MLX90314_12 Datasheet, PDF (18/28 Pages) Melexis Microelectronic Systems – Programmable Sensor Interface

MLX90314
Programmable Sensor Interface
Table 11. EEPROM Byte Definitions (continued)
Byte
Designation
Note
24
PNB_TNB
Number of temperature and pressure gaps. See Tables 4, 5,
and 6, and Figures 3 and 4.
25
n_factor
Temperature filter coefficient, four LSB's. Four MSB's must
all be zero.
26
Not used
This byte is not used.
27
ALARM low trigger
Level1 IO2/IO1
Value below which ALARM will go on.
Value of first level ([IO2, IO1]= 00-01). See Figures 5 & 7.
28
ALARM low output
Level2 IO2/IO1
Value of DIGMO during “ALARM low” condition.
Value of second level ([IO2,IO1] = 01-10). See Figures 5 and
7
29
ALARM high trigger
Level3 IO2/IO1
Value above which ALARM will go on.
Value of third level ([IO2,IO1]=10-11). See Figures 5 and 7.
30
ALARM high out level
Value of DIGMO during “ALARM high” condition. See
Figures 5 and 7.
31
ALARM control byte
Three bits needed for choice of input for ALARM detection
(TPO, IAO, GNO, VMO, IO1 or IO2).
IO1/IO2 control byte
Two bits needed for choice of input for LEVEL-steering
(TPO, IAO, GNO or VMO).
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
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.
3901090314
Rev 008
Page 18
Apr/12