emc1413 Standard Microsystems Corp., emc1413 Datasheet - Page 15

• Manufacturer Part Number: emc1413
• Description: 1?c Temperature Sensor With Beta Compensation And Selectable Address
• Manufacturer: Standard Microsystems Corp.

1°C Temperature Sensor with Beta Compensation and Selectable Address
Datasheet
APPLICATION NOTE: The ARA does not clear the Status Register and if the MASK bit is cleared prior to the Status
APPLICATION NOTE: The pull-up resistor on the THERM pin must be connected to the same 3.3V supply that
SMSC EMC1413 / EMC1414
4.7
4.8
The EMC1413 and EMC1414 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 EMC1413-A and EMC1414-A SMBus slave 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 EMC1413 and EMC1414 -1 and -3 SMBus address is hard wired as given in
Selection".
The EMC1413 and EMC1414 support 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
from the device was not prematurely stopped due to a bus contention event).
Register being cleared, the ALERT pin will be reasserted.
drives the VDD pin. Additionally, for ~10ms after power up, the THERM pin must not be
pulled low SMBus slave address will not be decoded properly. If the system requirements do
not permit these conditions, then the THERM pin must be isolated from their respective
busses during this time.
PULL UP RESISTOR ON
THERM PIN
Table 4.7, "SMBus Address
Table 4.7 SMBus Address Decode
4.7k
6.8k
10k
15k
22k
33k
DATASHEET
Section 6.12, "Consecutive ALERT
15
SMBUS ADDRESS
1001_100xb
1011_100xb
1101_100xb
0011_100xb
0111_100xb
1111_100xb
Decode".
Register").
Revision 1.37 (12-23-09)
Table 1.1, "Part