W83781D Ver la hoja de datos (PDF) - Winbond
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W83781D Datasheet PDF : 54 Pages
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W83781D/W83781G
PIN NAME
IOR#
IOW#
CLKIN
D7~D0
VID1
VCC (+5V)
GNDD
MR
CASEOPEN
VID4
FAN3-FAN1
IN/OUT
SCL
SDA
RSTOUT#
VID2
VID3
BEEP/GPO#
GNDA
-5VIN
-5VOUT
-12VOUT
PIN NO.
1
2
3
4-11
12
13
14
15
16
17
18-20
21
22
23
24
25
26
27
28
29
30
TYPE
IN t s
IN t s
IN t
I/O12t
INt
POWER
DGROUND
IN t s
I/O12t
IN t
I/O12ts
INt s
I/O12ts
OUT8t
IN t
IN t
OD48
AGROUND
AIN
AOUT
AOUT
DESCRIPTION
An active low standard ISA bus I/O Read Control.
An active low standard ISA bus I/O Write Control.
System clock input. Can select 48MHz or 24MHz or
14.318MHz. The default is 24MHz.
Bi-directional ISA bus Data lines. D0 corresponds to the
low order bit, with D7 the high order bit.
Voltage Supply readouts from P6.This value is read in the
VID/Fan Divisor Register.
+5V VCC power. Bypass with the parallel combination of
10μF (electrolytic or tantalum) and 0.1μF (ceramic)
bypass capacitors.
Internally connected to all digital circuitry.
Master reset input.
CASE OPEN. An active high input from an external circuit
which latches a Case Open event. This line can go high
without any clamping action intrusion regardless of the
powered state of the W83781D/G. The W83781D/G
provides an internal open drain on this line, controlled by
Bit 7 of IRQ Mask Register 2, to provide a minimum 20 ms
reset of this line.
Voltage Supply readouts from P6.This value is read in the
bit <0> of Device ID Register.
0V to +5V amplitude fan tachometer input /
Fan on-off control output. These multifunctional pins can
be programmable input or output.
Serial Bus Clock.
Serial Bus bi-directional Data.
8 mA driver (open drain), active low output with a 20 ms
minimum pulse width. Available when enabled via Bit 7 in
SMI# Mask Register 2.
Voltage Supply readouts from P6.This value is read in the
VID/Fan Divisor Register.
Voltage Supply readouts from P6.This value is read in the
VID/Fan Divisor Register.
Beep function or General purpose output (active low).
This pin is open drain driving 48 mA.
This multifunctional pin is programmable selected by
CR4D bit 6.
Internally connected to all analog circuitry. The ground
reference for all analog inputs.
Ground-referred inverting op amp input.
Output of inverting op amp for Input 6.
Output of inverting op amp for Input 5.
Publication Release Date: April 14, 2005
-5-
Revision 2.0
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