MLX90308CCCUD datasheet(16/26 Pages) MICRO-ELECTRONICS

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MLX90308CCC

Programmable Sensor Interface

MLX90308CCC Programmable Sensor Interface

Page 16

Rev 2.2

23/Oct/01

Byte

Designation

Note

MODE byte

Contents described in Table 9.

Cadj

Controls system clock during boot.

Coarse Control

Contents described in Table 12.

GN1L

The eight LSB's of the Fixed Gain, GN[7:0].

OF1L

The eight LSB's of Fixed Offset OF[7:0].

GNTC1L

The eight LSB's of the first gain TC GNTC1[7:0].

OFTC1L

The eight LSB's of the first offset TC OFTC1[7:0].

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].

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].

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].

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].

Table 11. EEPROM Byte Definitions

Decimal

Hexadecimal

Equivalent

Fixed Point Signed

Number Equivalent

0000h

+0.00

1023

3FFh

+0.9990234

1024

400h

+1.000

2047

7FFh

+1.9990234

2048

800h

-0.000

3071

0BFFh

-0.9990234

3072

0C00h

-1.000

4095

0FFFh

-1.9990234

Table 10. Examples of Fixed Point

Signed Numbers

Data Range

Various data are arranged as follows:

Temperature points: 10 bits, 0-03FF in high-

low order.

Pressure points: 10 bits, 0-03FF in high-low

order.

GN1: 10 bits, 0-03FF in high-low order.

OF1: 10 bits, 0-03FF in high-low order.

GNTCi: signed 12 bits (with MSB for the sign),

[-1.9990234, +1.9990234].

OFTCi: signed 12 bits (with MSB for the sign),

[-1.9990234, +1.9990234].

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

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