EMC1187 datasheet(40/47 Pages) MICROCHIP

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

Datasheet

Revision 1.0 (07-11-13)

SMSC EMC1187

DATASHEET

APPLICATION NOTE: When measuring a 65nm Intel CPU, the Ideality Setting should be the default 12h. When

measuring a 45nm Intel CPU, the Ideality Setting should be 15h.

6.16

High Limit Status Register 35h

The High Limit Status Register contains the status bits that are set when a temperature channel high

limit is exceeded. If any of these bits are set, the HIGH status bit in the Status Register is set. Reading

from the High Limit Status Register will clear all bits if. Reading from the register will also clear the

HIGH status bit in the Status Register.

The ALERT pin will be set if the programmed number of consecutive alert counts have been met and

any of these status bits are set.

The status bits will remain set until read unless the ALERT pin is configured as a comparator output

(see Section 5.5.2).

Bit 2 - E2HIGH - This bit is set when the External Diode 2 channel exceeds its programmed high limit.

Bit 1 - E1HIGH - This bit is set when the External Diode 1 channel exceeds its programmed high limit.

Bit 0 - IHIGH - This bit is set when the Internal Diode channel exceeds its programmed high limit.

6.17

Low Limit Status Register 36h

The Low Limit Status Register contains the status bits that are set when a temperature channel drops

below the low limit. If any of these bits are set, then the LOW status bit in the Status Register is set.

Reading from the Low Limit Status Register will clear all bits. Reading from the register will also clear

the LOW status bit in the Status Register.

14h

1.0026

24h

1.0239

34h

1.0447

15h

1.0039

25h

1.0252

35h

1.0460

16h

1.0053

26h

1.0265

36h

1.0473

17h

1.0066

27h

1.0278

37h

1.0486

Table 6.21 High Limit Status Register

ADDR.

R/W

DEFAULT

35h

R-C

High Limit

Status

E2HIGH

EHIGH

IHIGH

00h

Table 6.22 Low Limit Status Register

ADDR.

R/W

DEFAULT

36h

R-C

Low Limit

Status

E2LOW

ELOW

ILOW

00h

Table 6.20 Substrate Diode Ideality Factor Look-Up Table (BJT Model) (continued)

SETTING

FACTOR

SETTING

FACTOR

SETTING

FACTOR

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