Are Renewal clauses in a contract the same or linked to a Termination clause?

If a contract states in a Renewal Clause that non-renewal may be without cause and then there is a Termination clause that states termination is to be with cause, mediated, etc,. how are these two linked? Ie, is terminating a contract the same as not renewing an existing contract that automatically renews each year unless notice is given? I am trying to find out if I can not renew a contract that has been in place several years within the prescribed notice period without cause and not have to go through the process involved in Termination clause of the contract. Are they separate actions for separate purposes?