W83791G Datasheet, PDF (14/99 Pages) Winbond – Winbond H/W Monitoring IC

W83791D/G
PIN DESCRIPTION, continued
PIN NAME PIN NO. TYPE
DESCRIPTION
VDD (5V)
13 POWER +5V VDD power. Bypass with the parallel combination of
10μF (electrolytic or tantalum) and 0.1μF (ceramic) bypass
capacitors.
GNDD
14 DGROU Internally connected to all digital circuitry.
ND
SLOTOCC#
15
IN_ts
CPU presence signal. 0 means CPU is present. 1 means
CPU is absent.
CASEOPEN
16
I/O_6ts 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.
VID4
17
I/ O _{1 2 t s} Voltage Supply readouts from CPU. After programming,
this pin can be VID output to voltage regulator to generate
Vcore for CPU.
FAN3IN-
FAN1IN
18-20
IN_ts
0V to +5V amplitude fan tachometer input
SCL
SDA
PWMOUT3 /
VID_V90
21
IN_ts
Serial Bus Clock.
22
I/OD_8ts Serial Bus bi-directional Data.
23
OUT₁₂ 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.
IN_ts
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.
VID2
24
I/ O _{1 2 t s} Voltage Supply readouts from CPU. After programming,
this pin can be VID output to voltage regulator to generate
Vcore for CPU.
VID3
25
I/ O _{1 2 t s} Voltage Supply readouts from CPU. After programming,
this pin can be VID output to voltage regulator to generate
Vcore for CPU.
BEEP
26
OD₁₂ Alarm beep output. Normal, this pin is low. When abnormal
event happens, this pin will output alarm frequency.
GNDA
27 AGROUN Internally connected to all analog circuitry. The ground
D
reference for all analog inputs.
-5VIN
28
AIN 0V to 4.096V FSR Analog Inputs.
+5VSB
29 POWER This pin is power for W83791D/G. Bypass with the parallel
combination of 10μF (electrolytic or tantalum) and 0.1μF
(ceramic) bypass capacitors.
VBAT
30 POWER This pin is power for W83791D/G.
Publication Release Date: April 14, 2006
-8-
Revision 1.1