Traditional electronic design methods are encountering a new problem when using newer electronic devices that provide a clock based data input or output (for example a MMC or SD memory card via a SPI communication bus). As semiconductor devices have become faster and faster in recent years they have become much more susceptible to issues caused by signal noise. This problem relates to any type of clocked interface where a device you will transfer data to or from automatically moves on to the next data bit, byte or word every time it see’s a new clock edge.
