X1243 Datasheet, PDF (8/17 Pages) Xicor Inc. – Real Time Clock/Calendar/Alarm with EEPROM

X1243
SCL from
Master
1
Data Output
from Transmitter
8
9
Data Output
from Receiver
Start
Acknowledge
FIGURE 5. ACKNOWLEDGE RESPONSE FROM RECEIVER
Signals from
the Master
SDA Bus
Signals from
the Slave
S
t
a
r
Slave
t
Address
Word
Address 1
Word
Address 0
S
t
Data
o
p
1
1 11 0 0000 0
A
A
A
A
C
C
C
C
K
K
K
K
FIGURE 6. BYTE WRITE SEQUENCE
7 Bytes
23 Bytes
Address
=6
Address Pointer
Ends Here
Addr = 7
Address
40
Address
63
FIGURE 7. WRITING 30 BYTES TO A 64-BYTE PAGE STARTING AT ADDRESS 40.
Signals from
the Master
S
t
a
r
Slave
t
Address
Word
Address 1
Word
Address 0
(1 n 64)
Data
(1)
S
Data
t
(n)
o
p
SDA Bus
1
1 1 10 0 00 00
A
A
A
A
Signals from
C
C
C
C
the Slave
K
K
K
K
FIGURE 8. PAGE WRITE SEQUENCE
8
FN8249.0
April 28, 2005