PCF8563BS NXP [NXP Semiconductors], PCF8563BS Datasheet - Page 15

• Manufacturer Part Number: PCF8563BS
• Description: Real-time clock/calendar
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCF8563_6
Product data sheet
8.5.1 Addressing
8.5.2 Clock/calendar read/write cycles
8.5 I
Before any data is transmitted on the I
addressed first. The addressing is always carried out with the first byte transmitted after
the start procedure.
The PCF8563 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 PCF8563 slave address is shown in
The I
Figure
register is to be accessed next. The upper four bits of the word address are not used.
2
Fig 12. Acknowledgement on the I
Fig 13. Slave address
C-bus protocol
2
C-bus configuration for the different PCF8563 read and write cycles is shown in
14,
by transmitter
data output
by receiver
data output
SCL from
Figure 15
master
condition
START
and
Rev. 06 — 21 February 2008
S
Figure
1
16. The word address is a 4-bit value that defines which
group 1
0
1
2
C-bus
2
1
C-bus, the device which should respond is
Figure
0
0
2
group 2
13.
0
1
mce189
R/W
not acknowledge
acknowledge
Real-time clock/calendar
8
acknowledgement
clock pulse for
PCF8563
© NXP B.V. 2008. All rights reserved.
9
mbc602
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