Does anyone know what the protocol is for the built-in boot-loader serial programming protocol? I found an application note for the R8c/Mx series called "Standard Serial I/O Mode Serial Protocol Specification". I'm looking for something similar for the R32C that has all of the commands, basically what the FDT program does under the hood. Any information would be helpful.
Basically all R8C/M16C/M32C/R32C share the same protocol.
Please see this document prepared by DJ Delorie: