MC33190
Posted: Sun May 22, 2005 7:06 pm
Does anyone have schematics based on MC33199 instead of optos and transistors? This may be a very simple circuit, but I can't find any app schematics to verify anything. I'm making a micro interface, and don't need RS232 at all, so I'd rather try out the 33199, or it's 33290 replacement(without the L line). Is there any reason why the interface has to be optoisolated? If a microcontroller is using the same power supply as the ECU, why would isolation matter at all?
Will this setup (or any standard 232-ISO9141 interface) work for SSM use?
I'm very new to OBD2, please excuse my ignorance.
Will this setup (or any standard 232-ISO9141 interface) work for SSM use?
I'm very new to OBD2, please excuse my ignorance.