The DSPI, which stands for Deserialization Serialization Peripheral Interface, is a high-speed, full duplex, three wire synchronous interface with many features. There are six peripheral chip selects which are expandable to a 64 width external demultiplexer that includes de-glitching support of up to 32 chip selects when the external multiplexer is used. The DSPI, with the eDMA, has an unlimited message buffer queue which means that the user is able fill up the SRAM. Master and slave modes are also supported. Three DSPI configurations that enable GPIO expansion are available including Serial Peripheral Interface (SPI), Deserial Serial Interface (DSI), or Combined Serial Interface (CSI).