DS1307 Datasheet, PDF (4/14 Pages) Dallas Semiconductor – 64 X 8 Serial Real Time Clock

TIMING DIAGRAM
DS1307 64 x 8, Serial, I²C Real-Time Clock
SDA
t_BUF
SCL
STOP START
t _LOW
t_HD:STA
t_R
t_F
t_HD:STA
t_HD:DAT
t_HIGH
SU:DAT
t_SU:STA
REPEATED
START
t_SU:STO
Figure 1. Block Diagram
X1
X2
V_CC
GND
V_BAT
SCL
SDA
C_L
C_L
POWER
CONTROL
1Hz/4.096kHz/8.192kHz/32.768kHz
MUX/
BUFFER
N
1Hz
Oscillator
and divider
CONTROL
LOGIC
DS1307
RAM
(56 X 8)
CLOCK,
CALENDAR,
AND CONTROL
REGISTERS
SERIAL BUS
INTERFACE
AND ADDRESS
REGISTER
USER BUFFER
(7 BYTES)
SQW/OUT
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