W83791G Nuvoton Technology Corporation of America, W83791G Datasheet - Page 50

• Manufacturer Part Number: W83791G
• Description: IC MONITOR H/W 48-LQFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83791G

• Function: Hardware Monitor
• Topology: ADC
• Sensor Type: External
• Sensing Temperature: External Sensor
• Output Type: I²C™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.36 SMI#/OVT# Property Select ⎯ Index 4Ch (Bank 0)
Power on default: 01h
7-6
5-4
3
BIT
TEMP_SMI_MD
[1:0]
OVT_MD[1:0]
EN_OVT3
NAME
R/W
R/W
R/W
ATTRIBUTE
Temperature SMI# Mode Select.
<00> - Comparator Interrupt Mode:
Temperature 1/2/3 exceeds T
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
an interrupt and then temperature going below T
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
the temperature remains above the T
<10> - One Time Interrupt Mode:
This bit use in temperature sensor 1/2/3 interrupt mode
with hysteresis type. Temperature exceeding T
temperature, defined in Bank 1/2) causes an interrupt and
then
temperature, defined in Bank 1/2) will not cause an
interrupt. Once an interrupt event has occurred by
exceeding T
occur again until the temperature exceeding T
OVT# Mode Select. There are three OVT# signal output
type.
<00> - Comparator Mode: (Default)
Temperature exceeding T
activated until the temperature is less than T
<01> - Interrupt Mode:
Setting temperature exceeding T
activated indefinitely until reset reading temperature sensor
1/2/3 registers. Temperature exceeding T
reset, and then temperature going below T
cause the OVT# activated indefinitely until reset by reading
temperature sensor 1/2/3. Once the OVT# will not be
activated by exceeding T
remains above T
<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.
temperature
- 44 -
O
, then going below T
HYST
, the OVT# will not be activated again.
DESCRIPTION
going
Publication Release Date: April 14, 2006
O
, then reset, if the temperature
O
below
causes the OVT# output
O
O
HYST
(Over-temperature) limit
causes the OVT# output
HYST
, and interrupt will not
W83791D/G
T
.
HYST
HYST
O
O
, then reset, if
, then OVT#
HYST
O
.
(Hysteresis
.
O
Revision 1.1
, causes
O
will also
HYST
(Over-
will