ADT7316 datasheet(27/32 Pages) AD

27 / 32 page

ADT7316/7317/7318

–27–

REV. PrN

PRELIMINARY TECHNICAL DATA

negative than the value in this register. As it is an 8-bit

oC. Default value is

-55

oC.

Table 40.

Internal TLOW Limit

*Default settings at Power-up.

EXTERNAL THIGH LIMIT REGISTER (Read/Write) [Add.

= 27h]

If pins 7 and 8 are configured for the external temperature

sensor then this limit register is an 8-bit read/write regis-

ter which stores the 2’s complement of the external tem-

perature upper limit that will cause an interrupt and

activate the INTERRUPT output (if enabled). For this to

happen the measured External Temperature Value has to

be greater than the value in this register. As it is an 8-bit

Table 41.

External THIGH Limit

*Default settings at Power-up.

EXTERNAL TLOW LIMIT REGISTER (Read/Write) [Add.

= 28h]

If pins 7 and 8 are configured for the external temperature

sensor then this limit register is an 8-bit read/write regis-

ter which stores the 2’s complement of the external tem-

perature lower limit that will cause an interrupt and

activate the INTERRUPT output (if enabled). For this to

happen the measured External Temperature Value has to

be more negative than the value in this register. As it is an

8-bit register the temperature resolution is 1

oC.

Table 42.

External TLOW Limit

SCL

SDA

A2A1

P7P6

ACK. BY

ADT7316/17/18

STOP BY

MASTER

START BY

MASTER

FR AME 1

SERIAL BUS ADDRESS B YTE

FRAME 2

ADDRESS POINTER REGISTER BYTE

ACK. BY

ADT7316/17/18

SCL

SDA

ACK. BY

ADT7316/17/18

START BY

MASTER

FRAME 1

SERIAL BUS ADDRESS B YTE

FRAME 2

ADDRESS POINTER REGISTER BYTE

ACK. BY

ADT7316/17/18

ACK. BY

ADT7316/17/18

STOP BY

MASTER

FRAME 3

DATA BYTE

SCL (CONTINUED)

SDA (CONTINUED)

Figure 18. I2C - Writing to the Address Pointer Register followed by a single byte of data to the selected register

Figure 17. I2C - Writing to the Address Pointer Register to select a register for a subsequent Read operation

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