W83791G Nuvoton Technology Corporation of America, W83791G Datasheet - Page 14

• 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

PIN DESCRIPTION, continued
VDD (5V)
GNDD
SLOTOCC#
CASEOPEN
VID4
FAN3IN-
FAN1IN
SCL
SDA
PWMOUT3 /
VID_V90
VID2
VID3
BEEP
GNDA
-5VIN
+5VSB
VBAT
PIN NAME
PIN NO.
18-20
13
14
15
16
17
21
22
23
24
25
26
27
28
29
30
AGROUN
POWER
DGROU
POWER
POWER
I/O
I/O
I/O
I/OD
OUT
TYPE
I/O
OD
AIN
ND
IN
IN
IN
IN
D
1 2 t s
1 2 t s
1 2 t s
ts
6ts
ts
ts
ts
12
8ts
12
+5V VDD power. Bypass with the parallel combination of
10μF (electrolytic or tantalum) and 0.1μF (ceramic) bypass
capacitors.
Internally connected to all digital circuitry.
CPU presence signal. 0 means CPU is present. 1 means
CPU is absent.
CASE OPEN detection. An active high input from an
external device when case is Intruded. This signal can be
latched in external circuit which power is supplied by
VBAT, even if W83791D/G is power off.
Voltage Supply readouts from CPU. After programming,
this pin can be VID output to voltage regulator to generate
Vcore for CPU.
0V to +5V amplitude fan tachometer input
Serial Bus Clock.
Serial Bus bi-directional Data.
Fan speed control PWM output. When the power of VDD is
0v, this pin will drive logic 0. The power of this pin is
supplied by VSB 5V.
VID table selection trapping during RSMRST (0: Intel VRM
8.2/8.3; 1: Intel VRM 9.0). When the trapping pin get a
logic 1, the beep warning function is according to Intel
VRM 9.0 VID.
Voltage Supply readouts from CPU. After programming,
this pin can be VID output to voltage regulator to generate
Vcore for CPU.
Voltage Supply readouts from CPU. After programming,
this pin can be VID output to voltage regulator to generate
Vcore for CPU.
Alarm beep output. Normal, this pin is low. When abnormal
event happens, this pin will output alarm frequency.
Internally connected to all analog circuitry. The ground
reference for all analog inputs.
0V to 4.096V FSR Analog Inputs.
This pin is power for W83791D/G. Bypass with the parallel
combination of 10μF (electrolytic or tantalum) and 0.1μF
(ceramic) bypass capacitors.
This pin is power for W83791D/G.
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DESCRIPTION
Publication Release Date: April 14, 2006
W83791D/G
Revision 1.1