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© Andigilog, Inc. 2006
www.andigilog.com
October 2006 - 70A06010
aSC7621
Bit
Field
GPIO Configuration 2 [1Ah]
Value
Function
000 (Default)
GPIO PIN Read only Output drive always set high.
001
Zone 1 Therm Status, pin = 0, Zone 1 exceeds Fan Temp Limit
010
Zone 2 Therm Status, pin = 0, Zone 2 exceeds Fan Temp Limit
011
Zone 3 Therm Status, pin = 0, Zone 3 exceeds Fan Temp Limit
100
Zone 4 Therm Status, pin = 0, Zone 4 exceeds Fan Temp Limit
101
Any Zone Therm Status, pin = 0, Any Zone exceeds Fan Temp Limit
110
GPIO PIN Read only, Output drive always set high.
2-0
GPIO 3
Function
111
GPIO PIN IO Mode, Output drive set to GPIO Reg.Bit 3.
3
GPIO 3 Bit
Read of this bit always returns value of GPIO 3 IO Pin. Write to this function sends
value to GPIO 3 Pin when Function is IO mode.
Value
Function
000 (Default)
GPIO PIN Read only Output drive always set high.
001
Zone 1 Therm Status, pin = 0, Zone 1 exceeds Fan Temp Limit
010
Zone 2 Therm Status, pin = 0, Zone 2 exceeds Fan Temp Limit
011
Zone 3 Therm Status, pin = 0, Zone 3 exceeds Fan Temp Limit
100
Zone 4 Therm Status, pin = 0, Zone 4 exceeds Fan Temp Limit
101
Any Zone Therm Status, pin = 0, Any Zone exceeds Fan Temp Limit
110
GPIO PIN Read only Output drive always set high.
7:4
Alert
Assignment
111
GPIO PIN IO Mode Output drive set to GPIO Reg.Bit 7.
7
GPIO 2 Bit
Read of this bit always returns value of GPIO 2 IO Pin. Write to this function sends
value to GPIO 2 Pin when Function is IO mode.
Table 30 GPIO Configuration 2 [1Ah]
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
4WIRE
PECI
STP1
STP0
6C
The two least significant bits of the Version/Stepping register [1:0] contain the current stepping of the aSC7621 silicon. The
four most significant bits [7:4] reflect the aSC7621 base device number when set to a value of 0110b. For the aSC7621, this
register will read 01101100b (6Ch).
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.
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