HD64F3437TF16 Datasheet, PDF (115/752 Pages) Hitachi Semiconductor – 12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.

5.3 Wait Modes
Programmable Wait Mode: The number of wait states (T_W) selected by bits WC1 and WC0 are
inserted in all accesses to external addresses. Figure 5.2 shows the timing when the wait count is 1
(WC1 = 0, WC0 = 1).
T₁
T₂
T_W
T₃
ø
Address bus
External address
AS
Read
access
RD
Data bus
Read data
Write
access
WR
Data bus
Write data
Figure 5.2 Programmable Wait Mode
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