1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

Datasheet

SMSC EMC1053

21

Revision 1.37 (02-05-07)

DATASHEET

4.8

Beta Configuration Registers (29h - 2Ah)

By default, the beta compensation circuitry is disabled and the EMC1053 is configured to measure

discrete diode-connected transistors. Writing to the Beta Configuration Registers will enable the beta

compensation circuitry and should be used if measuring a CPU substrate diode.

The beta compensation circuit is able to compensate for beta variation within a given range. The beta

configuration register is configured to the proper range to match the CPU to be monitored. The beta

values should be set so that the minimum expected beta is not below the threshold indicated in

Table 4.10. Beta compensation is activated if the BETA<2:0> bits are set to any value other than 07h.

Table 4.8 Ideality Factor Look Up Table

SETTING

FACTOR

SETTING

FACTOR

SETTING

FACTOR

001000

0.9951

011000

1.0159

101000

1.0377

001001

0.9964

011001

1.0173

101001

1.0391

001010

0.9976

011010

1.0186

101010

1.0404

001011

0.9989

011011

1.0199

101011

1.0418

001100

1.0002

011100

1.0213

101100

1.0432

001101

1.0015

011101

1.0226

101101

1.0446

001110

1.0028

011110

1.0240

101110

1.0460

001111

1.0041

011111

1.0253

101111

1.0475

010000

1.0054

100000

1.0267

110000

1.0489

010001

1.0067

100001

1.0280

110001

1.0503

010010

1.0080

100010

1.0294

010011

1.0093

100011

1.0308

010100

1.0106

100100

1.0321

010101

1.0119

100101

1.0335

010110

1.0133

100110

1.0349

010111

1.0146

100111

1.0363

Table 4.9 Beta Configuration Registers

ADDR

REGISTER

B7

B6

B5

B4

B3

B2

B1

B0

DEFAULT

29h

Diode 1 Beta

Configuration

-

-

-

-

-

BETA<2:0>

07h

2Ah

Diode 2 Beta

Configuration

-

-

-

-

-

BETA<2:0>

07h