EMC2103 Standard Microsystems Corporation, EMC2103 Datasheet - Page 68

• Manufacturer Part Number: EMC2103
• Description: Rpm-based Fan Controller with HW Thermal Shutdown
• Manufacturer: Standard Microsystems Corporation

Revision 0.85 (01-29-08)
6.40
6.41
ADDR
ADDR
FCh
EFh
2
0
0
0
0
1
1
SHDN_SEL[2:0]
R/W
R/W
R/W
R
The Software Lock Register controls the software locking of critical registers. This register is software
locked.
Bit 0 - LOCK - this bit acts on all registers that are designated SWL. When this bit is set, the locked
registers become read only and cannot be updated.
The Product Features Register indicates which pin selected functionality is enabled.
Software Lock Register
Product Features Register
1
0
0
1
1
0
0
‘0’ (default) - all SWL registers can be updated normally.
‘1’ - all SWL registers cannot be updated and a hard-reset is required to unlock them.
REGISTER
REGISTER
Features
Product
Software
Lock
0
0
1
0
1
0
1
External Diode 1 Simple Mode - Beta
compensation disabled, REC disabled -
recommended for AMD CPU diodes
External Diode 1 Diode Mode - Beta
compensation disabled, REC enabled
External Diode 1 Transistor Mode - Beta
compensation enabled, REC enabled - -
recommended for Intel 45nm and 65mn CPU
diodes
Internal Diode Transistor Mode - Beta
compensation enabled, REC enabled
External Diode 2 Transistor Mode - Beta
compensation enabled, REC enabled
(EMC2103-2 only)
External Diode 1 Diode mode (EMC2103-1 only)
External Diode 1 Transistor Mode - Beta
compensation enabled, REC enabled
B7
B7
Table 6.57 Product Features Register
-
Table 6.58 SHDN_SEL[2:0] Encoding
-
Table 6.56 Software Lock
B6
B6
-
-
DATASHEET
DIODE MODE
B5
B5
-
-
68
B4
B4
-
-
RPM-Based Fan Controller with HW Thermal Shutdown
B3
B3
-
-
B2
B2
-
SHDN_SEL[2:0]
none
none
none
none
none
none
B1
-
B1
OTHER FEATURES
LOCK
B0
B0
SMSC EMC2103
DEFAULT
DEFAULT
Datasheet
00h
00h