W83792G Nuvoton Technology Corporation of America, W83792G Datasheet - Page 54

• Manufacturer Part Number: W83792G
• Description: IC MONITOR H/W 48-LQFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83792G

• Function: Hardware Monitor
• Topology: ADC, Fan Control, Register Bank
• 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

Reset Condition: Resume Reset, INIT.
Notice. To use SYNC T1/2/3 function, the corresponding FAN1, FAN2, or FAN3 must be enabled with
temperature cruise mode. Otherwise, only 2 DC output is available. One is full speed when exceeding
flag raised, and the other is start speed when not exceeding temperature limit.
User may not read out PRGVAL with 0xF when system power up, because the FAN will sequentially
powered on one by one. The order of FAN power on is followed the sequence 6-2-3-1-4-5.
At DC FAN mode, the output level and corresponding programmed value have the relation as
following table.
For Fan1, Fan2, and Fan 3, the output value will be affected by power-on-strap resistor. In the case of
using 100K resistor, the output drifts about 0.15V with normal value.
BIT
7
6-5
4
3-0
SYNC T1/2/3
PWM/DC
Reserve
FAN_DC[3:0]
PRGVAL
0000
0001
0010
0011
0100
0101
0110
0111
NAME
R/W
R/W
RO
R/W
ATTRIBUTE
OUTPUT LEVEL
(VOLT)
0.31
0.62
0.94
1.25
1.56
1.87
2.19
0
PWM/DC FAN Config.
Set 1, FANOUT is configured as PWM output.
Clear to 0, FANOUT is configured as DC output.
Sync with Temp Sensor.
00: Stand alone, does not sync with any temperature sensor
01: Sync with Temp1.
10: Sync with Temp2.
11: Sync with Temp3.
Reserved
Fan Duty Cycle. This 4-bit register determines the number of
input clock cycles, out of 16-cycle period, during which the
PWM output is high. During smart fan control mode, read this
register will return smart fan duty cycle. In Manual mode, write
this register to control the output PWM Duty cycle.
0h: PWM output is always logical Low.
Fh: PWM output is always logical High.
Xh: PWM output logical High percentage is (X/16*100%)
during one cycle.
- 48 -
PRGVAL
1000
1001
1010
1011
1100
1101
1110
1111
DESCRIPTION
W83792AD/AG/D/G
OUTPUT LEVEL
(VOLT)
2.50
2.81
3.12
3.44
3.75
4.06
4.37
4.69