HD6473032F Datasheet, PDF (127/572 Pages) Hitachi Semiconductor – Hitachi Microcomputer

Pin Wait Mode 0: The wait state controller is disabled. Wait states can only be inserted by WAIT
pin control. During access to an external three-state-access area, if the WAIT pin is low at the fall
of the system clock (ø) in the T₂ state, a wait state (T_W) is inserted. If the WAIT pin remains low,
wait states continue to be inserted until the WAIT signal goes high. Figure 6-5 shows the timing.
Inserted by WAIT signal
T₁
T₂
T_W
T_W
T₃
ø
*
*
*
WAIT pin
Address bus
External address
AS
Read
access
RD
Data bus
Read data
Write
access
WR
Data bus
Write data
Note: * Arrows indicate time of sampling of the WAIT pin.
Figure 6-5 Pin Wait Mode 0
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