W83791G Nuvoton Technology Corporation of America, W83791G Datasheet - Page 32

• 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

6.8.4
SMI# interrupt for fan is Two-Times Interrupt Mode. Fan count exceeding the limit, or exceeding and
then going below the limit (set at value ram index 3Bh and 3Ch), will causes an interrupt if the
previous interrupt has been reset by reading all the interrupt Status Register. (Figure 12-2)
6.8.5
(1) Comparator Interrupt Mode
Temperature exceeding T
Interrupt Status Register. Once an interrupt event has occurred by exceeding T
temperature remains above the T
completed. If an interrupt event has occurred by exceeding T
will not occur again. The interrupts will continue to occur in this manner until the temperature goes
below T
Temperature exceeding T
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 T
(3) One-Time interrupt mode
Temperature exceeding T
an interrupt. Once an interrupt event has occurred by exceeding T
interrupt will not occur again until the temperature exceeding T
(2) Two-Times Interrupt Mode
HYST
HYST
SMI# interrupt for W83791D Fan
SMI# interrupt for W83791D/G temperature sensor 1/2/3
SMI#
, the interrupt will not occur. (Figure 12-4)
Low limit
High limit
. (Figure 12-3)
Figure 12-1. Voltage SMI# Mode
O
*
O
O
causes an interrupt and then temperature going below T
causes an interrupt and then temperature going below T
causes an interrupt and this interrupt will be reset by reading all the
*
HYST
, the interrupt will occur again when the next conversion has
*
*Interrupt Reset when Interrupt Status Registers are read
*
- 26 -
O
, then reset, if the temperature remains above
O
O
Fan Count limit
. (Figure 12-5)
but has not been reset, the interrupts
Publication Release Date: April 14, 2006
SMI#
Figure 12-2. Fan SMI# Mode
O
, then going below T
W83791D/G
O
, then reset, if the
*
HYST
will not cause
HYST
Revision 1.1
*
will also
HYST,
an