EMC1001_15 datasheet(11/24 Pages) MICROCHIP

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 2015 Microchip Technology Inc.

DS20005411A-page 11

EMC1001

4.4

ADDR/THERM Output

The ADDR/THERM output asserts if the temperature

measurement exceeds the programmable THERM

limit. It can be used to drive a fan or other failsafe

devices. The ADDR/THERM pin is open drain and

requires a pull-up resistor to VDD. The value of this

pull-up resistor determines the slave address per

Table 1-1. The ADDR/THERM pin cannot be masked.

When the ADDR/THERM pin is asserted, it will not

de-assert until the temperature drops below the

THERM limit, minus the THERM Hysteresis value.

FIGURE 4-4:

THERM Response to THERM Limit Exceeded.

4.5

Standby Mode

The EMC1001 can be set to Standby mode (low power)

by setting a bit in the Configuration Register as

described in Section 4.8 “Configuration Register”.

This shuts down all internal analog functions while the

SMBus remains enabled. When the EMC1001 is in

Standby mode, a One-Shot command measurement

can be initiated. The user may also write new values to

the limit registers described in Section 4.10 “Limit

Registers” while in Standby. If the previously stored

temperature is outside any of the new limits, the

ALERT/THERM2 output will respond as described in

Section 4.3 “ALERT/THERM2 Output”

and the

ADDR/THERM output will respond as described in

Section 4.4 “ADDR/THERM Output”.

Temp

Time

THERM Limit

THERM Limit - THERM Hysterisis

THERM

Hysteresis

Logic High

Logic

Level

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