Philips Semiconductors

Product data sheet

SA56004X

±1 °C accurate, SMBus-compatible, 8-pin, remote/local

digital temperature sensor with over temperature alarms

2004 Oct 06

18

SL02016

WRITE BYTE FORMAT (To write a data byte to the device register) :

12

345

67

89

12

345

67

89

SCLK

(TO NEXT)

SDATA

a6

a5

a4

a3

a2

a1

(TO NEXT)

SW

A

A

(CONT)

(CONT)

DEVICE ADDRESS

DEVICE REGISTER COMMAND

a0

D7

D6

D5

D4

D3

D2

D1

D0

12

345

67

89

SCLK

SDATA

D7

D6

D5

D4

D3

D2

P

A

DATA TO BE WRITTEN TO RGTR

D1

D0

READ BYTE FORMAT (To read a data byte from the device register) :

12

345

67

89

12

345

67

89

SCLK

(TO NEXT)

SDATA

a6

a5

a4

a3

a2

a1

(TO NEXT)

SW

A

A

(CONT)

(CONT)

DEVICE ADDRESS

DEVICE REGISTER COMMAND

a0

D7

D6

D5

D4

D3

D2

D1

D0

12

345

67

89

SCLK

SDATA

a6

a5

a4

a3

a2

a1

A

DEVICE ADDRESS

a0

P

12

345

67

89

STOP

RESTART

S

R

NA

DATA FROM DEVICE REGISTER

D7

D6

D5

D4

D3

D2

D1

D0

P

STOP

RECEIVE BYTE FORMAT (To read a data byte from already pointed register) :

(CONT)

(CONT)

12

345

67

89

SCLK

SDATA

a6

a5

a4

a3

a2

a1

A

DEVICE ADDRESS

a0

12

345

67

89

RESTART

S

R

NA

DATA FROM DEVICE REGISTER

D7

D6

D5

D4

D3

D2

D1

D0

P

SEND BYTE FORMAT:

12

345

67

89

12

345

67

89

SCLK

SDATA

a6

a5

a4

a3

a2

a1

SW

A

A

DEVICE ADDRESS

DEVICE REGISTER COMMAND

a0

D7

D6

D5

D4

D3

D2

D1

D0

P

STOP

Figure 17. SMBus interface protocols.