LM81 datasheet(21/33 Pages) NSC

21 / 33 page

Functional Description (Continued)

Extended Repetitive Interrupt Mode is shown in

Figure 14

and operates in the following way: Once activated, all inter-

rupts remain activated until reset by a read of the Interrupt

Status Register 1. Once activated all T_CRIT_A interrupts

remain activated until reset by a read of the Extended Mode

to T

LOW will activate interrupt. Interrupt will continue to be

activated until the temperature data exceeds (T

LOW

HYST). Exceeding THIGH activates interrupt. Interrupt will

continue to be activated at the end of a conversion until the

temperature data is less than or equal to (T

HIGH −THYST).

T_CRIT_A interrupts are activated when the temperature

exceeds T_CRIT. T_CRIT_A interrupts will no longer be

activated if the temperature data at the end of a conversion

is less than or equal to( T_CRIT − T

HYST).

Extended One-Time Interrupt Mode is shown in

Figure 15

and operates in the following way: Once activated all inter-

rupts remain activated until reset by a read of the Interrupt

Status Register 1. Once activated all T_CRIT_A interrupts

remain activated until reset by a read of the Extended Mode

temperature conversion is less than or equal to T

LOW. Inter-

rupt cannot again be activated until the data from a tempera-

ture conversion is greater than (T

LOW +THYST). An interrupt

will be activated when the data of a temperature conversion

is greater than T

HIGH. Interrupt cannot again be activated

until the data of a temperature conversion is less than or

equal to (T

HIGH −THYST). T_CRIT_A interrupt is activated

when the data from a temperature conversion is greater than

T_CRIT. Activation of an T_CRIT_A interrupt cannot occur

until the data from a temperature conversion is less than or

equal to ( T_CRIT − T

HYST).

Extended Comparator Mode is shown in

Figure 16 and

operates in the following way: Interrupt is activated when the

data from a temperature conversion is less than or equal to

LOW. Interrupt is reset when the data from a temperature

conversion exceeds (T

LOW +THIGH). Exceeding THIGH will

activate interrupt. This interrupt will be reset when data from

a temperature conversion is less than or equal to (T

HIGH −

HYST). T_CRIT_A interrupt is activated when the tempera-

ture exceeds T_CRIT. T_CRIT_A remains active until the

data from a temperature conversion is less than or equal to

(T_CRIT − T

HYST) resets it.

DS100072-20

*Note: Interrupt resets occur only when interrupt Status Register 1 is read.

FIGURE 14. Extended Repetitive Interrupt Mode

DS100072-21

*Note: Interrupt resets occur only when interrupt Status Register 1 is read.

FIGURE 15. Extended One-Time Interrupt

DS100072-19

*Note: Interrupt resets occur only when interrupt Status Register 1 is read.

FIGURE 16. Extended Comparator Mode

LM81 датащи(PDF) 21 Page - National Semiconductor (TI)

LM81 датащи(HTML) 21 Page - National Semiconductor (TI)

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

датащи скачать

ссылки URL