EMC2103 datasheet(47/85 Pages) MICROCHIP

47 / 85 page

RPM-Based Fan Controller with Hardware Thermal Shutdown

Datasheet

 2013 Microchip Technology Inc.

DS0005250A-page 47

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

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

6.7

Beta Configuration Register

The Beta Configuration Register controls advanced temperature measurement features of the External

Diode channels.

If External Diode 1 is selected as the hardware shutdown measurement channel (see Section 5.1.1)

then the External Diode 1 Beta register will be read only. If the internal diode is selected, then this

EMC2103-4 only) then this register can be written normally. Finally, if External Diode 2 is selected as

the hardware shutdown measurement channel (EMC2103-2 and EMC2103-4 only), then the External

Diode 2 Beta Configuration Register will be read only.

14h

1.0106

15h

1.0119

16h

1.0133

17h

1.0146

Table 6.10 Substrate Diode Ideality Factor Look-Up Table (BJT Model)

SETTING

FACTOR

10h

0.9973

11h

0.9986

12h

1.0000

13h

1.0013

14h

1.0026

15h

1.0039

16h

1.0053

17h

1.0066

Table 6.11 Beta Configuration Register

ADDR

R/W

DEFAULT

14h

R/W -

see

Table 5.1

External Diode 1

Beta

Configuration

AUTO1

BETA1[2:0]

see

Table 5.1

15h **

R/W -

see

Table 5.1

External Diode 2

Beta

Configuration **

AUTO2

BETA2[2:0]

see

Table 5.1

Table 6.9 Ideality Factor Look-Up Table (continued)

SETTING

FACTOR

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