ASC7512 ETC2 [List of Unclassifed Manufacturers], ASC7512 Datasheet - Page 29

• Manufacturer Part Number: ASC7512
• Description: DIGITAL TEMPERATURE SENSOR 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 exceeds the Tach Minimum value or after the time programmed by the Fan Configuration register has elapsed,
which ever occurs first.
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. After power up the default value is used whenever the Ready/Lock/Start/Override
register Start bit is cleared even though modifications to this register are possible.
Miscellaneous Registers
Register 3Eh, FEh: 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 aSC7512 silicon. The
four most significant bits [7:4] reflect the aSC7512 base device number when set to a value of 0110b. For the aSC7512, this
register will read 01101000b (62h).
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 70-7Fh: Vendor Specific Registers
These registers are for vendor specific features, including test registers. They will not default to a specific value on power
up.
© Andigilog, Inc. 2006
Register
Address
Register
Address
75h
3Eh
3Fh
Read/
Write
R/W
Read/
Read/
Write
Write
R
R
Fan Spin-Up
Mode
Company ID
Register Name
Register Name
Version/Stepping
Register
Name
(MSB)
Bit 7
RES
(MSB)
(MSB)
VER3
Bit 7
Bit 7
7
Bit 6
RES
VER2
Bit 6
Bit 6
www.andigilog.com
6
Bit 5
RES
- 29 -
VER1
Bit 5
Bit 5
5
Bit 4
RES
VER0
Bit 4
Bit 4
4
Bit 3
RES
STP3
Bit 3
Bit 3
3
Bit 2
RES
STP2
Bit 2
Bit 2
Bit 1
2
RES
STP1
Bit 1
Bit 1
August 2006 - 70A05003
(LSB)
PWM
Bit 0
1
SU
aSC7512
(LSB)
(LSB)
STP0
Bit 0
Bit 0
Default
Value
0
07
Default
Default
Value
Value
61
62
Lock
X