EMC2300_11 Datasheet, PDF (24/82 Pages) SMSC Corporation – Fan Control Device with High Frequency PWM and Temperature Monitors

Fan Control Device with High Frequency PWM and Temperature Monitors
Datasheet
INT_STS1 Reg
Vccp_Error
Vccp_Error (INT1[1])
Vccp_Error_En (IER1[3])
+
VCC_Error
VCC_Error (INT1[2])
VCC_Error_En (IER1[7])
Diode 1 Limit
Diode 1_En (IER3[2])
Diode 1 Limit (INT1[4])
Ambient Limit
Ambient_En (IER3[1])
Ambient Limit (INT1[5])
+
Diode 2 Limit
Diode 2_En (IER3[3])
Diode 2 Limit (INT1[6])
INT2 (INT1[7])
+
INT#
INT_STS2 Reg
TACH1 Out-of-Limit
TACH1_En (IER2[1])
TACH1 (INT2[2])
TACH2 Out-of-Limit
TACH2 _En (IER2[2])
TACH2 (INT2[3])
TACH3 Out-of-Limit
TACH3 _En (IER2[3])
TACH4 Out-of-Limit
TACH4 _En (IER2[4])
+
TACH3 (INT2[4])
TACH4 (INT2[5])
Diode 1 Fault
Diode 1_En (IER3[2])
Diode 1 Fault (INT2[6])
Diode 2 Fault
Diode 2_En (IER3[3])
Diode 2 Fault (INT2[7])
6.4.1
Figure 6.1 Interrupt Control
Note: The diode fault bits are not mapped directly to the INT# pin. A diode fault condition forces the
diode reading register to a value of 80h, which will generate a Diode Error condition. See
section Diode Fault on page 24.
Diode Fault
The EMC2300 Chip automatically sets the associated diode fault bit to 1 when any of the following
conditions occur on the Remote Diode pins:
„ The positive and negative terminal are an open circuit.
„ Positive terminal is connected to VCC
„ Positive terminal is connected to ground
„ Negative terminal is connected to VCC
„ Negative terminal is connected to ground
Revision 0.32 (06-23-08)
24
DATASHEET
SMSC EMC2300