The USCI is also configurable as an SPI port. It is also compatible with the previous generation and has a migration guide for older 2xx devices. The enhancements to the SPI mode include operation of up to 10 Mb/s maximum bit rate with a goal of reaching up to 10 MHz in the near future. There is also a modified 4 pin mode that can be used as a true chip select in master mode for easier bus communication in system.