MLX90308LDF データシートの表示（PDF） - Melexis Microelectronic Systems

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MLX90308LDF

Programmable Sensor Interface

Melexis Microelectronic Systems  

MLX90308CCC

Programmable Sensor Interface

Table 13. RAM Byte Definitions (continued)

Byte

30

31

Functions

ALARM control byte

IO1/IO2 control byte

ALARM low trigger level

Remarks

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). These bits are multiplexed according the mode. Note:

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

Value below which ALARM will go on.

IO1/IO2 level 1

Value of first level ([IO2,IO1]=00-01).

32 ALARM low output level Value of DIGMO during “ALARM low” condition.

IO1/IO2 level 2

33 ALARM high trigger

level

34

35-36

37-38

39-42

43-44

IO1/IO2 level 3

ALARM high output

level

A_16

B_16

RESULT_32

Tempo1

45

46-47

48

49

50

51-52

53

54-55

56-57

58-59

Tempo2

Signal_In

Coms_backup

P3_copy

Adsav1

Aaccsav

Baccsav

DAC_gain

DAC_offset

Temp_f

60-61 Signal_Out

62-63 Adsav2

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

Value above which ALARM will go on.

Value of third level ([IO2,IO1] = 10-11).

Value of DIGMO during “ALARM high” condition.

16 bits A Register.

16 bits B Register.

32 bits result (for 16 bit multiplication).

Measured temperature, internal or external, and temporary

variable 1.

Temporary variable 2.

Digitized signal value, analog and digital mode

Address saved when command is send.

Port 3 setting copy.

Address saved at interrupt.

A-Accumulators saved at interrupt.

B-Accumulators saved at interrupt.

DAC gain (GN).

DAC offset (OF).

Filtered temperature. This is a 10 bit number that is left

justified in a 16 bit field.

Digitized linearity corrected signal value. Digital mode only.

Address saved when call.

Note: Because of space considerations, the measured temperature can’t be kept in the RAM at all times. If the

measured temperature is to be available, the temperature filter variable, N_Factor, must be set to 6.

M39L0X190029x0x3N08ame of Sensor Rev Y.X 22/Aug/98

Rev 004

Page P21age 21

Aug/02

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