> > The SPI clock line is generated by the master, and I am wondering > > how to slow it down from the PIC side if the I2C transfer is taking > > too long > >You can't at the low level SPI layer. This would have to be handled by >higher level protocol or additional lines. Yes, I know that SPI does not allow for this unlike other protocols like e.g. I2C, and that I will have to do one of the two things you mention, either in-band singaling in the higher level protocol or using additional lines. I was hoping that someone has done something similar in the past? Thanks, G. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.