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SS8017

Rev.2.01 6/06/2003

Table 5. Configuration-Byte Bit Assignments

BIT

NAME

POR STATE

FUNCTION

7 (MSB)

MASK

0

Masks all

ALERT interrupts when high.

6

RUN / STOP

0

Standby mode control bit. If high, the device immediately stops converting and enters

standby mode. If low, the device converts in either one-shot or timer mode.

5

DET_FAN

0

Should be 0. Changing this to 1 will cause

ALERT function abnormal.

4

EN_TH_SHUT

1

Validation of the fault queue function of thermal shutdown.

3-0

FQ_TH_SHUT

0010b

Fault Queue. Number of faults necessary to detect before setting TH_SHUT output to

avoid false tripping due to noise.

Table 6. Number of Faults assigned by FQ_TH_SHUT

FQ_TH_SHUT

Number of Faults

FQ_TH_SHUT

Number of Faults

0000b

1

1000b

9

0001b

2

1001b

10

0010b

3(Power-up default)

1010b

11

0011b

4

1011b

12

0100b

5

1100b

13

0101b

6

1101b

14

0110b

7

1110b

15

0111b

8

1111b

16

Table 7. Status-Byte Bit Assignments

BIT

NAME

FUNCTION

7(MSB)

BUSY

A high indicates that the ADC is busy converting.

6

RHIGH2*

A high indicates that the 2

5

RLOW2*

A high indicates that the 2

4

RHIGH1*

A high indicates that the 1

3

RLOW1*

A high indicates that the 1

2

OPEN*

A high indicates a remote-diode continuity (open-circuit) fault.

1

RFU

Reserved for future use (returns 0)

0(LSB)

RFU

Reserved for future use (returns 0)

*These flags stay high until cleared by POR, or until the status byte register is read.

Table 8. Conversion-Rate Control Byte

DATA

CONVERSION

RATE (Hz)

Temperature Sensor Average

Supply Current (µA TYP, at Vcc = 5V)

00h

0.0625

30

01h

0.125

33

02h

0.25

35

03h

0.5

48

04h

1

70

05h

2

128

06h

4

225

07h

8

425

08h to FFh

RFU

-