Table of Contents
Advertisement
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 T
wait states continue to be inserted until the WAIT signal goes high. Figure 6-5 shows the timing.
Read
access
Write
access
Note:
Downloaded from
Elcodis.com
electronic components distributor
state, a wait state (T
2
T
1
ø
WAIT
pin
Address bus
AS
RD
Data bus
WR
Data bus
Arrows indicate time of sampling of the
*
Figure 6-5 Pin Wait Mode 0
) is inserted. If the WAIT pin remains low,
W
WAIT
Inserted by
signal
T
T
T
2
W
W
*
*
External address
Write data
WAIT
pin.
112
T
3
*
Read data
Advertisement
Table of Contents
