analog.com interface spi_master_rtl 1.0 SCLK required 1 required 1 in SDI required 1 in 1 SDI_1 required 1 in 1 SDI_2 required 1 in 1 SDI_3 required 1 in 1 SDI_4 required 1 in 1 SDI_5 required 1 in 1 SDI_6 required 1 in 1 SDI_7 required 1 in 1 SDO 1 1 in SDO_T 1 1 in THREE_WIRE 1 1 in CS in