PCF8563 datasheet(24/45 Pages) NXP

24 / 45 page

PCF8563

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Product data sheet

Rev. 9 — 16 June 2011

24 of 45

NXP Semiconductors

PCF8563

Real-time clock/calendar

(1) At this moment master transmitter becomes master receiver and PCF8563 slave receiver becomes slave transmitter.

Fig 20. Master reads after setting register address (write register address; READ data)

SLAVE ADDRESS

R/W

DATA

013aaa041

auto increment

memory register address

last byte

R/W

n bytes

(1)

acknowledgement

from slave

acknowledgement

from slave

acknowledgement

from slave

acknowledgement

from slave

no acknowledgement

from master

auto increment

memory register address

SLAVE ADDRESS

DATA

Fig 21. Master reads slave immediately after first byte (READ mode)

SLAVE ADDRESS

DATA

acknowledgement

from slave

acknowledgement

from master

no acknowledgement

from master

R/W

auto increment

013aaa347

auto increment

n bytes

last byte

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