MLX90308CAB Datasheet, PDF (21/26 Pages) List of Unclassifed Manufacturers – Programmable Sensor Interface

MLX90308CAB
Programmable Sensor Interface
Table 13. RAM Byte Definitions (continued)
Byte Functions
Remarks
30 ALARM control byte
IO1/IO2 control byte
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.
31 ALARM low trigger level 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
Tempo3
Rx_char
P3_copy
Adsav1
Aaccsav
Baccsav
DAC_gain
DAC_offset
Temp_f
60-61 Pressure
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.
Temporary variable 3.
Received character on the serial port.
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 justi-
fied in a 16 bit field.
Pressure
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 15.
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