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W83781D Datasheet(PDF) 9 Page - Winbond |
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W83781D Datasheet(HTML) 9 Page - Winbond |
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9 / 54 page  W83781D/W83781G Publication Release Date: April 14, 2005 - 5 - Revision 2.0 PIN NAME PIN NO. TYPE DESCRIPTION IOR# 1 INts An active low standard ISA bus I/O Read Control. IOW# 2 INts An active low standard ISA bus I/O Write Control. CLKIN 3 INt System clock input. Can select 48MHz or 24MHz or 14.318MHz. The default is 24MHz. D7~D0 4-11 I/O12t Bi-directional ISA bus Data lines. D0 corresponds to the low order bit, with D7 the high order bit. VID1 12 INt Voltage Supply readouts from P6.This value is read in the VID/Fan Divisor Register. VCC (+5V) 13 POWER +5V VCC power. Bypass with the parallel combination of 10 μF (electrolytic or tantalum) and 0.1μF (ceramic) bypass capacitors. GNDD 14 DGROUND Internally connected to all digital circuitry. MR 15 INts Master reset input. CASEOPEN 16 I/O12t 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. VID4 17 INt Voltage Supply readouts from P6.This value is read in the bit <0> of Device ID Register. FAN3-FAN1 IN/OUT 18-20 I/O12ts 0V to +5V amplitude fan tachometer input / Fan on-off control output. These multifunctional pins can be programmable input or output. SCL 21 INts Serial Bus Clock. SDA 22 I/O12ts Serial Bus bi-directional Data. RSTOUT# 23 OUT8t 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. VID2 24 INt Voltage Supply readouts from P6.This value is read in the VID/Fan Divisor Register. VID3 25 INt Voltage Supply readouts from P6.This value is read in the VID/Fan Divisor Register. BEEP/GPO# 26 OD48 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. GNDA 27 AGROUND Internally connected to all analog circuitry. The ground reference for all analog inputs. -5VIN 28 AIN Ground-referred inverting op amp input. -5VOUT 29 AOUT Output of inverting op amp for Input 6. -12VOUT 30 AOUT Output of inverting op amp for Input 5. |
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