MLX16303 Datasheet, PDF (18/20 Pages) Melexis Microelectronic Systems – Bi-directional Remote Sensor Unit Interface

MLX16303
Bi-directional Remote Sensor Unit Interface
6. Unique Features
The MLX16303 provides a voltage/current communication interface for remote units. The required
diagnostics (short circuit, open circuit, temperature) are implemented on-chip, which drastically reduces
the need for applying external, discrete components for obtaining this functionality.
Error detection and handling :
The MLX16303 has a full set of problem detection:
- Short circuit between OUT and GND
- Short circuit between OUT and BAT
- Short circuit between RET and GND
- Short circuit between RET and BAT
- Short circuit between OUT and RET
- Open circuit between OUT and RET
- Over temperature
If an error is detected the relevant channel will be switched off. After an error occurred it will be latched.
The latched errors can only be reset by sending a CMD_ONOFF to the MLX16303.
The ECU can read out the detected errors using the SPI interface. The error detection in MLX16303
reacts before any damaging or unreliable operation can occur.
Handling of an invalid SPI command
In the corresponding answer word all bits will be set to ‘1’.
Answer to an invalid SPI command:
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1111111111111111
3901016303
Rev. 004
Page 18 of 20
Data Sheet
Jun/04