513CHAPTER 22 EXTERNAL DEVICE EXPANSION FUNCTIONASTBWRHigher AddressAD0 to AD7A8 to A15WAITHi-ZLower Address Write DataASTBWRAD0 to AD7A8 to A15Lower Address Write DataHigher AddressInternal Wait Signal(1-clock wait)Hi-ZASTBWRAD0 to AD7A8 to A15Lower Address Write DataHi-ZHigher AddressFigure 22-6. External Memory Write Timing(a) No wait (PW1, PW0 = 0, 0) setting(b) Wait (PW1, PW0 = 0, 1) setting(c) External wait (PW1, PW0 = 1, 1) setting
