LM81CIMT-31 National Semiconductor, LM81CIMT-31 Datasheet - Page 20

• Manufacturer Part Number: LM81CIMT-31
• Description: Serial Interface ACPI-Compatible Microprocessor System
• Manufacturer: National Semiconductor

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Functional Description
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
Register 1. Temperature conversion data less than or equal
to T
tivated until the temperature data exceeds (T
Exceeding T
be activated at the end of a conversion until the temperature
data is less than or equal to (T
terrupts 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
*
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
Register 1. An interrupt will be activated when the data of a
temperature conversion is less than or equal to T
rupt cannot again be activated until the data from a tempera-
ture conversion is greater than (T
will be activated when the data of a temperature conversion
is greater than T
til the data of a temperature conversion is less than or equal
to (T
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
*
Note: Interrupt resets occur only when interrupt Status Register 1 is read.
Note: Interrupt resets occur only when interrupt Status Register 1 is read.
LOW
FIGURE 14. Extended Repetitive Interrupt Mode
HIGH
FIGURE 15. Extended One-Time Interrupt
will activate interrupt. Interrupt will continue to be ac-
− T
HIGH
HYST
HIGH
activates interrupt. Interrupt will continue to
). T_CRIT_A interrupt is activated when
. Interrupt cannot again be activated un-
HYST
HYST
).
).
HIGH
LOW
− T
+ T
HYST
(Continued)
HYST
). T_CRIT_A in-
LOW
). An interrupt
DS100072-21
LOW
+ T
DS100072-20
. Inter-
HYST
).
20
Extended Comparator Mode is shown in Figure 16 and op-
erates in the following way: Interrupt is activated when the
data from a temperature conversion is less than or equal to
T
conversion exceeds (T
activate interrupt. This interrupt will be reset when data from
a temperature conversion is less than or equal to (T
T
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
*
Note: Interrupt resets occur only when interrupt Status Register 1 is read.
LOW
HYST
. Interrupt is reset when the data from a temperature
). T_CRIT_A interrupt is activated when the tempera-
FIGURE 16. Extended Comparator Mode
HYST
) resets it.
LOW
+ T
HIGH
). Exceeding T
DS100072-19
HIGH
HIGH
will
−