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9

7-Channel Precision Remote-Diode, Thermistor,

and Local Temperature Monitor

SMBCLK

A = START CONDITION

B = MSB OF ADDRESS CLOCKED INTO SLAVE

C = LSB OF ADDRESS CLOCKED INTO SLAVE

D = R/W BIT CLOCKED INTO SLAVE

AB

C

D

E

FG

HI

J

SMBDATA

LM

K

E = SLAVE PULLS SMBDATA LINE LOW

F = ACKNOWLEDGE BIT CLOCKED INTO MASTER

G = MSB OF DATA CLOCKED INTO SLAVE

H = LSB OF DATA CLOCKED INTO SLAVE

I = MASTER PULLS DATA LINE LOW

J = ACKNOWLEDGE CLOCKED INTO SLAVE

K = ACKNOWLEDGE CLOCK PULSE

L = STOP CONDITION

M = NEW START CONDITION

Figure 3. SMBus Write Timing Diagram

SMBCLK

AB

C

D

E

FG

H

I

J

K

SMBDATA

A = START CONDITION

B = MSB OF ADDRESS CLOCKED INTO SLAVE

C = LSB OF ADDRESS CLOCKED INTO SLAVE

D = R/W BIT CLOCKED INTO SLAVE

E = SLAVE PULLS SMBDATA LINE LOW

L

M

F = ACKNOWLEDGE BIT CLOCKED INTO MASTER

G = MSB OF DATA CLOCKED INTO MASTER

H = LSB OF DATA CLOCKED INTO MASTER

I = MASTER PULLS DATA LINE LOW

J = ACKNOWLEDGE CLOCKED INTO SLAVE

K = ACKNOWLEDGE CLOCK PULSE

L = STOP CONDITION

M = NEW START CONDITION

Figure 4. SMBus Read Timing Diagram

TEMP (°C)

DIGITAL OUTPUT

>127

0111 1111

127

0111 1111

126

0111 1110

25

00011001

0.00

0000 0000

<0.00

0000 0000

Diode fault (open)

1111 1111

Diode fault (short)

1111 1111 or 1110 1110

Table 2. Main Temperature Register (High

Byte) Data Format

TEMP (°C)

DIGITAL OUTPUT

0

000X XXXX

+0.125

001X XXXX

+0.250

010X XXXX

+0.375

011X XXXX

+0.500

100X XXXX

+0.625

101X XXXX

+0.725

110X XXXX

+0.875

111X XXXX

Table 3. Extended Resolution

Temperature Register (Low Byte) Data

Format