Sorry, yes SPI. I understand the uC interface has nothing to do with range but I am hoping someone out there has used one of these devices and may be familiar with them.

As it relates to efficiency, I am thinking mostly about the uC overhead for handline the SPI or UART in PBP. I like all the built in routines for UART but do they cause a lot of overhead or on a small application is the overhead so minimal as to not matter?


Thanks
George