NEC uPD78P078 - Manual (Page 537)

537
CHAPTER 23 EXTERNAL DEVICE EXPANSION FUNCTION
Figure 23-7. External Memory Write Timing in Multiplexed Bus Mode
(a) No wait (PW1, PW0 = 0, 0) setting
(b) Wait (PW1, PW0 = 0, 1) setting
(c) External wait (PW1, PW0 = 1, 1) setting
ASTB
WR
AD0 to AD7
A8 to A15
Lower Address Write Data
Hi-Z
Higher Address
ASTB
WR
AD0 to AD7
A8 to A15
Lower Address Write Data
Higher Address
Internal Wait Signal
(1-clock wait)
Hi-Z
ASTB
WR
Higher Address
AD0 to AD7
A8 to A15
WAIT
Hi-Z
Lower Address Write Data