PCF85263ATLSLASHA datasheet(61/92 Pages) NXP

61 / 92 page

NXP Semiconductors

PCF85263A

Tiny Real-Time Clock/calendar with alarm function, battery switch-over, time stamp input, and I2C-bus

sample

invert

mechanical

switch detector

vdd_int

TS pin

sample

clock, 16 Hz

TSL

aaa-010560

STOP

control

STOPM

Time

counter

stop

TSR2

load

TSR2

flag

INTA

gen.

INTA

VSS

Figure 36. Application example

The RTC must be configured correctly for this mode of operation. Outlined in Table 65

are the settings needed for this mode.

In addition, the time must be set and any other configurations like battery switch-over,

quartz oscillator driving mode, etc., which are dependent on the application.

The sampler circuit shown in Figure 36 will hold invalid data until the mechanical switch

detector mode is enabled. It then requires a minimum of one sample period to initialize

to the current TS pin level. It is recommended to enable the mechanical detector mode

on the TS pin at least 62.5 ms before enabling the TS event mode. Failure to do so can

result in a false first event.

Section

Bit(s)

State

Comment

Pin_IO

Section 7.12

TSPM[1:0]

TS pin in input mode

Pin_IO

Section 7.12

TSIM

select mechanical switch mode

Pin_IO

Section 7.12

TSL

TS pin input is active LOW

STOPM

allow TS pin to control STOP

TSRIEA

allow timestamps to create interrupts

Function

Section 7.13

ILPA

generate interrupt pulses

TSR_mode Section 7.12

TSR2M[2:0]

101

last event mode for timestamp2

Pin_IO

Section 7.12

INTAPM[1:0]

output interrupt on INTA

Table 65. Application configuration

PCF85263A

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 5 — 1 February 2021

61 / 92

PCF85263ATL/A Datasheet(PDF) 61 Page - NXP Semiconductors

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