FSM Interface
Clk, Reset Zero - kicks off zero operation Cnt_eq - AEB output from comparator
set_busy, clr_busy - used to Set/Reset JKFF that provides the busy output addr_sel -- mux select line for addr, data muxes cnt_en -- count enable for counter ld_cnt -- synchronous load line for counter zero_we -- WE output of FSM, will be OR’ed with external WE