EMC1186 datasheet(32/43 Pages) MICROCHIP

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Dual Channel 1°C Temperature Sensor with Hardware Thermal Shutdown and 1.8V SMBus Communications

Datasheet

Revision 1.0 (07-11-13)

SMSC EMC1186

DATASHEET

6.9

Hardware Thermal Shutdown Limit Register 1Eh

This read only register returns the Hardware Thermal Shutdown Limit selected by the value of the pull-

up resistors on the ALERT and SYS_SHDN pins. The data represents the hardware set temperature

in °C using the active temperature setting set by the RANGE bit in the Configuration Register. See

Table 5.3, "Temperature Data Format" for the data format.

When the External Diode 1 Temperature exceeds this limit, the SYS_SHDN pin is asserted and will

remain asserted until the External Diode 1 Temperature drops below this limit minus 10°C.

6.10

Channel Mask Register 1Fh

The Channel Mask Register controls individual channel masking. When a channel is masked, the

ALERT pin will not be asserted when the masked channel reads a diode fault or out of limit error. The

channel mask does not mask the SYS_SHDN pin.

Bit 1 - EXTMASK - Masks the ALERT pin from asserting when the External Diode channel is out of

limit or reports a diode fault.



‘0’ (default) - The External Diode channel will cause the ALERT pin to be asserted if it is out of

limit or reports a diode fault.



‘1’ - The External Diode channel will not cause the ALERT pin to be asserted if it is out of limit or

reports a diode fault.

Bit 0 - INTMASK - Masks the ALERT pin from asserting when the Internal Diode temperature is out

of limit.



‘0’ (default) - The Internal Diode channel will cause the ALERT pin to be asserted if it is out of limit.



‘1’ - The Internal Diode channel will not cause the ALERT pin to be asserted if it is out of limit.

Table 6.10 Hardware Thermal Shutdown Limit Register

ADDR.

R/W

B7B6B5B4B3B2B1B0

DEFAULT

1Eh

Hardware

Thermal

Shutdown Limit

128

N/A

Table 6.11 Channel Mask Register

ADDR.

R/W

DEFAULT

1Fh

R/W

Channel

Mask

---

EXT

MASK

INT

MASK

00h

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