W83791G Nuvoton Technology Corporation of America, W83791G Datasheet - Page 51

• 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

SMI#/OVT# Property Select ⎯ Index 4Ch (Bank 0), continued.
7.37 FAN 1- 3 IN/OUT and BEEP Control Register ⎯ Index 4Dh (Bank 0)
Power on default [7:0]: 0001_0101; Reset by MR.
2
1
0
7
6
5
4
3
2
1
0
BIT
BIT
EN_OVT2
EN_OVT1
OVTPOL
DIS_ABN
Reserved
FANOPV3
FANINC3
FANOPV2
FANINC2
FANOPV1
FANINC1
NAME
NAME
R/W
R/W
R/W
R/W
R/W
R/W
R/W
ATTRIBUTE
R/W
R/W
R/W
ATTRIBUTE
Reserved.
Disable power-on abnormal the monitor voltage including
Vcore, and +3.3V. If these voltages exceed the limit value, the
pin of BEEP (Open Drain) will drives 300Hz and 600Hz
frequency signal. Write 1, the frequency will be disable.
Default 0. After power on, the system should set 1 to this bit to
1 in order to disable BEEP.
FAN 3 output value if FANINC3 sets to 0. Write 1, then pin 18
always generates logic high signal. Write 0, pin18 always
generates logic low signal. This bit is 0.
FAN3 Input Control. Set to 1, pin 18 acts as FAN clock input,
which is default value. Set to 0, this pin 18 acts as FAN control
signal and the output value of FAN control is set by this register
bit 5. This output pin can connect to power PMOS gate to
control FAN ON/OFF.
FAN 2 output value if FANINC2 sets to 0. Write 1, then pin 19
always generates logic high signal. Write 0, pin 19 always
generates logic low signal. This bit is 0.
FAN2 Input Control. Set to 1, pin 19 acts as FAN clock input,
which is default value. Set to 0, this pin 19 acts as FAN control
signal and the output value of FAN control is set by this register
bit 3. This output pin can connect to power NMOS gate to
control FAN ON/OFF.
FAN 1 output value if FANINC1 sets to 0. Write 1, then pin 20
always generates logic high signal. Write 0, pin20 always
generates logic low signal. This bit is 0.
FAN1 Input Control. Set to 1, pin 20 acts as FAN clock input,
which is default value. Set to 0, this pin 20 acts as FAN control
signal and the output value of FAN control is set by this register
bit 1. This output pin can connect to power PMOS gate to
control FAN ON/OFF.
Enable temperature sensor 2 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 OVT3.
Enable temperature sensor 1 over-temperature (OVT)
output .if set to 1. Default is 0, disable OVT1 output
through pin OVT#. The pin OVT# is wire OR with OVT2
and OVT3.
Over-Temperature Polarity. Write 0, OVT# active high.
Write 1, OVT# active low. Default is 1.
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DESCRIPTION
DESCRIPTION
Publication Release Date: April 14, 2006
W83791D/G
Revision 1.1