emc2101 Standard Microsystems Corp., emc2101 Datasheet - Page 46

• Manufacturer Part Number: emc2101
• Description: Emc2101 Fan Control With 1?c Accurate Temperature Monitoring
• Manufacturer: Standard Microsystems Corp.

Revision 2.53 (02-19-08)
6.23
ADDR.
BFh
1
0
0
1
1
The table should be loaded with the lowest temperature in the T1 register (50h) and increasing in
temperature for all settings.
See
for each temperature threshold follow the same behavior as the Fan Setting Register (see
Section
The Averaging Filter Register controls the level of digital averaging that is used for the External Diode
temperature measurements as well as the configuration of the ALERT / TACH pin functionality.
Bit 2 - 1 - FILTER[1:0] - control the level of digital filtering that is applied to the External Diode
temperature measurements as shown in
the filter behavior.
Bit 0 - ALERT_COMP - determines the functionality of the ALERT / TACH pin.
Averaging Filter Register
R/W
R/W
‘0’ (default) - the ALERT / TACH pin is configured to act as an interrupt (see
‘1’ - the ALERT / TACH pin is configured to operate as a temperature comparator (see
Section
Section 5.6.4
6.18).
FILTER[1:0]
Averaging Filter
5.4.1).
REGISTER
for description of the Fan Control Look Up Table operation. The fan speed settings
Table 6.29 Averaging Filter Register
0
0
1
0
1
Table 6.30 Averaging Settings
B7
-
DATASHEET
B6
-
Table
B5
46
-
Disabled (default)
Level 1
Level 1
Level 2
SMBus Fan Control with 1°C Accurate Temperature Monitoring
6.30. See
B4
-
B3
-
Figure 5.5
FILTER[1:0]
B2
AVERAGING
and
B1
Figure 5.6
ALERT_
COMP
B0
Section
for examples on
SMSC EMC2101
DEFAULT
5.4.2).
Datasheet
00h