pcf8563 NXP Semiconductors, pcf8563 Datasheet - Page 15

• Manufacturer Part Number: pcf8563
• Description: Real-time Clock/calendar
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCF8563_5
Product data sheet
Fig 15. Master reads after setting word address (write word address; read data)
Fig 16. Master reads slave immediately after first byte (read mode)
S
SLAVE ADDRESS
8.5.2 Clock/calendar read/write cycles
S
The I
Figure
register is to be accessed next. The upper four bits of the word address are not used.
Fig 14. Master transmits to slave receiver (write mode)
acknowledgement
SLAVE ADDRESS
R/W
from slave
2
0 A
C-bus configuration for the different PCF8563 read and write cycles is shown in
14,
Figure 15
S
WORD ADDRESS
acknowledgement
SLAVE ADDRESS
R/W
from slave
1 A
at this moment master transmitter
and
acknowledgement
becomes master receiver and
Rev. 05 — 17 July 2007
from slave
Figure
becomes slave transmitter
acknowledgement
PCA8563 slave receiver
A
n bytes
DATA
R/W
from slave
0 A
S
16. The word address is a 4-bit value that defines which
SLAVE ADDRESS
acknowledgement
auto increment
word address
WORD ADDRESS
from master
A
acknowledgement
acknowledgement
last byte
R/W
from slave
DATA
from slave
1
A
A
no acknowledgement
auto increment
word address
from master
last byte
n bytes
n bytes
DATA
DATA
DATA
1
mgl665
Real time clock/calendar
memory word address
memory word address
memory word address
P
no acknowledgement
auto increment
acknowledgement
auto increment
auto increment
acknowledgement
from master
from master
from slave
PCF8563
© NXP B.V. 2007. All rights reserved.
1
A
001aag133
A
mbd822
P
P
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