DS1307 Maxim, DS1307 Datasheet - Page 4

• Manufacturer Part Number: DS1307
• Description: The DS1307 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM
• Manufacturer: Maxim

TIMING DIAGRAM
Figure 1. Block Diagram
GND
V
SDA
SDA
V
SCL
SCL
BAT
CC
X1
X2
STOP
t
BUF
START
AND ADDRESS
C
C
SERIAL BUS
INTERFACE
REGISTER
L
L
CONTROL
POWER
t
HD:STA
t
LOW
and divider
Oscillator
t
R
t
HD:DAT
1Hz/4.096kHz/8.192kHz/32.768kHz
t
F
t
HIGH
CONTROL
DS1307
4 of 14
LOGIC
1Hz
SU:DAT
REPEATED
START
DS1307 64 x 8, Serial, I
t
SU:STA
AND CONTROL
USER BUFFER
t
HD:STA
CALENDAR,
REGISTERS
BUFFER
(7 BYTES)
CLOCK,
MUX/
(56 X 8)
RAM
N
2
C Real-Time Clock
SQW/OUT
t
SU:STO