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Intel 8XC251SA User Manual Page 28

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28 PRELIMINARY
8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
5.3.3 DEFINITION OF REAL-TIME WAIT SYMBOLS
5.3.4 EXTERNAL BUS CYCLES, REAL-TIME WAIT STATES
Figure 13. External Bus Cycle: Code Fetch/Data Read (Nonpage Mode)
Table 12. Real-time Wait Timing Symbol Definitions
Signals Conditions
A Address L Low
DData XHold
C WCLK V Setup
Y WAIT#
W WR#
R RD#/PSEN#
A0-A7
WCLK
ALE
RD#/PSEN#
WAIT#
P0
P2
A8-A15
A5000-01
State 1 State 2 State 3 State 1 (next cycle)
T
CLYX
min
T
CLYV
A0-A7D0-D7 stretched
A8-A15 stretched
RD#/PSEN# stretched
T
CLYX
max
T
RLYV
T
RLYX
max
T
RLYX
min
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