I am considering using the built-in RC oscillation, which is a setting item of the Speech LSI Utility in the data sheet for the ML2253x series and ML226xx series. Where should I set it in the Speech LSI Utility?
It can be selected from the menu Options on the Speech LSI Utility. Select "RC" in the Source clock oscillation of the User setting Parameter. For details, refer to the Speech LSI Utility User's Manual.