PCF8583
NXP Semiconductors
Clock and calendar with 240 x 8-bit RAM
acknowledgement
from slave
acknowledgement
from slave
acknowledgement
from slave
acknowledgement
from slave
SLAVE ADDRESS
DATA
S
0
A
REGISTER ADDRESS
A
S
1
A
A
SLAVE ADDRESS
n bytes
R/W
R/W
auto increment
memory register address
(1)
no acknowledgement
from master
1
P
DATA
last byte
auto increment
memory register address
013aaa041
(1) At this moment master transmitter becomes master receiver and PCF8583 slave receiver becomes slave transmitter.
Fig 19. Master reads after setting word address (write word address; READ data)
acknowledgement
from slave
acknowledgement
from master
no acknowledgement
from master
1
A
A
DATA
1
P
S
SLAVE ADDRESS
DATA
R/W
n bytes
last byte
auto increment
register address
auto increment
register address
013aaa347
Fig 20. Master reads slave immediately after first byte (READ mode)
PCF8583
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© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 06 — 6 October 2010
18 of 37
NXP [ NXP ]
