W83791G Nuvoton Technology Corporation of America, W83791G Datasheet - Page 33

• 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

Note. The IRQ interrupt action like SMI#, but the IRQ is level signal.
6.8.6
(1) Comparator Mode:
Temperature exceeding T
(Figure 13)
(2) Interrupt Mode:
Temperature exceeding T
temperature sensor 1 or sensor 2 or sensor 3 registers. Temperature exceeding T
and then temperature going below T
reading temperature sensor 1 or sensor 2 or sensor 3 registers. Once the OVT# is activated by
exceeding T
again. ( Figure 13)
(3) 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 exceeds the next
level. OVT# output will act the same manner when temperature goes down. (Figure 13-1)
T
SMI#
HYST
T
OI
Over-Temperature (OVT#) for W83791D/G temperature sensor 1/2/3
Figure 12-3. Comparator Interrupt Mode
O
, then reset, if the temperature remains above T
*
*
O
O
causes the OVT# output activated until the temperature is less than T
SMI#
causes the OVT# output activated indefinitely until reset by reading
T
T
HYST
*
OI
*Interrupt Reset when Interrupt Status Registers are read
Figure 12-5. One-Time Interrupt Mode
*
*Interrupt Reset when Interrupt Status Registers are read
HYST
will also cause the OVT# activated indefinitely until reset by
*
*
- 27 -
SMI#
T
T
HYST
OI
Figure 12-4. Two-Times Interrupt Mode
HYST
Publication Release Date: April 14, 2006
, the OVT# will not be activated
*
*
W83791D/G
O
, then OVT# reset,
*
Revision 1.1
*
HYST
.