1°C Dual SMBus Sensor with Resistance Error Correction

Datasheet

SMSC EMC1002

17

Revision 1.3 (03-24-06)

DATASHEET

4.17

Consecutive ALERT Register

Bit 7 of the Consecutive ALERT register enables the SMBus timeout feature when set to 1 (the default

setting is 0). When enabled, the SMBus will timeout after approximately 25ms of inactivity. Table 4.9

describes how bits 3-1 of the Consecutive ALERT register set how many consecutive error conditions

These error conditions include diode faults and exceeding temperature limits. The default value is one

to be asserted. Any combination of bits 3-1 other than those shown will result in a value of one.

0.9925

XX00 0110

1.0133

XX01 0110

1.0349

XX10 0110

1.0574

XX11 0110

0.9938

XX00 0111

1.0146

XX01 0111

1.0363

XX10 0111

1.0589

XX11 0111

0.9951

XX00 1000

1.0159

XX01 1000

1.0377

XX10 1000

1.0603

XX11 1000

0.9964

XX00 1001

1.0173

XX01 1001

1.0391

XX10 1001

1.0618

XX11 1001

0.9976

XX00 1010

1.0186

XX01 1010

1.0404

XX10 1010

1.0632

XX11 1010

0.9989

XX00 1011

1.0199

XX01 1011

1.0418

XX10 1011

1.0647

XX11 1011

1.0002

XX00 1100

1.0213

XX01 1100

1.0432

XX10 1100

1.0661

XX11 1100

1.0015

XX00 1101

1.0226

XX01 1101

1.0446

XX10 1101

1.0676

XX11 1101

1.0028

XX00 1110

1.0240

XX01 1110

1.0460

XX10 1110

1.0690

XX11 1110

1.0041

XX00 1111

1.0253

XX01 1111

1.0475

XX10 1111

1.0705

XX11 1111

Table 4.8 Consecutive ALERT Register

BIT

NAME

FUNCTION

DEFAULT

7

SMBTE

0 = SMBus timeout disabled

1 = SMBus timeout enabled

0

6-4

Reserved

0

3-1

ALERTNUM

See Table 4.9

0

0

Reserved

0

Table 4.9 Consecutive ALERT Value

NUMBER OF EVENTS REQUIRED

VALUE

b3

b2

b1

1

000

2

001

3

011

4

111

Table 4.7 Diode Ideality Factor Values (continued)

DIODE

IDEALITY

FACTOR

VALUE

DIODE

IDEALITY

FACTOR

VALUE

DIODE

IDEALITY

FACTOR

VALUE

DIODE

IDEALITY

FACTOR

VALUE