Serial versus SPI

Question

What is the difference between SPI and serial? In reading an article talking about inter-processor communications, it states that serial interfaces are being replaced with SPI f

Answer 1

The previous answer is somewhat misleading.

SPI and UART both transfer binary data as bytes and/or words, depending on the hardware. As explained above, one is synchronous and one is asynchronous. Both require an extra data line to be bidirectional. ASCII is an agreed upon interpretation of the binary data and is not actually a factor in either.