EMC2300_11 Datasheet, PDF (19/82 Pages) SMSC Corporation – Fan Control Device with High Frequency PWM and Temperature Monitors

Fan Control Device with High Frequency PWM and Temperature Monitors
Datasheet
Note:
The INT# signal is an alternate function on the PWM2 and TACH3 pins. The EMC2300 device
will respond to the SMBus Alert Response address even if the INT# signal is not selected as
the alternate function on one of these pins as long as the following conditions exist: the INTEN
bit (register 7Ch bit 2) is set, an individual status bit is set in one of the interrupt status
registers, and the corresponding group enable bit is set. Each interrupt event must be enabled
into the interrupt status registers, and the status bits must be enabled onto the INT# signal via
the group enable bits for each type of event (i.e., temperature, voltage and fan). See the
section titled Interrupt Status Registers on page 23.
SMSC EMC2300
19
DATASHEET
Revision 0.32 (06-23-08)