HD6473032F Datasheet, PDF (129/572 Pages) Hitachi Semiconductor – Hitachi Microcomputer

Pin Auto-Wait Mode: If the WAIT pin is low, the number of wait states (T_W) selected by bits
WC1 and WC0 are inserted.
In pin auto-wait mode, if the WAIT pin is low at the fall of the system clock (ø) in the T₂ state,
the number of wait states (T_W) selected by bits WC1 and WC0 are inserted. No additional wait
states are inserted even if the WAIT pin remains low.
Figure 6-7 shows the timing when the wait count is 1.
T₁
T₂
T₃
T₁
ø
*
WAIT
Address bus
AS
External address
Read
access
RD
Data bus
Read data
Write
access
WR
Data bus
Write data
Note: * Arrows indicate time of sampling of the WAIT pin.
T₂
T_W
T₃
*
External address
Read data
Write data
Figure 6-7 Pin Auto-Wait Mode
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