We can accurately and unambiguously define transactions using PSL Regular Expressions:
Read transaction
( (PADDR==addr_arg) && !PWRITE && PSEL && !PENABLE) ;
( (PADDR==addr_arg) && !PWRITE && PSEL && PENABLE && (PRDATA == data_arg) )
Write transaction
( (PADDR==addr_arg) && PWRITE && PSEL && !PENABLE && (PWDATA == data_arg) ) ;
( (PADDR==addr_arg) && PWRITE && PSEL && PENABLE && (PWDATA == data_arg) )
