EMC1183 Datasheet, PDF (17/48 Pages) SMSC Corporation – Triple Channel 1°C Temperature Sensor

Triple 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.
START
1 -> 0
Table 4.6 Alert Response Address Protocol
ALERT
RESPONSE
ADDRESS
0001_100
DEVICE
RD
ACK
ADDRESS
1
0
YYYY_YYY
NACK
1
STOP
0 -> 1
The EMC1183 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 EMC1183
17
DATASHEET
Revision 1.0 (07-11-13)