EMC1072-A-ACZL-TR SMSC, EMC1072-A-ACZL-TR Datasheet - Page 14

• Manufacturer Part Number: EMC1072-A-ACZL-TR
• Description: Board Mount Temperature Sensors SMBus Temp Sensor Selectable Address
• Manufacturer: SMSC

Specifications of EMC1072-A-ACZL-TR

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

APPLICATION NOTE: The ARA does not clear the Status Register and if the MASK bit is cleared prior to the Status
Revision 1.39 (10-11-10)
4.7
4.8
The EMC1072 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
2. Set the MASK bit to clear the ALERT pin.
The EMC1072-A SMBus address is determined by the pull-up resistor on the THERM pin as shown
in
The Address decode is performed by pulling known currents from VDD through the external resistor
causing the pin voltage to drop based on the respective current / resistor relationship. This pin voltage
is compared against a threshold that determines the value of the pull-up resistor.
The EMC1072 responds to hard-wired SMBus slave address as shown in
The EMC1072 supports SMBus Timeout. If the clock line is held low for longer than 30ms, the device
will reset its SMBus protocol. This function can be enabled by setting the TIMEOUT bit in the
Consecutive Alert Register (see
SMBus Address
SMBus Timeout
Table
from the device was not prematurely stopped due to a bus contention event).
4.7.
Register being cleared, the ALERT pin will be reasserted.
PULL UP RESISTOR
ON THERM PIN
Table 4.7 SMBus Address Decode
4.7k
6.8k
10k
15k
22k
33k
Section
DATASHEET
6.11).
14
SMBUS ADDRESS
1011_100xb
1001_100xb
1101_100xb
0011_100xb
0111_100xb
1111_100xb
1°C Temperature Sensor with Selectable Address
Table 1.1, "Part
SMSC EMC1072
Selection".
Datasheet