DS1307 64 x 8, Serial, I

13 of 15

A

XXXXXXXX

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)

DATA TRANSFERRED

(X+1 BYTES + ACKNOWLEDGE); NOTE: LAST DATA BYTE IS

FOLLOWED BY A NOT ACKNOWLEDGE (

A) SIGNAL)

Master to slave

Slave to master

...

A

XXXXXXXX

A

0

1101000

Sr

A

1

<Data(n)>

<Data(n+1)>

<Data(n+2)>

<Data(n+X)>

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

GND

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

GND

SQW/OUT

SCL

SDA

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