EMC1428 datasheet(40/53 Pages) MICROCHIP

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1°C Multiple Temperature Sensor with HW Thermal Shutdown & Hottest of Thermal Zones

Data Sheet

DS20005275A-page 40

 2014 Microchip Technology Inc.

5.15

Beta Configuration Register

These registers are used to set the Beta Compensation factor that is used for the External Diode

channels.

Bit 3 - AUTOx - Enables the Beta Compensation factor autodetection function.



‘0’ - The Beta Compensation Factor autodetection circuitry is disabled. The External Diode will

always use the Beta Compensation factor set by the BETAx[2:0] bits.



‘1’ (default) - The Beta Compensation factor autodetection circuitry is enabled. At the beginning of

every conversion, the optimal Beta Compensation factor setting will be determined and applied.

The BETAx[2:0] bits will be automatically updated to indicate the current setting.

Bit 2-0 - BETAx[2:0] - These bits always reflect the current beta configuration settings. These bits will

be updated automatically and writing to these bits will have no effect.

4 (default for CTHRM[2:0])

All Others

1 (CALRT[2:0]),

4 (CTHRM[2:0])

Table 5.19 Beta Configuration Register

ADDR.

R/W

DEFAULT

25h

External Diode 1

Beta Configuration

----

AUTO1

BETA1[2:0]

08h

26h

R/W

External Diode 2

Beta Configuration

----

AUTO2

BETA2[2:0]

08h

71h

R/W

External Diode 4

Beta Configuration

----

AUTO4

BETA4[2:0]

08h

72h

R/W

External Diode 6

Beta Configuration

----

AUTO6

BETA6[2:0]

07h

Table 5.20 Beta Compensation Look Up Table

BETAX[2:0]

MINIMUM BETA

210

000

< 0.08

001

< 0.111

010

< 0.176

Table 5.18 Consecutive Alert Settings (continued)

NUMBER OF CONSECUTIVE OUT OF LIMIT

MEASUREMENTS

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