PCA8565TS Philips Semiconductors, PCA8565TS Datasheet - Page 14

• Manufacturer Part Number: PCA8565TS
• Description: Real time clock/calender
• Manufacturer: Philips Semiconductors

Philips Semiconductors
9397 750 10695
Product data
Fig 11. Master transmits to slave receiver (write mode).
Fig 12. Master reads after setting word address (write word address; read data).
Fig 13. Master reads slave immediately after first byte (read mode).
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S
SLAVE ADDRESS
9.5.2 Clock/calendar read/write cycles
acknowledgement
S
S
R/W
from slave
0 A
The I
Figure
which register is to be accessed next. The upper four bits of the word address are not
used.
SLAVE ADDRESS
SLAVE ADDRESS
2
WORD ADDRESS
C-bus configuration for the different PCA8565 read and write cycles is shown in
11,
Figure 12
acknowledgement
acknowledgement
R/W
R/W
from slave
from slave
0 A
1 A
at this moment master transmitter
acknowledgement
becomes master receiver and
Rev. 01 — 31 March 2003
from slave
becomes slave transmitter
WORD ADDRESS
and
A
PCA8565 slave receiver
n bytes
S
DATA
Figure
SLAVE ADDRESS
acknowledgement
acknowledgement
auto increment
word address
13. The word address is a 4-bit value that defines
from master
from slave
A
A
acknowledgement
R/W
from slave
1
n bytes
last byte
MCE172
DATA
DATA
A
memory word address
no acknowledgement
auto increment
acknowledgement
auto increment
word address
from master
n bytes
from slave
DATA
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
A
MGL665
1
memory word address
MBD822
last byte
Real time clock/calender
auto increment
P
acknowledgement
P
DATA
from master
memory word address
no acknowledgement
auto increment
PCA8565
A
from master
1
P
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