Environmental Monitoring and Control Device
Datasheet
INT_STS1 Reg
2.5V_Error (INT1[0])
2.5V_Error
Vccp_Error
3.3V_Error
2.5V_Error_En (INTE[2])
Vccp_Error_En (INTE[3])
Vccp_Error (INT1[1])
VCC_Error (INT1[2])
5V_Error (INT1[3])
VCC_Error_En (INTE[7])
5V_Error_En (INTE[5])
5V_Error
Zone 1 Limit
Zone 2 Limit
Zone 3 Limit
Zone 1 Limit (INT1[4])
Zone 2 Limit (INT1[5])
Zone 3 Limit (INT1[6])
Diode 1_En (SFTR[6])
Ambient_En (FTIE[6])
Diode 2_En (SFTR[7])
+
TEMP_EN
(FTIE[5])
INT_STS2 Reg
12V_Error (INT2[0])
12V_Error
Fan1 Stalled
Fan2 Stalled
12V_Error_En (INTE[6])
Fan1 Stalled_En (FTIE[1])
Fan1 Stalled (INT2[2])
INT#
Fan2 Stalled (INT2[3])
Fan3 Stalled (INT2[4])
Fan4 Stalled (INT2[5])
Diode 1 Fault (INT2[6])
Diode 2 Fault (INT2[7])
+
Fan2 Stalled_En (FTIE[2])
Fan3 Stalled_En (FTIE[3])
Fan4 Stalled_En (FTIE[4])
Diode 1_En (SFTR[6])
+
+
Fan3 Stalled
Fan4 Stalled
Diode 1 Fault
Diode 2 Fault
INT_EN
FAN_EN
(SFTR[2])
(FTIE[0])
Diode 2_En (SFTR[7])
INT_STS3 Reg
1.5V_Error (INT3[0])
1.8V_Error (INT3[1])
3.3V_Error (INT3[2])
1.5V_Error
1.8V_Error
3.3V_Error
1.5V_Error_En (INTE[0])
1.8V_Error_En (INTE[1])
VOLTAGE_EN
(SFTR[3])
3.3V_Error_En (INTE[4])
FIGURE 6.1 - INTERRUPT AND INTERRUPT STATUS REGISTER CONTROL
6.4.1 DIODE FAULT
The EMC6D100/EMC6D101 Chip automatically sets the associated diode fault bit to 1 when there is either
a short or open circuit fault on the Remote x+ or Remote x- thermal diode input pins. The occurrence of a
fault will cause 80h to be loaded into the associated reading register, which will cause the corresponding
zone error bit to be set. This will cause the INT# pin to become active if enabled.
It will also cause the auto fan algorithm to turn any fans associated with that zone on full when it sees a
reading of 80h.
If the diode is disabled, the fault bit in the interrupt status register will not be set. In this case, the
occurrence of a fault will cause 00h to be loaded into the associated reading register. The limits must be
programmed accordingly to prevent unwanted fan speed changes based on this temperature reading. If
the diode is disabled and a fault condition does not exist on the diode pins, then the associated reading
register will contain a “valid” reading.
6.5
Interrupt Pin
EMC6D100 only.
The INT# function is used as an interrupt output for out-of-limit temperature, voltage events, and/or fan
errors.
SMSC EMC6D100/EMC6D101
Page 24
Rev. 09-09-04
DATASHEET
SMSC [ SMSC CORPORATION ]
