MLX16303 Datasheet, PDF (14/20 Pages) Melexis Microelectronic Systems – Bi-directional Remote Sensor Unit Interface

MLX16303
Bi-directional Remote Sensor Unit Interface
Bit
CMD_BYTE
SC0
SC1
Function
Reflected lower byte of the command
Status of channel 0
0: channel 0 deactivated
1: channel 0 activated
Status of channel 1
0: channel 1 deactivated
1: channel 1 activated
CMD_PROG
Enables the communication to send data to the remote units (programming mode).
All other commands are not influenced by the status of the PM bit.
Command
MSB
LSB
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 0 0 1 1 0 0 0 0 1 0 0 PM CMD_PROG
Bit
CMD_PROG
PM
Function
101 binary
0: programming mode OFF
1: programming mode ON
Answer
MSB
LSB
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 0 0 1 1 0 0 PM CMD_BYTE
Bit
CMD_BYTE
PM
Function
Reflected lower byte of the command
Status about the actual programming mode status
The sent back bit PM can be set to ‘1‘ only if the supply for the programming mode (VP) is higher than
Vvp (9.2 Volts).
CMD_DIAG1
Request of the actual diagnosis result of the bi-directional remote unit interface IC. This means a copy of
the actual status after an error, generated by the continuous diagnosis in the bi-directional remote unit
interface IC, is answered back to the microcontroller. If an error is detected, the diagnosis affected bit is
memorized until the connected microcontroller has sent a CMD_ONOFF with the channel selected and
activated.
If the CMD is sent during the programming mode, the answer will be the same as for a wrong command
3901016303
Rev. 004
Page 14 of 20
Data Sheet
Jun/04