mlx90314 Melexis Company, mlx90314 Datasheet - Page 21

• Manufacturer Part Number: mlx90314
• Description: Programmable Sensor Interface
• Manufacturer: Melexis Company

Table 13. RAM Byte Definitions (continued)
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.
MLX902xx Name of Sensor Rev Y.X 22/Aug/98
3901090314
Rev 007
Byte
35-36
37-38
39-42
43-44
46-47
51-52
54-55
56-57
58-59
60-61
62-63
30
31
32
33
34
45
48
49
50
53
Coms_backup
Functions
ALARM control byte
IO1/IO2 control byte
ALARM low trigger level
IO1/IO2 level 1
ALARM low output level
IO1/IO2 level 2
ALARM high trigger
level
IO1/IO2 level 3
ALARM high output
level
A_16
B_16
RESULT_32
Tempo1
Tempo2
Signal_In
P3_copy
Adsav1
Aaccsav
Baccsav
DAC_gain
DAC_offset
Temp_f
Signal_Out
Adsav2
Address saved when command is send.
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.
Value of first level ([IO2,IO1]=00-01).
Value of DIGMO during “ALARM low” condition.
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
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.
Page 21
Page 21
Programmable Sensor Interface
MLX90314
Nov04