MLX90314
Programmable Sensor Interface
Data Range
Various data are arranged as follows:
Table 10. Examples of Fixed Point
Signed Numbers
Temperature points: 10 bits, 0-03FF in high-
low order.
Decimal
Value
Hexadecimal
Equivalent
Fixed Point Signed
Number Equivalent
Pressure points: 10 bits, 0-03FF in high-low
order.
0ꢀ
0000hꢀ
3FFhꢀ
400hꢀ
+0.00ꢀ
1023ꢀ
1024ꢀ
2047ꢀ
2048ꢀ
3071ꢀ
3072ꢀ
4095ꢀ
+0.9990234ꢀ
+1.000ꢀ
GN1: 10 bits, 0-03FF in high-low order.
OF1: 10 bits, 0-03FF in high-low order.
7FFhꢀ
800hꢀ
+1.9990234ꢀ
ꢁ0.000ꢀ
GNTCi: signed 12 bits (with MSB for the sign),
[-1.9990234, +1.9990234].
0BFFhꢀ
0C00hꢀ
0FFFhꢀ
ꢁ0.9990234ꢀ
ꢁ1.000ꢀ
OFTCi: signed 12 bits (with MSB for the sign),
[-1.9990234, +1.9990234].
ꢁ1.9990234ꢀ
Pci: signed 12 bits (with MSB for the sign),
[-1.9990234, +1.9990234]
DIGMO: 10 bits, 0-03FF in high-low order
(See Table 13 for examples of fixed point
signed numbers.)
Table 11. EEPROM Byte Definitions
Byte
Designation
Note
MODE byte
Contents described in Table 9.
0ꢀ
1
2
3
4
5
6
7
Cadj
Controls system clock during boot.
Coarse Control
GN1L
Contents described in Table 12.
The eight LSB's of the Fixed Gain, GN[7:0].
The eight LSB's of Fixed Offset OF[7:0].
The eight LSB's of the first gain TC GNTC1[7:0].
The eight LSB's of the first offset TC OFTC1[7:0].
OF1L
GNTC1L
OFTC1L
TR1L
PC5L
The eight LSB's of the first temperature point, T1[7:0].
The eight LSB's of Pressure Coefficient 5 PC5[7:0].
8
GNTC2L
P5L
The eight LSB's of the second gain TC GNTC2[7:0].
The eight LSB's of Pressure Point 5 P5[7:0].
9
OFTC2L
PC4L
The eight LSB's of the second offset TC OFTC2[7:0].
The eight LSB's of Pressure Coefficient 4 PC4[7:0].
10
11
TR2L
P4L
The eight LSB's of the second temperature point T2[7:0].
The eight LSB's of Pressure Point 4 (or Signature) P4[7:0].
GNTC3L
PC3L
The eight LSB's of the third gain TC GNTC3[7:0].
The eight LSB's of Pressure Coefficient 3 (or Signature) PC3
[8:0].
3901090314
Page 16
Nov/04
Rev 007
MELEXIS [ Melexis Microelectronic Systems ]
