MLX16305 Datasheet, PDF (22/29 Pages) Melexis Microelectronic Systems – Interlock switch sensor interface IC

MLX16305
Interlock switch sensor interface IC
14.3. Diagnostics flow
Example software flow for interlock switch diagnostics:
1) Set ENABLE low
a. Set MUX_SENSEx (select channel)
b. Set to Vmode: evaluate short to vbat
2) Set ENABLE high: supply selected channel : wait 250us to allow the output to settle.
a. In the mean time set Imode.
b. 250us after ENABLE has been set high -> Evaluate the measured current value
c. Set to Vmode and evaluate short to ground
d. Set one by one all other channels to evaluate shorts between the supplied pin and the
other channels
3) Return to 1)
For further discussions in this document it assumed that the flow for 1 pin could be completed in 0.5ms
including the 250us settling time.
3901016305
Rev. 005
Page 22 of 29
Data Sheet
Oct/06