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CHAPTER 23 LOCAL BUS INTERFACE FUNCTIONS
User’s Manual U12697EJ3V0UM
Figure 23-11. Write Timing by Access Wait Function (1/2)
(a) Setting 0 wait cycles (PW01, PW00 = 0, 0)
f
XX
Note
Higher address
ASTB (output)
AD0 to AD7
(output)
A8 to A19
(output)
Hi-Z
Hi-Z
WR (output)
Data
Lower
address
Hi-Z
(b) Setting 1 wait cycle (PW01, PW00 = 0, 1)
f
XX
Note
Higher address
ASTB (output)
AD0 to AD7
(output)
A8 to A19
(output)
Hi-Z
Hi-Z
WR (output)
Data
Lower
address
Hi-Z
Note
f
XX
: Main system clock frequency. This signal is only in the
µ
PD784225.