PCF8564A datasheet(27/59 Pages) NXP

Part #	PCF8564A

Description	Automotive tiny Real-Time Clock/calendar with alarm function and I2C-bus

PDF	59 Pages

Scroll/Zoom	100%

Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

Logo

27 / 59 page

PCA85063A

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

Product data sheet

Rev. 4 — 30 March 2018

27 of 59

NXP Semiconductors

PCA85063A

Automotive Real-Time Clock/calendar with alarm function and I2C-bus

8.6 Timer registers

The 8-bit countdown timer at address 10h is controlled by the register Timer_mode at

address 11h.

8.6.1 Register Timer_value

[1]

Default value.

[2]

Countdown period in seconds:

where T is the

countdown value.

(1) Only when all enabled alarm settings are matching.

It is only on increment to a matched case that the alarm flag is set.

Fig 14. Alarm function block diagram

Table 34.

Timer_value - timer value register (address 10h) bit description

Bit

Symbol

Value

Description

7to0

T[7:0]

0h[1] to

FFh

countdown timer value[2]

CountdownPeriod

SourceClockFrequency

---------------------------------------------------------------

PCF8564A Datasheet(PDF) 27 Page - NXP Semiconductors