
P
P
- 33 - 
 Andigilog, Inc. 2006 
www.andigilog.com
October 2006 - 70A05007 
aSC7611
Temperature
Zone Hysteresis Hn-[3:0]
0
°
C 
1
°
C 
0000 
0001 
0100 
1010 
1111 
4
°
C (default) 
10
°
C 
15
°
C 
Table 19 Zone Hysteresis Register Format
Register 75h: Fan Spin-Up Mode  
Register 
Address 
Read/ 
Write 
Register 
Name 
Bit 7 
(MSB) 
Bit 6 
Bit 5 
Bit 4 
Bit 3 
Bit 2 
Bit 1 
Bit 0 
(LSB) 
Default 
Value 
Lock 
75h 
R/W 
Fan Spin-
Up Mode 
Tach4 
Disable 
Tach3/4 
Disable 
Tach2 
Disable 
Tach1 
Disable 
RES 
PWM3
SU 
PWM2
SU 
PWM1
SU 
00 
X 
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 
Register 
Address 
Read/ 
Write 
Register Name 
Bit 7 
(MSB)
Bit 6 
Bit 5 
Bit 4 
Bit 3 
Bit 2 
Bit 1 
Bit 0 
(LSB)
Default 
Value 
3Eh 
R 
Company ID 
7 
6 
5 
4 
3 
2 
1 
0 
61 
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 
Register 
Address 
Read/ 
Write 
Register Name 
Bit 7 
(MSB)
Bit 6 
Bit 5 
Bit 4 
Bit 3 
Bit 2 
Bit 1 
Bit 0 
(LSB) 
Default 
Value 
3Fh 
R 
Version/Stepping 
VER3 
VER2 
VER1 
VER0 
STP3 
STP2 
STP1 
STP0 
69 
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 
Read/ 
Write 
Register 
Name 
Bit 7 
(MSB) 
Bit 6
Bit 5 
Bit 4 
Bit 3 
Bit 2 
Bit 1 
Bit 0 
(LSB) 
Default 
Value 
Lock
6Fh 
R/W 
Test Register 
RES 
RES 
RES 
RES 
RES 
RES 
RES 
XEN 
00h 
X