EMC2104_11 Datasheet, PDF (20/99 Pages) SMSC Corporation – Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown

4.7
4.8
Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown
Datasheet
The EMC2104 will respond to the ARA in the following way if the ALERT# pin is asserted.
1. Send Slave Address and verify that full slave address was sent (i.e. the SMBus communication
from the device was not prematurely stopped due to a bus contention event).
2. Set the MASK bit to clear the ALERT# pin.
SMBus Address
The EMC2104 SMBus Address is fixed at 0101_111xb.
Attempting to communicate with the EMC2104 SMBus interface with an invalid slave address or invalid
protocol will result in no response from the device and will not affect its register contents.
SMBus Time-out
The EMC2104 includes an SMBus time-out feature. Following a 30ms period of inactivity on the
SMBus, the device will time-out and reset the SMBus interface. The SMBus Timeout defaults to
enabled and can be disabled by setting the DIS_TO bit in the Configuration 2 register.
Revision 1.78 (02-28-11)
20
DATASHEET
SMSC EMC2104