We're looking at converting a PCB from 6805 to 68H08. Freescale (Motorola?) have a document that says the H08 is enhanced "fully object code compatible" version of the 6805. I suspect this just means that the opcodes for e.g. BRA somewhere, are the same in H08. I know most H08 instructions execute faster than 6805..
I will read the manuals in detail to compare but I'm wondering if anyone is aware of any differences in the operation of SPI, SCI, Timers etc where 6805 code will behave differently on the H08 or any problems that might occur migrating from 6805 to H08.
Thanks.