PCF8563 datasheet(16/32 Pages) NXP

16 / 32 page

PCF8563_6

Product data sheet

Rev. 06 — 21 February 2008

16 of 32

NXP Semiconductors

PCF8563

Real-time clock/calendar

Fig 14. Master transmits to slave receiver (Write mode)

SLAVE ADDRESS

WORD ADDRESS

DATA

acknowledgement

from slave

acknowledgement

from slave

acknowledgement

from slave

R/W

auto increment

memory word address

mbd822

n bytes

Fig 15. Master reads after setting word address (write word address; read data)

SLAVE ADDRESS

WORD ADDRESS

SLAVE ADDRESS

acknowledgement

from slave

acknowledgement

from slave

acknowledgement

from slave

R/W

acknowledgement

from master

DATA

auto increment

memory word address

001aag133

no acknowledgement

from master

DATA

auto increment

memory word address

last byte

R/W

n bytes

at this moment master transmitter

becomes master receiver and

PCA8563 slave receiver

becomes slave transmitter

Fig 16. 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

word address

mgl665

auto increment

word address

n bytes

last byte

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