HD6433308 Datasheet, PDF (296/349 Pages) Hitachi Semiconductor – Hitachi Single-Chip MicroComputer

(4) Write Cycle
RS3 to RS0
OE
CS
WE
DDB7 to DDB0
t_DAS
t DCW ^3*
t DAW
t
2*
DWR
t
1*
DWP
t DDW
t _DDH
Notes: 1. Data are written while CS and WE are both low (tDWP).
2. tDWR is measured from the rise of CS or WE, whichever rises first.
3. If CS goes Low at the same time as WE goes Low or after WE goes Low, the output remains in the high-
impedance state.
Figure 17-21. Dual-Port RAM Write Timing
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