Applications Information

Power-Supply Decoupling

To achieve the best results when using the DS3514,

a 0.01µF or 0.1µF capacitor. Use a high-quality ceramic

surface-mount capacitor if possible. Surface-mount

components minimize lead inductance, which improves

performance, and ceramic capacitors tend to have

adequate high-frequency response for decoupling

applications.

SDA and SCL Pullup Resistors

SDA is an I/O with an open-collector output that

requires a pullup resistor to realize high-logic levels. A

master using either an open-collector output with a

pullup resistor or a push-pull output driver can be used

for SCL. Pullup resistor values should be chosen to

ensure that the rise and fall times listed in the

Electrical Characteristics are within specification. A typ-

ical value for the pullup resistors is 4.7k

Ω.

SLAVE

ADDRESS*

START

START

1

1

0

0

0

0

A0

R/W

SLAVE

ACK

SLAVE

ACK

SLAVE

ACK

MSB

LSB

MSB

LSB

MSB

LSB

b7

b6

b5

b4

b3

b2

b1

b0

READ/

WRITE

REGISTER ADDRESS

b7

b6

b5

b4

b3

b2

b1

b0

DATA

STOP

SINGLE-BYTE WRITE

-WRITE LATCH A

GM8 TO 00h

SINGLE-BYTE WRITE

-ENTER STANDBY MODE

SINGLE-BYTE READ

-READ LATCH A GM2

TWO-BYTE WRITE

- WRITE 10h AND 11h TO 80h

START

REPEATED

START

C1h

DATA

MASTER

NACK

STOP

1 1000000

00000 010

02h

11000 001

1 1000000

00001 000

C0h

08h

OOh

STOP

START 1 1000000

01000 001

C0h

41h

STOP

I/O STATUS

80h

*THE SLAVE ADDRESS IS DETERMINED BY ADDRESS PIN A0.

00 000 000

1 00 0 0 0 0 0

C0h

A)

C)

B)

D)

SLAVE

ACK

SLAVE

ACK

SLAVE

ACK

SLAVE

ACK

SLAVE

ACK

SLAVE

ACK

SLAVE

ACK

SLAVE

ACK

SLAVE

ACK

START 1 1000000

00010 000

C0h

10h

STOP

80h

1 00 0 0 0 0 0

SLAVE

ACK

SLAVE

ACK

SLAVE

ACK

80h

1 00 0 0 0 0 0

SLAVE

ACK

TWO-BYTE READ

- READ 10h AND 11h

E)

START 1 1000000

00010 000

C0h

10h

STOP

SLAVE

ACK

SLAVE

ACK

SLAVE

ACK

MASTER

ACK

C1h

DATA

DATA

1 10 0 0 0 0 1

MASTER

NACK

REPEATED

START

______________________________________________________________________________________

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