DS1086 Spread-Spectrum EconOscillator

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Chip Topology

TRANSISTOR COUNT: 10,000

SUBSTRATE CONNECTED TO GROUND

Package Information

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SLAVE

ACK

10

1

1

R/W

A0*

A1*

SLAVE

ACK

A2*

MSB

LSB

DEVICE IDENTIFIER

DEVICE

ADDRESS

READ/

WRITE

MSB

LSB

COMMAND/REGISTER ADDRESS

SLAVE

ACK

MSB

LSB

b7

b6

b5

b4

b3

b2

b1

b0

SLAVE

ACK

STOP

*THE ADDRESS DETERMINED BY A0, A1, AND A2 MUST

MATCH THE ADDRESS SET IN THE ADDR REGISTER.

DATA

TYPICAL 2-WIRE WRITE TRANSACTION

EXAMPLE 2-WIRE TRANSACTIONS (WHEN A0, A1, AND A2 ARE ZERO)

A) SINGLE BYTE WRITE

-WRITE OFFSET REGISTER

B) SINGLE BYTE READ

-READ OFFSET REGISTER

C) TWO BYTE WRITE

-WRITE DAC REGISTER

D) TWO BYTE READ

-READ DAC REGISTER

START

START

START

START

START

B0h

B0h

B0h

B0h

SLAVE

ACK

SLAVE

ACK

SLAVE

ACK

SLAVE

ACK

0Eh

0Eh

08h

08h

SLAVE

ACK

SLAVE

ACK

SLAVE

ACK

SLAVE

ACK

DATA

SLAVE

ACK

STOP

OFFSET

10110000

10110000

10110000

10110000

10110001

REPEATED

START

SLAVE

ACK

DAC MSB

MASTER

ACK

DAC LSB

DATA

MASTER

NACK

STOP

DATA

B1h

b7

b6

b5

b4

b3

b2

b1

b0

00001110

00001110

00001000

00001000

REPEATED

START

DATA

OFFSET

MASTER

NACK

STOP

SLAVE

ACK

10110001

B1h

STOP

SLAVE

ACK

DAC LSB

DATA

SLAVE

ACK

DAC MSB

DATA

Figure 7. 2-Wire Transactions