Of the few dozen 805x app's I've looked at recently, not one has communicated with anything else over the UART.

Now, that's only over the few that have been put in front of me, but, that's what I see from where I sit. The UART is normally tied up in the development hardware, so I can understand how that comes about.

You're probably right in your assertion that synchronous mode is not used much. That, I suppose, is a remnant of the days when it wasn't slow enough for the CPU to do much other than to stash the data in memory and then move the next byte. The CPU's are faster now, and, despite the fact that, even on the Maxim MCU, the mode-0 rate is a twelvth or a fourth that of the oscillator, or of the oscillator multiplied by two, or of the oscillator multiplied by four, it's still not ideal. It is fast enough for what I need to do TODAY, however, and since the CPU can store the data in just a couple or three clock ticks, I even have time to do some other chores.

RE