MLX90308CAB Datasheet, PDF (13/26 Pages) List of Unclassifed Manufacturers – Programmable Sensor Interface

MLX90308CAB
Programmable Sensor Interface
Alarm Option
This option allows controlling the low and high limits
of the output (See Figure 5.). The output level is set
when the output tries to exceed the programmed
limits. Five bytes are reserved for this option. The
first byte is the low trigger limit and the second the
low output. The third and fourth bytes are used for
the high limit and the output. The fifth byte is the
alarm control, used to select the alarm input. The
different levels are programmed as eight bit
numbers. These correspond to the 8 upper bits of
the 10 bit signal measurement. When the alarm
mode is not used, all of the data is 0. The control
code is coded as shown in Table 7. The six possible
signals are listed below and are encoded on the 4
MSB’s of byte 31 of the EEPROM.
Table 7. Alarm Source Bit Definition
Selected input
MUX Value
TPO
IAO
GNO
VMO
IO1
IO2
0010
0110
0000
0011
0100
0101
Figure 5.
Alarm Function
IO1 & IO2
IO1 and IO2 are used in the alarm and level steering
modes. For custom firmware, they can be used for a
digital input, an analog input, or a digital output.
Figure 6.
Alarm & Steering
Source Points
VBP
VBN
OFC
FLT
IAO
Offset
VDD1 FET VDD GND
Power Supply
Regulation
GNO
Gain
VM
VMO
TPO
TMP
Temp
Sense
& Amp
IO1
IO2
Bidirectional
I/O
ADC
&
DAC
UART
COMS
CM
CMO
CMN
Microcontroller
Core, Memory,
EEPROM
Reset,Test,&
Oscillator
TSTB
OUTPUT
High
Output
MLX90308
Figure 7. Level Steering
Function
IO1, IO2
MLX90308
1 -1
1-0
Low
Output
Low
Trigger
Input Signal
High
Trigger
0-1
0-0
(I02,I01)
Level 1
Level 2
Level 3
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