ADT7482ARMZ datasheet(15/24 Pages) AD

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ADT7482

Rev. 0 | Page 15 of 24

Table 14. Sample Offset Register Codes

Offset Value

0x11/0×34

0x12/0x35

−128°C

1000 0000

00 00 0000

−4°C

1111 1100

00 00 0000

−1°C

1111 1111

00 000000

−0.25°C

1111 1111

11 00 0000

0°C

0000 0000

00 00 0000

+0.25°C

0000 0000

01 00 0000

+1°C

0000 0001

00 00 0000

+4°C

0000 0100

00 00 0000

+127.75°C

0111 1111

11 00 0000

ONE-SHOT REGISTER

The one-shot register initiates a conversion and comparison

cycle when the ADT7482 is in standby mode, after which the

device returns to standby. Writing to the one-shot register

address (0×0F) causes the ADT7482 to perform a conversion

and comparison on both the local and the remote temperature

channels. This is not a data register as such, and it is the write

operation to Address 0×0F that causes the one-shot conversion.

The data written to this address is irrelevant and is not stored.

CONSECUTIVE ALERT REGISTER

The value written to this register determines how many out-of-

limit measurements must occur before an ALERT is generated.

The default value is that one out-of-limit measurement generates

an ALERT. The maximum value that can be chosen is 4. This

useful at the fastest three conversion rates, where no averaging

takes place. This register address is 0x22. For more information,

refer to Table 15.

Table 15. Consecutive ALERT Register Bit

Amount of Out-of-Limit

Measurements Required

yza× 000x

yza× 001x

yza× 011x

yza× 111x

1 Notes:

y = SMBus SCL timeout bit. Default = 0. See the Serial Bus Interface section

for more information.

z = SMBus SDA timeout bit. Default = 0. See the Serial Bus Interface section

for more information.

a = Mask Internal ALERTs.

x = Don’t care bit.

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