EMC2103 Standard Microsystems Corporation, EMC2103 Datasheet - Page 52

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

Revision 0.85 (01-29-08)
6.16
6.17
ADDR
ADDR
2Ah
29
R/W
R/W
R/W
R/W
Bit 0 - INT_INT_EN - Allows the Internal Diode to assert the ALERT pin.
The Fan Interrupt Enable Register controls the masking for errors generated by the Fan Driver. When
a channel is masked, it will not 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.
The PWM Config Register controls the output type and polarity of the PWM output.
Bit 4 - PWM_OT - Determines the output type for the PWM pin.
Fan Interrupt Enable Register
PWM Configuration Register
‘1’ - The ALERT pin will be asserted for an error condition associated with External Diode 1
channel.
‘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 bit will assert the ALERT pin.
‘0’ (default) - The PWM pin is configured as an open drain output.
‘1’ - The PWM pin is configured as a push-pull output.
REGISTER
REGISTER
Interrupt
Enable
Config
PWM
Fan
B7
Table 6.22 Fan Interrupt Enable Register
B7
Table 6.23 PWM Configuration Register
-
-
B6
B6
-
-
DATASHEET
B5
B5
-
-
52
PWM_
B4
-
OT
B4
RPM-Based Fan Controller with HW Thermal Shutdown
B3
-
B3
-
B2
-
B2
-
INT_EN
SPIN_
B1
B1
-
STALL_
INT_EN
POLA
RITY
B0
B0
SMSC EMC2103
DEFAULT
DEFAULT
Datasheet
00h
00h