541CHAPTER 23 EXTERNAL DEVICE EXPANSION FUNCTIONFigure 23-10. External Memory Read Timing in Separate Bus Mode(a) No wait (PW1, PW0 = 0, 0) setting(b) Wait (PW1, PW0 = 0, 1) setting(c) External wait (PW1, PW0 = 1, 1) settingNote In the separate bus mode, use of the address strobe signal is not required though it is output fromthe ASTB/P67 pin.ASTBNoteRDAD0 to AD7A0 to A7A8 to A15Lower Address Read DataHigher AddressLower AddressASTBNoteRDAD0 to AD7A0 to A7A8 to A15Lower Address Read DataHigher AddressLower AddressInternal Wait Signal(1-clock wait)ASTBNoteRDLower Address Read DataHigher AddressLower AddressAD0 to AD7A0 to A7A8 to A15WAIT
