EVB90620 Datasheet, PDF (22/39 Pages) Melexis Microelectronic Systems – High precision non-contact temperature measurements

MLX90620
16x4 IR array
8.2.2 Internal registers
8.2.2.1 Configuration register (0x92)
The configuration register defines the chip operating modes.
It can be read and written by the I²C MD.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Configuration register bit meaning (0x92)
0 0 0 0 - IR Refresh rate = 512Hz
0 0 0 1 - IR Refresh rate = 512Hz
0 0 1 0 - IR Refresh rate = 512Hz
0 0 1 1 - IR Refresh rate = 512Hz
0 1 0 0 - IR Refresh rate = 512Hz
0 1 0 1 - IR Refresh rate = 512Hz
0 1 1 0 - IR Refresh rate = 256Hz
0 1 1 1 - IR Refresh rate = 128Hz
1 0 0 0 - IR Refresh rate = 64Hz
1 0 0 1 - IR Refresh rate = 32Hz
1 0 1 0 - IR Refresh rate = 16Hz
1 0 1 1 - IR Refresh rate = 8Hz
1 1 0 0 - IR Refresh rate = 4Hz
1 1 0 1 - IR Refresh rate = 2Hz
1 1 1 0 - IR Refresh rate = 1Hz (default)
1 1 1 1 - IR Refresh rate = 0.5Hz
x x NA
0 - Continuous measurement mode (default)
1 - Melexis reserved
0 - Normal operation mode (default)
1 - Sleep mode
0 - No Ta measurement running (flag only can not be written)
1 - Ta measurement running (flag only can not be written)
0 - No IR measurement running (flag only can not be written)
1 - IR measurement running (flag only can not be written)
0 - POR or Brown-out occurred - Need to reload Configuration register
1 - MD must write "1" during uploading Confuguration register (default)
0 - I²C FM+ mode eneabled (max bit transfer rates up to 1000 kbit/s) (default)
1 - I²C FM+ mode disabled (max bit transfer rates up to 400 kbit/s)
0 0 - Ta Refresh rate = 16Hz
0 1 - Ta Refresh rate = 8Hz
1 0 - Ta Refresh rate = 4Hz
1 1 - Ta Refresh rate = 2Hz (default)
0 - ADC high reference enabled
1 - ADC low reference enabled (default)
x NA
Table 10: Configuration register bit meaning
8.2.2.2 Trimming register (0x93)
It can be read and written by the I²C MD.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Trimming register bit meaning (0x93)
x x x x x x x x x NA
7 bit value
- Oscillator trim value
Table 11: Oscillator trimming bit meaning
3001090620
Rev 4.0
Page 22 of 40
Datasheet IR16x4
19 September 2012