PCF85363ATLSLASHA datasheet(34/86 Pages) NXP

34 / 86 page

NXP Semiconductors

PCF85363A

Tiny Real-Time Clock/calendar with 64 byte RAM, alarm function, battery switch-over time stamp input,

and I2C-bus

Symbol

Bit

INTA

INTB

Value

Description

alarm1 interrupt enable

0[1]

no alarm interrupt generated

A1IEA

A1IEB

alarm interrupt generated

alarm2 interrupt enable

0[1]

no alarm interrupt generated

A2IEA

A2IEB

alarm interrupt generated

timestamp register interrupt enable

0[1]

no timestamp register interrupt generated

TSRIEA

TSRIEB

timestamp register interrupt generated

battery switch interrupt enable

0[1]

no battery switch interrupt generated

BSIEA

BSIEB

battery switch interrupt generated

WatchDog interrupt enable

0[1]

no WatchDog interrupt generated

WDIEA

WDIEB

WatchDog interrupt generated

Table 28. Definition of interrupt control bits...continued

[1]

Default value.

7.9.1 ILPA/ILPB: interrupt level or pulse mode

Interrupts can be configured to generate a pulse or to send a continuous level

(permanent signal) which follows the state of the flag.

In pulse mode, an interrupt pulse is generated every time that the selected source

triggers.

Triggered means

• for periodic interrupts, every time a period has elapsed

• for offset correction, every time a correction pulse is initiated

• for alarms, every time the time increments to match the alarm time

• for timestamps, every time a register updates

• for battery switch, every time the IC switches to or from battery

• for WatchDog, every time the counter reaches the end of its count

The interrupt signal goes active coincident with the triggering event. The signal is cleared

by an internal 128 Hz clock. The internal clock is asynchronous to the triggering event

and so the pulse duration has a minimum period of one 128 Hz cycle and a maximum of

two 128 Hz cycles. Interrupt pulses may be shortened by clearing the flag before the end

of the pulse period.

PCF85363A

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

Product data sheet

Rev. 3.1 — 18 June 2021

34 / 86

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