SPI0-to-SPI1 Loopback Connection

Zynq UltraScale+ Device Technical Reference Manual (UG1085)

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2.4 English

The I/O signals of the two SPI controller in the PS are connected together when the iou_slcr.MIO_LOOPBACK [SPI0_LOOP_SPI1] bit is set = 1. In this mode, the clock, slave select, MISO, and MOSI signals from one controller are connected to the other controller’s clock, slave, MISO, and MOSI signals, respectively.