HD6433045 HITACHI [Hitachi Semiconductor], HD6433045 Datasheet - Page 150
HD6433045
Manufacturer Part Number
HD6433045
Description
Hitachi Single-Chip Microcomputer
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet
1.HD6433045.pdf
(867 pages)
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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
number of wait states (T
are inserted even if the WAIT pin remains low. Pin auto-wait mode can be used for an easy
interface to low-speed memory, simply by routing the chip select signal to the WAIT pin.
Figure 6-14 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
HWR
Data bus
, LWR
W
) selected by bits WC1 and WC0 are inserted. No additional wait states
T
1
Figure 6-14 Pin Auto-Wait Mode
External address
Write data
T
2
*
Read data
WAIT
T
136
3
pin.
T
1
T
External address
2
*
Write data
T
W
W
) selected by bits
Read data
T
3
2
state, the
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