emc2105 Standard Microsystems Corp., emc2105 Datasheet - Page 56

• Manufacturer Part Number: emc2105
• Description: Emc2105 Rpm-based High Side Fan Controller With Hardware Thermal Shutdown
• Manufacturer: Standard Microsystems Corp.

ADDR
29h
Revision 1.74 (05-08-08)
6.16
R/W
R/W
REGISTER
Interrupt
Enable
Fan
Bit 4 - EXT4_INT_EN - Allows the External Diode 4 channel to assert the ALERT# pin.
Bit 3 - EXT3_INT_EN - Allows the External Diode 3 or VIN3 channel to assert the ALERT# pin.
Bit 2 - EXT2_INT_EN - Allows the External Diode 2 or VIN2 channel to assert the ALERT# pin.
Bit 1 - EXT1_INT_EN - Allows the External Diode 1 or VIN1 channel to assert the ALERT# pin.
Bit 0 - INT_INT_EN - Allows the Internal Diode channel to assert the ALERT# pin.
The Fan Interrupt Enable controls the masking for each Fan channel. When a channel is enabled, it
will cause the ALERT# pin to be asserted when an error condition is detected.
Bit 1 - SPIN_INT_EN - Allows the FAN_SPIN bit to assert the ALERT# pin.
Bit 0 - STALL_INT_EN - Allows the FAN_STALL bit or DRIVE_FAIL bit to assert the ALERT# pin.
Fan Interrupt Enable Register
‘1’ - The ALERT# pin will be asserted for an error condition associated with Voltage Channel 4.
‘0’ (default) - The ALERT# pin will be not be asserted for any error condition associated with
External Diode 4.
‘1’ - The ALERT# pin will be asserted for an error condition associated with External Diode 4.
‘0’ (default) - The ALERT# pin will not be asserted for any error condition associated with External
Diode 3 or VIN3 channels.
‘1’ - The ALERT# pin will be asserted for an error condition associated with External Diode 3 or
VIN3 channels.
‘0’ (default) - The ALERT# pin will not be asserted for any error condition associated with External
Diode 2 or VIN2 channels.
‘1’ - The ALERT# pin will be asserted for an error condition associated with External Diode 2 or
VIN2 channels.
‘0’ (default) - The ALERT# pin will not be asserted for any error condition associated with External
Diode 1 or VIN1 channels.
‘1’ - The ALERT# pin will be asserted for an error condition associated with External Diode 1 or
VIN1 channels.
‘0’ (default) - The ALERT# pin will not be asserted for any error condition associated with the
Internal Diode.
‘1’ - The ALERT# pin will be asserted for an error condition associated with the Internal Diode.
‘0’ (default) - the FAN_SPIN bit will not assert the ALERT# pin though it will still update the Status
Register normally.
‘1’ - the FAN_SPIN bit will assert the ALERT# pin.
‘0’ (default) - the FAN_STALL bit or DRIVE_FAIL bit will not assert the ALERT# pin though will still
update the Status Register normally.
‘1’ - the FAN_STALL or DRIVE_FAIL bit will assert the ALERT# pin if set.
B7
-
Table 6.21 Fan Interrupt Enable Register
B6
-
B5
DATASHEET
-
RPM-Based High Side Fan Controller with Hardware Thermal Shutdown
56
B4
-
B3
-
B2
-
INT_EN
SPIN_
B1
SMSC EMC2105
STALL_
INT_EN
Datasheet
B0
DEFAULT
00h