Upon the return of a verdict of guilty in a case tried by a jury, or a finding of guilty in a case tried by a circuit court without a jury, sentence may be pronounced and the judgment of the court may be then and there entered, or sentencing and the entry of the judgment may be postponed to a date certain then fixed by the court, not more than thirty (30) days thereafter, at which time probation reports may be submitted, matters of mitigation presented or any other matter heard that the court of the defendant might deem appropriate to consider before the pronouncement of sentence and entry of the formal judgment. The defendant may file a written demand for immediate sentencing, whereupon the trial judge may cause formal sentence and judgment to be made of record. At the time sentence is pronounced and judgment entered, the trial judge must advise the defendant of his right to appeal, the period of time prescribed for perfecting the appeal, and either fix or deny bond.