W83791G Datasheet, PDF (50/99 Pages) Winbond – Winbond H/W Monitoring IC

W83791D/G
7.36 SMI#/OVT# Property Select ⎯ Index 4Ch (Bank 0)
Power on default: 01h
BIT
NAME
7-6 TEMP_SMI_MD
[1:0]
5-4 OVT_MD[1:0]
3 EN_OVT3
ATTRIBUTE
R/W
R/W
R/W
DESCRIPTION
Temperature SMI# Mode Select.
<00> - Comparator Interrupt Mode:
Temperature 1/2/3 exceeds T_O (Over-temperature) limit
causes and interrupt and this interrupt will be reset by
reading all the Interrupt Staus.
<01> - Two Time Interrupt Mode:(Default)
This bit use in temperature sensor 1/2/3 interrupt mode
with hysteresis type. Temperature exceeding T_O, causes
an interrupt and then temperature going below T_HYST will
also cause an interrupt if the previous interrupt has been
reset by reading all the interrupt Status Register. Once an
interrupt event has occurred by exceeding T_O, then reset, if
the temperature remains above the T_HYST.
<10> - One Time Interrupt Mode:
This bit use in temperature sensor 1/2/3 interrupt mode
with hysteresis type. Temperature exceeding T_O (Over-
temperature, defined in Bank 1/2) causes an interrupt and
then temperature going below T_HYST (Hysteresis
temperature, defined in Bank 1/2) will not cause an
interrupt. Once an interrupt event has occurred by
exceeding T_O, then going below T_HYST, and interrupt will not
occur again until the temperature exceeding T_O.
OVT# Mode Select. There are three OVT# signal output
type.
<00> - Comparator Mode: (Default)
Temperature exceeding T_O causes the OVT# output
activated until the temperature is less than T_HYST.
<01> - Interrupt Mode:
Setting temperature exceeding T_O causes the OVT# output
activated indefinitely until reset reading temperature sensor
1/2/3 registers. Temperature exceeding T_O, then OVT#
reset, and then temperature going below T_HYST will also
cause the OVT# activated indefinitely until reset by reading
temperature sensor 1/2/3. Once the OVT# will not be
activated by exceeding T_O, then reset, if the temperature
remains above T_HYST, the OVT# will not be activated again.
<10> - ACPI Mode:
If set to 1 then enable ACPI OVT# output. Which always
send an OVT# signal when the temperature over the ACPI
temperature increment value defined at Index 5Eh.
Enable temperature sensor 3 over-temperature (OVT)
output if set to 1. Default is 0, disable OVT2 output through
pin OVT#. The pin OVT# is wire OR with OVT1 and OVT2.
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Publication Release Date: April 14, 2006
Revision 1.1