ASC7611 ETC2 [List of Unclassifed Manufacturers], ASC7611 Datasheet - Page 33

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

Register 75h: Fan Spin-Up Mode
Register
Address
The PWM SU bit configures the PWM spin-up mode. If PWM SU is cleared the spin-up time will terminate after time
programmed by the Fan Configuration register has elapsed. When set to 1, the spin-up time will terminate early if the TACH
reading interpreted as RPM exceeds the Tach Minimum RPM value or after the time programmed by the Fan Configuration
register has elapsed, which ever occurs first. Note that the magnitudes of the tach readings and the limits in the registers
represent a time period that is inversely proportional to RPM.
This register becomes Read-only when the Ready/Lock/Start/Override register Lock bit is set. Any further attempts to write
to this register shall have no effect.
Miscellaneous Registers
Register 3Eh: Company ID
The company ID register contains the company identification number. For Andigilog this is 61h. This number is assigned by
Intel and is a method for uniquely identifying the part manufacturer. This register is read-only – a write to this register has no
effect.
Register 3Fh: Version/Stepping
The four least significant bits of the Version/Stepping register [3:0] contain the current stepping of the aSC7611 silicon. The
four most significant bits [7:4] reflect the aSC7611 base device number when set to a value of 0110b. For the aSC7611, this
register will read 01101001b (69h).
The register is used by application software to identify which device in the hardware monitor family has been implemented in
the given system. Based on this information, software can determine which registers to read from and write to. Further,
application software may use the current stepping to implement work-around for bugs found in a specific silicon stepping.
This register is read-only – a write to this register has no effect.
Register 6Fh: Test Register
Register
Address
© Andigilog, Inc. 2006
Register
Address
Register
Address
6Fh
75h
3Eh
3Fh
R/W
Read/
Read/
Write
Write
R/W
Read/
Read/
Write
Write
R
R
Fan Spin-
Up Mode
Test Register
Register
Company ID
Name
Register Name
Register Name
Version/Stepping
Register
Name
Disable
(MSB)
Tach4
Bit 7
(MSB)
Table 19 Zone Hysteresis Register Format
Bit 7
RES
Temperature
4°C (default)
(MSB)
(MSB)
VER3
Tach3/4
Bit 7
Bit 7
Disable
Bit 6
7
10°C
15°C
0°C
1°C
Bit 6
RES
VER2
Bit 6
Bit 6
Disable
www.andigilog.com
Tach2
6
Bit 5
Bit 5
RES
- 33 -
VER1
Zone Hysteresis Hn-[3:0]
Bit 5
Bit 5
Disable
Tach1
5
Bit 4
Bit 4
RES
VER0
Bit 4
Bit 4
0000
0001
0100
1010
1111
4
Bit 3
RES
Bit 3
RES
STP3
Bit 3
Bit 3
3
PWM3
Bit 2
Bit 2
RES
SU
STP2
Bit 2
Bit 2
PWM2
Bit 1
2
Bit 1
RES
SU
STP1
Bit 1
October 2006 - 70A05007
Bit 1
(LSB)
PWM1
Bit 0
1
(LSB)
Bit 0
SU
XEN
aSC7611
(LSB)
(LSB)
STP0
Bit 0
Bit 0
Default
Value
Default
0
Value
00
00h
Default
Default
Value
Value
61
69
Lock
Lock
X
X