W83697HF/F
9.6 OVT# interrupt mode
The OVT# signal is only related with temperature sensor 2.
9.6.1 The W83697HF temperature sensor 2 Over-Temperature (OVT#) has the following
modes
(1) Comparator Mode(Default):
Setting Bank1/2 CR[52h] bit 2 to 0 will set OVT# signal to comparator mode. Temperature
exceeding T causes the OVT# output activated until the temperature is less than THYST. ( Figure
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9.12)
(2) Interrupt Mode:
Setting Bank1/2 CR[52h] bit 2 to 1 will set OVT# signal to interrupt mode. Setting Temperature
exceeding T causes the OVT# output activated indefinitely until reset by reading temperature
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sensor 2 or sensor 3 registers. Temperature exceeding T , then OVT# reset, and then temperature
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going below THYST will also cause the OVT# activated indefinitely until reset by reading temperature
sensor2 or sensor 3 registers. Once the OVT# is activated by exceeding T , then reset, if the
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temperature remains above THYST , the OVT# will not be activated again.( Figure 9.12)
Temperature sensor 2 and 3 Over-Temperature output (OVT#) in ACPI mode
Setting CR[4Ch] bit 1 to 1 will set OVT# signal to ACPI mode. At this mode, temperature exceeding
one level of temperature separation, starting from 0 degree, causes the OVT# output activated.
OVT# will be activated again once temperature exceeding the next level. OVT# output will act the
same manner when temperature goes down. (Figure 17,18). If temperature goes around the
current level, the OVT# will not act.(Refer the arrow in the figure). The granularity of temperature
separation between each OVT# output signal can be programmed at Bank0 CR[5Fh].
The priority of this mode is higher than Comparator mode and Interrupt mode .
Publication Release Date: Feb. 2002
- 94 -
Revision 0.70
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