ASC7611 ETC2 [List of Unclassifed Manufacturers], ASC7611 Datasheet - Page 18

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

Register 42h: Interrupt Status Register 2
The Interrupt Status Register 2 bits will be automatically set, by the aSC7611, whenever a fault condition is detected.
Interrupt Status Register 2 identifies faults caused by temperature sensor error, fan speed dropping below minimum set by
the tachometer minimum register. Interrupt Status Register 2 will hold a set bit until the event is read by software. The
contents of this register will be cleared (set to 0) automatically by the aSC7611 after it is read by software, if fault condition
no longer exists. Once set, the Interrupt Status Register 2 bits will remain set until a read event occurs, even if the fault no
longer exists. This register is read-only – a write to this register has no effect.
Register 43h: VID Register
The VID register contains the values of aSC7611 VID0–VID4 input pins. This register indicates the status of the VID lines
that interconnect the processor to the Voltage Regulator Module (VRM). Software uses the information in this register to
determine the voltage that the processor is designed to operate at. With this information, software can then dynamically
determine the correct values to place in the VCCP Low Limit and VCCP High Limit registers. This register is read-only – a
write to this register has no effect.
Tachometer Measurement and Configuration
Register 28-2Fh: Fan Tachometer Reading
© Andigilog, Inc. 2006
Register
Address
Register
Address
Register
Address
2Ah
2Bh
2Ch
28h
29h
42h
43h
Bit
0
1
2
3
4
5
6
7
Read/
Read/
Write
Read/
Write
Write
Remote Diode
Remote Diode
R
R
R
R
R
R
R
12V Limits
Exceeded
STALLED
STALLED
STALLED
STALLED
1 Fault
2 Fault
Name
FAN 1
FAN 2
FAN 3
FAN 4
RES
Tach 1 LS Byte
Tach 1 MS Byte
Tach 2 LS Byte
Tach 2 MS Byte
Tach 3 LS Byte
VID0-4
Interrupt Status 2
Register Name
Register Name
Register Name
R/W
R
R
R
R
R
R
R
R
Default
Table 5 Interrupt Status Register 2
(MSB)
(MSB)
Bit 7
Bit 7
RES
15
15
0
0
0
0
0
0
0
0
7
7
7
(MSB)
ERR2
Bit 7
The aSC7611 automatically sets this bit to 1 when the 12V input voltage is
less than or equal to the limit set in the 12V Low Limit register or greater than
the limit set in the 12V High Limit register.
Reserved
The aSC7611 automatically sets this bit to 1 when the TACH 1 input reading is
above the count value set in the Tach 1 Minimum MSB and LSB registers.
The aSC7611 automatically sets this bit to 1 when the TACH 2 input reading is
above the count value set in the Tach 2 Minimum MSB and LSB registers.
The aSC7611 automatically sets this bit to 1 when the TACH 3 input reading is
above the count value set in the Tach 3 Minimum MSB and LSB registers.
The aSC7611 automatically sets this bit to 1 when the TACH 4 input reading is
above the count value set in the Tach 4 Minimum MSB and LSB registers.
The aSC7611 automatically sets this bit to 1 when there is an open circuit fault
on the Remote1+ or Remote1- thermal diode input pins. A diode fault will also
set bit 4 Zone 1 Limit bit, of Interrupt Status Register 1.
The aSC7611 automatically sets this bit to 1 when there is an open circuit fault
on the Remote2+ or Remote2- thermal diode input pins. A diode fault will also
set bit 6 Zone 3 Limit bit, of Interrupt Status Register 1.
Bit 6
RES
Bit 6
14
14
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6
6
6
ERR1
Bit 6
Bit 5
RES
- 18 -
Bit 5
13
13
5
5
5
FAN4
Bit 5
Bit 4
VID4
Bit 4
12
12
FAN3
Bit 4
4
4
4
Bit 3
VID3
Bit 3
Description
FAN2
11
11
Bit 3
3
3
3
Bit 2
VID2
Bit 2
FAN1
Bit 2
10
10
2
2
2
Bit 1
VID1
Bit 1
October 2006 - 70A05007
Bit 1
RES
1
9
1
9
1
aSC7611
(LSB)
Bit 0
VID0
(LSB)
(LSB)
Bit 0
Bit 0
12V
0
8
0
8
0
Default
Default
Default
Value
Value
Value
N/A
N/A
N/A
N/A
N/A
00
00