Datasheet

DS1307 64 x 8, Serial, I
2
C Real-Time Clock
13 of 15
AXXXXXXXX
1101000
S
XXXXXXXX A XXXXXXXX XXXXXXXX A P
<Slave Address> <Word Address (n)> <Slave Address>
S - Start
Sr - Repeated Start
A - Acknowledge (ACK)
P - Stop
A - Not Acknowledge (NACK)
<RW>
DATA TRANSFERRED
(X+1 BYTES + ACKNOWLEDGE); NOTE: LAST DATA BYTE IS
FOLLOWED BY A NOT ACKNOWLEDGE (A) SIGNAL)
Master to slave
Slave to master
...
AXXXXXXXXA0
1101000
Sr A1
<Data(n)> <Data(n+1)> <Data(n+2)> <Data(n+X)>
<RW>
A
Figure 6. Data Read (Write Pointer, Then Read)—Slave Receive and Transmit
TYPICAL OPERATING CIRCUIT
PIN CONFIGURATIONS
TOP VIEW
PDIP (300 mils)
X1
X2
V
BAT
GND
V
CC
SQW/OUT
SCL
1
2
3
4
8
7
6
5
SDA
SO (150 mils)
1
2
3
4
8
7
6
5
X1
X2
V
BAT
GND
V
CC
SQW/OUT
SCL
SDA
DS1307
DS1307
DS1307
CPU
V
CC
V
CC
V
CC
SDA
SCL
GND
X2 X1
V
CC
R
PU
R
PU
CRYSTAL
SQW/OUT
V
BAT
R
PU
= t
r
/C
b