MLX90320LFRLFR MELEXIS [Melexis Microelectronic Systems], MLX90320LFRLFR Datasheet - Page 19

• Manufacturer Part Number: MLX90320LFRLFR
• Description: Automotive small sensor interface
• Manufacturer: MELEXIS [Melexis Microelectronic Systems]

The default mode is the receive mode. The user has to send a valid command to the interface chip.
6.5.3 Bit format
The bit is coded into a pulse width modulated format (PWM).
PWM format has no need for message frame synchronization. This has the advantage that the receive speed can
differ from the transmit speed. There is no configuration needed, the receiver can work with various bit rates.
A valid bit always starts with a falling edge. This means that after making a communication request by shorting to
ground, the user must reset the output line to high status.
Duty cycle:
Period: (Over total clock frequency range)
3901090320
Rev 004
2) First case : the analog level is quite high :
3) Second case : the analog level is quite low :
1) Pattern to enter the communication mode
1
0
COM pin :
COM pin :
COM pin :
IRQ :
IRQ :
analog signal
30 / 70% (min = 20 / 80%, max = 40 / 60%)
Has to stay HIGH
at max 2.0 ms
at min 1.0 ms
1.5ms +-
5 Volts
5 Volts
0 Volt
0 Volt
30%
Short-circuit to
VDD
Short-circuit to the GROUND
Has to stay LOW
A HIGH level should be
at max 2.0 ms
at min 1.0 ms
1.5ms +-
seen within 3 ms
30%
<1ms
be seen within 3 ms
A LOW level should
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Short-circuit to
1.5ms +-
30%
Has to stay
VDD
min 1.0ms
HIGH at
at max
2.0ms
Short-circuit to the GROUND
A HIGH level should be
detected within 3 ms
1.5ms +-
30%
Has to stay
min 1.0 ms
at max 2.0
LOW at
Automotive small sensor interface
ms
A HIGH level should be
detected within 3 ms
Digital Signal
< 90ms
Waiting for the first bit = 90 ms
Waiting for the first bit = 90 ms
MLX90320
Data Sheet
Mar/05