PCF85363ATLSLASHA datasheet(49/86 Pages) NXP

49 / 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

Bit

Symbol

Value

Description

once per hour

Table 52. PI[1:0] bits - Function control register (address 28h)...continued

[1]

Default value.

The periodic interrupt mode can be used to enable pre-defined timers for generating

pulses on the interrupt pin. Interrupts once per second, once per minute or once per hour

can be generated.

When disabled, the timers are reset. When enabled, the time to the first pulse is between

the chosen period and the chosen period minus 1 seconds.

The timers are not affected by STOP.

When the periodic interrupt triggers, the PIF (PI flag) in the Flags register (Section 7.14)

is set.

The flag does not have to be cleared to allow another INTA or INTB pulse.

The duration of the periodic interrupt is unaffected by offset calibration.

See Section 7.9 for a description of interrupt pulse control and output pins.

7.13.3 RTCM: RTC mode

Bit

Symbol

Value

Description

RTC mode

0[1]

real-time clock mode

RTCM

stop-watch mode

Table 53. RTCM bit - Function control register (address 28h)

[1]

Default value.

The RTC mode is used to control how the time is counted. When configured as a classic

RTC, then time is counted from 100th seconds to years. In stop-watch mode, time is

counted from 100th seconds to 999 999 hours.

RTCM Mode

Time counting

RTC

100th seconds[1], seconds, minutes, hours, days, weekdays, months, years

stop-watch 100th seconds[1], seconds, minutes, hours (0 hours to 999 999 hours)

Table 54. RTC time counting modes

[1]

Enabled with 100TH bit in the Function register (Section 7.13).

7.13.4 STOPM: STOP mode control

Bit

Symbol

Value

Description

STOP mode

0[1]

RTC stop is controlled by STOP bit only

STOPM

RTC stop is controlled by STOP bit or TS

Table 55. STOPM bit - Function control register (address 28h)

PCF85363A

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

Product data sheet

Rev. 3.1 — 18 June 2021

49 / 86

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