W83792AD/AG/D/G
Pin Description List, continued
PIN POWER
NO. PLANE
PIN NAME
TYPE
DESCRIPTION
Fan speed control PWM/DC output. When the power
FAN_OUT2
OUT12 of VDD is 0v, this pin will drive logic 0. The power of
this pin is supplied by VSB 5V.
15
16
5VSB
5VSB
I2C device address bit 1 trapping during 5VSB power
A1
INts
on.
Fan speed control PWM/DC output. When the power
of VDD is 0v, this pin will drive logic 0. The power of
this pin is supplied by VSB 5V.
FAN_OUT1
A0
I/O12t
INts
I2C device address bit 0 trapping during 5VSB power
on.
CLK
FANIN3
FANIN2
FANIN1
SCL
17
18
19
20
21
22
23
VDD
VDD
INts
INts
INts
INts
INts
14.318MHz System clock while VCC5V powered up.
0V to +5V amplitude fan tachometer input
0V to +5V amplitude fan tachometer input
0V to +5V amplitude fan tachometer input
Serial Bus Clock.
VDD
VDD
5VSB
5VSB
5VSB
SDA
I/OD12ts Serial Bus bi-directional data.
PWRBTN#
OD12
Power Button output for enable/disable power supply.
This pin is power for W83792D/G. Bypass with the
parallel combination of 10μF (electrolytic or tantalum)
and 0.1μF (ceramic) bypass capacitors.
+5VSB
24
-
POWER
THERMTRIP1#
FANIN7
Thermal Trip signal from CPU A. Low Active.
0~+5V FANIN 7 tachometer.
25
26
5VSB
5VSB
INts
INts
THERMTRIP2#
Thermal Trip signal from CPU B. Low Active.
Publication Release Date: April 26, 2006
- 9 -
Revision 0.9
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