5
IURP LQWHUIDFH
FOHDU $)
RIIVHW FLUFXLW
DGGVXEVWUDFW
SXOVH
&,(
38/6(
*(1(5$725 
75,**(5
&/($5
IURP LQWHUIDFH
VHW &,(
When AIE bit is disabled, pin INT remains high-impedance.
Fig 7. Interrupt scheme
,17
H[DPSOH
$,(


DDD
AIE: This bit activates or deactivates the generation of an interrupt when AF is asserted,
respectively.
AF: When an alarm occurs, AF is set logic 1. This bit maintains its value until overwritten
by command. To prevent one flag being overwritten while clearing another, a logic AND is
performed during a write access.
8.2.2.2 MI and HMI: minute and half minute interrupt
The minute interrupt (bit MI) and half minute interrupt (bit HMI) are pre-defined timers for
generating interrupt pulses on pin INT; see Figure 8. The timers are running in sync with
the seconds counter (see Table 19 on page 18).
When starting MI, the first interrupt will be generated after 1 second to 59 seconds. When
starting HMI, the first interrupt will be generated after 1 second to 29 seconds.
Subsequent periods do not have such a delay. The timers can be enabled independently
from one another. However, a minute interrupt enabled on top of a half minute interrupt is
not distinguishable.
PCF85063ATL
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 15 April 2013
© NXP B.V. 2013. All rights reserved.
11 of 54