EMC2102 Standard Microsystems Corporation, EMC2102 Datasheet - Page 42

• Manufacturer Part Number: EMC2102
• Description: Rpm-based Fan Controller with HW Thermal Shutdown
• Manufacturer: Standard Microsystems Corporation

Revision 1.95 (10-19-06)
6.14
53h
ADDRESS
2
0
0
0
0
1
1
1
1
1
0
0
The Fan Spin Up Configuration Register controls the settings of Spin Up Routine used by the RPM
based Fan Control Algorithm. The Fan Spin Up Configuration Register is software locked.
Bit 2 - LEVEL - determines the spin up level that is used whenever the Spin Up Routine is initiated
after power-up
Bit 1 -0 - SPINUP_TIME[2:0] - determines the maximum Spin Time that the Spin Up Routine will run
for (see
interrupt will be generated. When the RPM based Fan Control Algorithm is active, the fan driver will
attempt to re-start the fan immediately after the end of the last spin up attempt.
The Spin Time is set as shown in
Fan Spin Up Configuration Register
Fan Spin Up
Configuration
‘0’ (default) - the spin up level will be 60% of full scale.
‘1’ - the spin up level will be 75% of full scale.
UPDATE[2:0]
REGISTER
SPINUP_TIME[1:0]
Section
1
0
0
1
1
0
0
1
1
5.3.3). If a valid TACH is not detected before the Spin Time has elapsed, then an
Table 6.20 Fan TACH Configuration Register
-
B7
0
0
1
0
1
0
1
0
1
0
0
1
-
B6
Table 6.19 Update Time
Table 6.21 Spin Time
Table
DATASHEET
-
B5
6.21.
42
-
B4
RPM-Based Fan Controller with HW Thermal Shutdown
-
B3
TOTAL SPIN UP TIME
400ms (default)
UPDATE TIME
LEVEL
B2
500 ms (default)
1200ms
1600ms
100ms
200ms
300ms
500ms
800ms
250 ms
SPINUP_TIM
E [1:0]
B1
B0
SMSC EMC2102
01h
DEFAULT
Datasheet