Dual Channel 1°C Temperature Sensor with Beta Compensation and 1.8V SMBus Communications
Datasheet
4.3
Alert Response Address
The ALERT output can be used as a processor interrupt or as an SMBus Alert.
When it detects that the ALERT pin is asserted, the host will send the Alert Response Address (ARA)
to the general address of 0001_100xb. All devices with active interrupts will respond with their client
address as shown in Table 4.6.
Table 4.6 Alert Response Address Protocol
ALERT
RESPONSE
ADDRESS
DEVICE
ADDRESS
START
1 -> 0
RD
ACK
NACK
STOP
0001_100
1
0
YYYY_YYY
1
0 -> 1
The EMC1182 will respond to the ARA in the following way:
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_ALL bit to clear the ALERT pin.
APPLICATION NOTE: The ARA does not clear the Status Register and if the MASK_ALL bit is cleared prior to the
Status Register being cleared, the ALERT pin will be reasserted.
SMSC EMC1182
17
Revision 1.0 (07-11-13)
DATASHEET
SMSC [ SMSC CORPORATION ]
