W83791G Nuvoton Technology Corporation of America, W83791G Datasheet - Page 55

• 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

FAN 4/5 Divisor Control ⎯ Index 5Ch (Bank 0) , continued
7.48 VBAT Monitor Control Register ⎯ Index 5Dh (Bank 0)
Power on default: 00h; Reset by MR.
7.49 ACPI Temperature Increment Register ⎯ Index 5Eh
Power on default: 05h; Reset by MR.
2:0
7
6
5
4
3
2
1
0
7
6-0
BIT
BIT
BIT
FAN DIV3_B2
FANDIV2_B2
FANDIV1_B2
EN_ALARM_R
SP
BJTS3
BJTS2
BJTS1
EN_VBAT_MNT
Reserved
DIFFREG[6:0]
FAN_DIV4
NAME
NAME
NAME
ATTRIBUTE
R/W
ATTRIBUTE
ATTRIBUTE
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
FAN4 Speed Divisor.
<2:0> = 000 - divide by 1(Default);
<2:0> = 001 - divide by 2;
<2:0> = 010 - divide by 4;
<2:0> = 011 - divide by 8.
<2:0> = 100 - divide by 16.
<2:0> = 101 - divide by 32.
<2:0> = 110 - divide by 64
<2:0> = 111 - divide by 128.
Reserved.
ACPI Temperature Increment Register. If set to this
register to non-zero value, the OVT# signal will be activated
at pointer of the temperature of times of DIFFREG (i.e.
DIFFREG*n, where n is non-zero integer). The default value
is 5 degree C.
FAN 3 divisor Bit 2. The bit 1-0 is defined in the Index 4Bh.
FAN 2 divisor Bit 2. The bit 1-0 is defined in the Index 47h.
FAN 1 divisor Bit 2. The bit 1-0 is defined in the Index 47h.
Enable Alarm Response if set to 1.
Temperature Sensor 3 type selection. Set to 1, select
bipolar sensor. Set to 0, select thermistor sensor.
Temperature Sensor 2 type selection.Set to 1, select bipolar
sensor. Set to 0, select thermistor sensor.
Temperature sensor 1 type selection. Set to 1, select bipolar
sensor. Set to 0, select thermistor sensor.
Write 1, enable battery voltage monitor. Write 0, disable
battery voltage monitor. If enable this bit, the monitor value is
value after one monitor cycle. Note that the monitor cycle
time is at least 300 ms for W83791D/G.
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DESCRIPTION
DESCRIPTION
DESCRIPTION
Publication Release Date: April 14, 2006
W83791D/G
Revision 1.1