MLX90308 データシートの表示（PDF） - Melexis Microelectronic Systems

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MLX90308

Programmable Sensor Interface

Melexis Microelectronic Systems  

MLX90308

Programmable Sensor Interface

Table 11. EEPROM Byte Definitions (continued)

Byte

Designation

Note

24

PNB_TNB

25

n_factor

26

Not used

27

ALARM low trigger

Level1 IO2/IO1

28

ALARM low output

Level2 IO2/IO1

29

ALARM high trigger

Level3 IO2/IO1

30

ALARM high out level

31

ALARM control byte

IO1/IO2 control byte

Four LSB's are unused

32

ClkTC1

33

ClkTC2

34

ClkTC3

35

Ctemp1

36

Ctemp2

37-38 Not used

39

CLKgntp

40-41

42-46

Faultval

Not Used

47

Checksum

Number of temperature and pressure gaps. See Tables 4, 5,

and 6, and Figures 3 and 4.

Temperature filter coefficient, four LSB's. Four MSB's must

all be zero.

This byte is not used.

Value below which ALARM will go on.

Value of first level ([IO2, IO1]= 00-01). See Figures 5 & 7.

Value of DIGMO during “ALARM low” condition.

Value of second level ([IO2,IO1] = 01-10). See Figures 5 and

7

Value above which ALARM will go on.

Value of third level ([IO2,IO1]=10-11). See Figures 5 and 7.

Value of DIGMO during “ALARM high” condition. See

Figures 5 and 7.

Three bits needed for choice of input for ALARM detection

(TPO, IAO, GNO, VMO, IO1 or IO2).

Two bits needed for choice of input for LEVEL-steering

(TPO, IAO, GNO or VMO).

The above bits are multiplexed according to the mode. If both

CMO and VMO are active, then alarm is not active.

Value of Cadj at low temperature (Don’t change; factory set).

Value of Cadj at mid temperature (Don’t change; factory set).

Value of Cadj at high temperature Don’t change; factory set).

First Cadj temperature point, eight MSB’s of the 10 bit

internal temperature value (set at factory; do not change).

Second Cadj temperature point, eight MSB’s of the 10 bit

internal temperature value (set at factory; do not change).

These bytes are not used by the firmware and are available

to the user.

Setting for temperature amplifier for clock temperature

adjustment temperature reading (set at factory; do not

change).

Value sent to output if checksum test fails is a 10 bit value.

These bytes are not used by the firmware and are available

to the user.

EEPROM checksum; value needed to make all bytes add to

0FFh. Must be set by user if checksum test is active.

3901090308

Rev 007

Page 18

May/12

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