1997 Mar 25

17

Philips Semiconductors

Product specification

Low power clock/calendar

PCF8593

9.1

Addressing

always carried out with the first byte transmitted after the start procedure.

The clock/calendar acts as a slave receiver or slave transmitter. Therefore the clock signal SCL is only an input signal,

but the data signal SDA is a bidirectional line. The clock/calendar slave address is shown in Fig.17.

9.2

Clock/calendar READ/WRITE cycles

Fig.17 Slave address.

handbook, halfpage

MBD821

101

00

0

1

R/W

group 1

group 2

Fig.18 Master transmits to slave receiver (WRITE) mode.

handbook, full pagewidth

S

0A

SLAVE ADDRESS

WORD ADDRESS

A

A

DATA

P

acknowledgement

from slave

acknowledgement

from slave

acknowledgement

from slave

R/W

auto increment

memory word address

MBD822

n bytes