HD643303x Hitachi, HD643303x Datasheet - Page 129

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

Pin Auto-Wait Mode: If the WAIT pin is low, the number of wait states (T
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 T
the number of wait states (T
states are inserted even if the WAIT pin remains low.
Figure 6-7 shows the timing when the wait count is 1.
Read
access
Write
access
Note:
*
Arrows indicate time of sampling of the
ø
WAIT
Address bus
AS
RD
Data bus
WR
Data bus
T
W
1
) selected by bits WC1 and WC0 are inserted. No additional wait
External address
Figure 6-7 Pin Auto-Wait Mode
Write data
T
2
*
Read data
WAIT
T
3
114
pin.
T
1
T
External address
2
*
Write data
T
W
W
) selected by bits
Read data
T
3
2
state,