EMC2103 Standard Microsystems Corporation, EMC2103 Datasheet - Page 58

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

Revision 0.85 (01-29-08)
6.24
6.25
ADDR
ADDR
46h
45h
R/W
R/W
R/W
R/W
The Fan Configuration 2 Register is Software Locked.
The Gain Register stores the gain terms used by the proportional and integral portions of the RPM
based Fan Speed Control Algorithm. These terms will affect the FSC closed loop acquisition,
overshoot, and settling as would be expected in a classic PID system.
The Fan Spin Up Configuration Register controls the settings of Spin Up Routine.
Gain Register
Fan Spin Up Configuration Register
1
0
0
1
1
1
0
0
1
1
GAIND OR GAINP OR GAINI [1:0]
Configuration
Fan Spin Up
REGISTER
Gain Register
ERR_RNG[1:0]
REGISTER
Table 6.38 Fan Spin Up Configuration Register
DRIVE_FAIL
B7
_CNT [1:0]
Table 6.35 Error Range Options
B7
-
Table 6.36 Gain Register
Table 6.37 Gain Decode
0
0
1
0
1
B6
DATASHEET
B6
-
0
0
1
0
1
NOK
ICK
B5
58
GAIND[1:0]
B5
B4
B4
SPIN_LVL[2:0]
RPM-Based Fan Controller with HW Thermal Shutdown
B3
B3
GAINI[1:0]
B2
RESPECTIVE GAIN FACTOR
B2
0 RPM (default)
OPERATION
100 RPM
200 RPM
50 RPM
SPINUP_TIME
B1
4x (default)
GAINP[1:0]
B1
[1:0]
1x
2x
8x
B0
B0
SMSC EMC2103
DEFAULT
DEFAULT
Datasheet
2Ah
19h