ADT7316 datasheet(21/32 Pages) AD

21 / 32 page

ADT7316/7317/7318

–21–

REV. PrN

PRELIMINARY TECHNICAL DATA

22h

External Analog Temp Offset

D8h

23h

VDD VHIGH Limit

C9h

24h

VDD VLOW Limit

62h

25h

Internal THIGH Limit

64h

26h

Internal TLOW Limit

C9h

27h

External THIGH

FFh

28h

External TLOW

00h

29h-4CH

RESERVED

4Dh

Device ID

01h/05h/09h

4Eh

Manufacturer’s ID

41h

4Fh

Silicon Revision

00h

50h-FFh

RESERVED

Interrupt Status 1 Register (Read only) [Add. = 00h]

This 8-bit read only register reflects the status of some of

the interrupts that can cause the INTERRUPT pin to go

active. This register is reset by a read operation or by a

software reset.

Table 7.

Interrupt Status 1 Register

N / A

*Default settings at Power-up.

Bit

Function

D 0

1 when Internal Temp Value exceeds THIGH limit

D 1

1 when Internal Temp Value exceeds TLOW limit

D 2

1 when External Temp Value exceeds THIGH limit

D 3

1 when External Temp Value exceeds TLOW limit

D 4

1 indicates a fault (open or short) for the external

temperature sensor.

Interrupt Status 2 Register (Read only) [Add. = 01h]

This 8-bit read only register reflects the status of the VDD

interrupt that can cause the INTERRUPT pin to go ac-

tive. This register is reset by a read operation or by a soft-

ware reset.

Table 8.

Interrupt Status 1 Register

N/A

0 *

N/A

*Default settings at Power-up.

Bit

Function

D 4

1 when VDD value exceeds corrosponding VHIGH and

VLOW limits

INTERNAL TEMPERATURE VALUE/VDD VALUE REG-

ISTER LSBs (Read only) [Add. = 03h]

This Internal Temperature Value and VDD Value Register

is a 8-bit read-only register. It stores the two LSBs of the

10-bit temperature reading from the internal temperature

sensor and also the two LSBs of the 10-bit supply voltage

reading.

Table 9.

Internal Temp/VDD LSBs

N/A

L S B

T 1

L S B

N/A

0 *

*Default settings at Power-up.

Bit

Function

D 0

LSB of Internal Temperature Value

D 1

B1 of Internal Temperature Value

D 2

LSB of VDD Value

D 3

B1 of VDD Value

EXTERNAL TEMPERATURE VALUE REGISTER

LSBS (Read only) [Add. = 04h]

This External Temperature Value is a 8-bit read-only

reading from the external temperature sensor.

Table 10.

External Temperature LSBs

N/A

T 1

L S B

N/A

0 *

*Default settings at Power-up.

Bit

Function

D 0

LSB of External Temperature Value

D 1

B1 of External Temperature Value

VDD VALUE REGISTER MSBS (Read only) [Add. = 06h]

This 8-bit read only register stores the supply voltage

value. The 8 MSBs of the 10-bit value are stored in this

Table 11.

VDD Value MSBs

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