ASC7611 ETC2 [List of Unclassifed Manufacturers], ASC7611 Datasheet - Page 3

• Manufacturer Part Number: ASC7611
• Description: HARDWARE MONITOR WITH INTEGRATED FAN CONTROL
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

Pin Descriptions
© Andigilog, Inc. 2006
SMBDAT
SMBCLK
VID0
VID1
VID2
VID3
VID4
3.3V
GND
5V
12V
2.5V
VCCP
Remote 1+
Remote 1-
Remote 2+
Remote 2-
TACH1
TACH2
TACH3/AddressEnable
TACH4/AddressSelect
Symbol
Pin
19
20
21
22
23
18
17
16
15
11
12
14
1
2
5
6
7
8
4
3
9
(Open-Drain)
Digital Input
Digital Input
Digital Input
Digital Input
Digital Input
Digital Input
POWER
GROUND
Analog Input
Analog Input
Analog Input
Remote Thermal
Diode Positive
Input
Remote Thermal
Diode Negative
Input
Remote Thermal
Diode Positive
Output
Remote Thermal
Diode Negative
Input
Digital Input
Digital Input
Digital Input
Digital I/O
Analog Input
Digital Input
Type
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- 3 -
System Management Bus Data. Open-drain output. 5V
tolerant, SMBus 2.0 compliant.
System Management Bus Clock. Tied to Open-drain
output. 5V tolerant, SMBus 2.0 compliant.
Voltage identification signal from the processor. This value
is read in VID0-VID4 Status Register.
Voltage identification signal from the processor. This value
is read in VID0-VID4 Status Register.
Voltage identification signal from the processor. This value
is read in VID0-VID4 Status Register.
Voltage identification signal from the processor. This value
is read in VID0-VID4 Status Register.
Voltage identification signal from the processor. This value
is read in VID0-VID4 Status Register.
+3.3V pin. Can be powered by +3.3V Standby power if
monitoring in low power states is required. This pin should
be bypassed with a 0.1μF capacitor in parallel with 100pF.
A bulk capacitance of approximately 10μF needs to be in
near vicinity of the aSC7611.
Ground for all analog and digital circuitry.
Analog Input for +5V monitoring.
Analog Input for +12V monitoring.
Analog Input for +2.5V monitoring..
Analog Input for VCCP (processor voltage) monitoring.
Positive input (current source) from the first remote thermal
diode Serves as the positive input into the A/D. Connected
to THERMDA pin of Pentium processor.
Negative input (current sink) from the first remote thermal
diode Serves as the negative input into the A/D. Connected
to THERMDC pin of Pentium processor.
Positive input (current source) from the first remote thermal
diode Serves as the positive input into the A/D. Connected
to the base of a diode connected MMBT3904 NPN
transistor.
Negative input (current sink) from the first remote thermal
diode Serves as the negative input into the A/D. Connected
to the emitter of a diode connected MMBT3904 NPN
transistor.
Input for monitoring tachometer output of fan 1.
Input for monitoring tachometer output of fan 2.
Input for monitoring tachometer output of fan 3. During
power-up, if held low through a 10KΩ resistor, SMBus
address may be selected based on the state of TACH4 pin.
Input for monitoring tachometer output of fan 4. If in
Address Select Mode, determines the SMBus address of
aSC7611.
Name and Function/Connection
October 2006 - 70A05007
aSC7611