PCF8564A datasheet(27/59 Pages) NXP

部品番号	PCF8564A

部品情報	Automotive tiny Real-Time Clock/calendar with alarm function and I2C-bus

PDF	59 Pages

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メーカー	NXP [NXP Semiconductors]

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PCA85063A

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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

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