EMC2302 Standard Microsystems Corp., EMC2302 Datasheet - Page 39

• Manufacturer Part Number: EMC2302
• Description: Rpm-based Pwm Fan Controller
• Manufacturer: Standard Microsystems Corp.

ADDR
FDh
ADDR
EFh
ADDR
FEh
ADDR
Dual RPM-Based PWM Fan Controller
Datasheet
SMSC EMC2302
FFh
5.19
5.20
5.21
5.22
R/W
R/W
R/W
R
R/W
R
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 ID Register contains a unique 8-bit word that identifies the product.
The Manufacturer ID Register contains an 8-bit word that identifies SMSC.
The Revision Register contains an 8-bit word that identifies the die revision.
Software Lock Register
Product ID Register
Manufacturer ID Register
Revision Register
REGISTER
REGISTER
Product ID
Software
‘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.
Lock
Manufacturer ID
REGISTER
REGISTER
Revision
B7
B7
-
0
B7
1
Table 5.31 Manufacturer ID Register
Table 5.29 Software Lock Register
B7
0
B6
Table 5.30 Product ID Register
0
Table 5.32 Revision Register
B6
-
B6
0
B6
1
DATASHEET
B5
1
B5
-
B5
0
B5
39
0
B4
1
B4
B4
0
-
B4
1
B3
B3
0
0
B3
B3
-
1
B2
0
B2
B2
B2
1
1
-
B1
0
B1
0
B1
B1
-
Revision 1.2 (03-22-10)
1
B0
0
B0
1
LOCK
B0
B0
0
DEFAULT
DEFAULT
80h
DEFAULT
5Dh
DEFAULT
00h
36h