SPI-4.2 Receive Data Bus (LVDS): The 16-bit data bus used to receive SPI-4.2 data and control information. RCtl_P RCtl_N Input RDClk SPI-4.2 Receive Control (LVDS): SPI-4.2 Interface signal that indicates whether data or control information is present on the RDat bus. When RCtl is deasserted, data is present on RDat.
The SPI bus (or Serial Peripheral Interface bus) is a synchronous serial data link originally created by motorola. For more information about SPI please refer to this link: http://en.wikipedia.org/wiki/Serial_Peripheral_Interface.
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Sep 25, 2019 · SPI displays and other devices connected via SPI should benefit as well with faster performance. The optimization principally comes down to clearing the RX FIFO and zero-filling the TX FIFO. More details on this work within the SPI pull request that also notes Freescale driver work improving performance and other enhancements.