Hello,
A colleague of mine has designed a system that hosts a ADC device connected to a SPI bus, but only via the MISO (the MOSI pin of that particular bus is used for another purpose and cannot have its role changed to MOSI on the fly just to address the device). To the best of my knowledge, it is not possible to address any SPI device using a MISO only (it is possible, of course, by using only the MOSI) as no clock pulses are generated by reading from the SPI FIFO. Any thoughts...?