MLX16303 Datasheet, PDF (15/20 Pages) Melexis Microelectronic Systems – Bi-directional Remote Sensor Unit Interface

MLX16303
Bi-directional Remote Sensor Unit Interface
(all the bits are set to ‘1‘). The CMD_DIAG1 is only possible in normal mode.
If the CMD_DIAG1 is sent when the channel is off, the last status of the channel when it was on is replied.
The diagnosis bits cannot change in off state even if an error appears (except for the bit DB4, over
temperature bit, which represents the temperature status).
Command
MSB
LSB
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 0 0 0 0 0 0 0 0 0 0 0 CS CMD_DIAG
Bit
CMD_DIAG
CS
Function
Bit2
Bit1
Bit0
0
1
0
Select the channel
0: Channel 0 selected
1: Channel 1 selected
Answer
MSB
LSB
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 CMD_BYTE
Bit
CMD_BYTE
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
Function
Reflected lower byte
0: IOUTx OK
1: IOUTx to high
0: IOUTx OK
1: IOUTx to low
0: VOUTx OK
1: VOUTx to high
0: VRETx OK
1: VRETx to high
0: no fault
1: fault Over temperature
(both channels are turned off)
0: Channel is on
1: Channel switched off
0
0
CMD_DIAG2
Request of the actual diagnosis result of the bi-directional remote unit interface IC after an error has
occurred, the channel was switched off and the exact errortyp (checked with CMD_DIAG1) is still unclear.
3901016303
Rev. 004
Page 15 of 20
Data Sheet
Jun/04