Philips Semiconductors

Product data sheet

LM75A

Digital temperature sensor and thermal Watchdog

™

2004 Oct 05

14

SL01397

123456789

1234

56789

D7

D6

D5

D4

D3

D2

D1

A

D4

D3

D2

D1

A

D0

SCL (cont.)

SDA (cont.)

LS BYTE DATA

DEVICE

ACKNOWLEDGE

DEVICE

ACKNOWLEDGE

D7

D6

D5

P

STOP

123456789

1234

56789

1001

A2

A1

A0

P0

W

A

0000

00

P1

S

A

DEVICE ADDRESS

POINTER BYTE

SCL

SDA

START

WRITE

DEVICE

ACKNOWLEDGE

DEVICE

ACKNOWLEDGE

(next)

(next)

D0

MS BYTE DATA

Figure 9. Write Tos or Thyst register (2-byte data).

SL01396

123456789

1234

56789

1001

A2

A1

A0

R

A

D4

D3

D2

D1

A

′

D0

DEVICE ADDRESS

SCL (cont.)

SDA (cont.)

MS BYTE FROM DEVICE

READ

DEVICE

ACKNOWLEDGE

MASTER

ACKNOWLEDGE

D7

D6

D5

D4

D3

D2

D1

D0

D7

D6

D5

123456789

P

MASTER NOT

ACKNOWLEDGED

STOP

NA

LS BYTE FROM DEVICE

123456789

1234

56789

1001

A2

A1

A0

P0

W

A

0000

00

P1

S

A

DEVICE ADDRESS

POINTER BYTE

SCL

SDA

START

WRITE

DEVICE

ACKNOWLEDGE

DEVICE

ACKNOWLEDGE

0

RE-START

RS

(next)

(next)

Figure 10. Read Temp or Tos or Thyst register including Pointer byte (2-byte data).

SL01395

123456789

1234

56789

1001

A2

A1

A0

R

A

S

D4

D3

D2

D1

A

′

D0

DEVICE ADDRESS

SCL

SDA

MS BYTE FROM DEVICE

START

READ

DEVICE

ACKNOWLEDGE

MASTER

ACKNOWLEDGE

D7

D6

D5

D4

D3

D2

D1

D0

D7

D6

D5

123456789

P

MASTER NOT

ACKNOWLEDGED

STOP

NA

LS BYTE FROM DEVICE

Figure 11. Read Temp or Tos or Thyst register with preset Pointer (2-byte data).