DS1307_06 Datasheet, PDF (13/15 Pages) Maxim Integrated Products – 64 x 8, Serial, I2C Real-Time Clock

DS1307 64 x 8, Serial, I²C Real-Time Clock
Figure 6. Data Read (Write Pointer, Then Read)—Slave Receive and Transmit
<Slave Address>
<Word Address (n)>
<Slave Address>
S 1101000 0 A XXXXXXXX A Sr 1101000 1 A
<Data(n)>
<Data(n+1)>
<Data(n+2)>
<Data(n+X)>
XXXXXXXX A XXXXXXXX A XXXXXXXX A ... XXXXXXXX A P
S - Start
Sr - Repeated Start
A - Acknowledge (ACK)
P - Stop
A - Not Acknowledge (NACK)
Master to slave
Slave to master
DATA TRANSFERRED
(X+1 BYTES + ACKNOWLEDGE); NOTE: LAST DATA BYTE IS
FOLLOWED BY A NOT ACKNOWLEDGE (A) SIGNAL)
TYPICAL OPERATING CIRCUIT
V _CC
V _CC
V _CC
R _PU
R _PU
CRYSTAL
CPU
R_PU = t_r/C_b
X1 X2
V _CC
SCL
SQW/OUT
DS1307
SDA
GND
V _BAT
PIN CONFIGURATIONS
TOP VIEW
X1 ^{1 8 V}CC
X2 ^{2 7} SQW/OUT
V_BAT 3 6 _SCL
GND ^{4 5} SDA
PDIP (300 mils)
X1 1 8 ^VCC
X2 2 7 SQW/OUT
V_BAT 3 6 _SCL
GND 4 5 SDA
SO (150 mils)
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