TMP411CD datasheet(38/61 Pages) TI2

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8.11 Consecutive Alert Register

The value in the Consecutive Alert Register (address 22h) determines how many consecutive out-of-limit

measurements must occur on a measurement channel before the ALERT signal is activated. The value in

this register does not effect bits in the Status Register. Values of one, two, three, or four consecutive conversions

can be selected; one conversion is the default. The function allows additional filtering for the ALERT pin. The

consecutive alert bits are listed in Table 8-7:

Table 8-7. Consecutive Alert Register

CONSECUTIVE ALERT REGISTER (READ = 22h, WRITE = 22h, POR = 01h)

NUMBER OF CONSECUTIVE OUT OF

LIMIT MEASUREMENTS

Note

Bit 7 of the Consecutive Alert Register controls the enable/disable of the timeout function. See the

Timeout Function section for a description of this feature.

8.12 THERM Hysteresis Register

The THERM Hysteresis Register, shown in Table 8-9, stores the hysteresis value for the THERM pin alarm

function. This register must be programmed with a value that is less than the Local Temperature High Limit

THERM Limit Register value, otherwise the respective temperature comparator does not trip on the falling edges

of the measured temperature. Permitted hysteresis values are listed in Table 8-8. The default hysteresis value is

10°C, whether the device is operating in the standard or extended mode setting.

Table 8-8. Allowable THERM Hysteresis Values

TEMPERATURE (°C)

THERM HYSTERESIS VALUES

TH [11:1]

(STANDARD BINARY)

(HEX)

0000 0000

0000 0001

0000 0101

0000 1010

0001 1001

0011 0010

0100 1011

100

0110 0100

125

0111 1101

127

0111 1111

150

1001 0110

175

1010 1111

200

1100 1000

225

1110 0001

255

1111 1111

TMP411, TMP411D

SBOS383E – DECEMBER 2006 – REVISED JULY 2025

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