MLX16303 Datasheet, PDF (16/20 Pages) Melexis Microelectronic Systems – Bi-directional Remote Sensor Unit Interface

MLX16303
Bi-directional Remote Sensor Unit Interface
If the CMD is sent during the programming mode, the answer will be the same as for a wrong command
(all the bits will be set to ‘1‘). The CMD_DIAG2 is only possible in normal mode.
If the CMD_DIAG2 is sent when the channel is on, , it is not a wrong command but the bit DB2
(CMD_DIAG2 valid or not) is set to’1’ and all the diagnosis bits are set to ‘0‘ (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
1
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: VOUTx OK
1: VOUTx < VOFFLOW
0: VOUTx OK
1: VOUTx > VOFFHIGH
0: DIAGNOSIS 2 valid (channel OFF)
1: DIAGNOSIS 2 invalid (channel ON)
0
0: no fault
1: fault Over temperature
(both channels are turned off)
0
0
0
CMD_NOP
No Operation allows ECU to poll the answer of a previous command.
3901016303
Rev. 004
Page 16 of 20
Data Sheet
Jun/04