I am reading some reference code for MAXII CPLD. It is below. I do not understand what it is doing. Any one can help?
d_bit_13(.datain ( sck), //serial_clk_out
.oe (DC2026_DETECT), //DC2026_DETECT=1 SCK_33=sck & gated_sck, DC_2026_DETECT=0 SCK_33=HiZ
.padio (SCK_33), //pin to SCK of LTC2380-24
.combout (B13)); //
defparam d_bit_13.operation_mode = "bidir";
This is an instantiation of a module named max_ii_io. datain, oe, padio, and combout are the I/O of the module and sclk, DC2026_DETECT, SCK_33, and B13 are what they connect to in the current level of the design. The defparam is sending a parameter value of "bidir" to a parameter named operation_mode in the instantiated module.