80C251SB16 Datasheet, PDF (28/36 Pages) Intel Corporation – HIGH-PERFORMANCE CHMOS MICROCONTROLLER

8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
5.3.3 DEFINITION OF REAL-TIME WAIT SYMBOLS
Table 12. Real-time Wait Timing Symbol Definitions
Signals
A Address
D Data
C WCLK
Y WAIT#
W WR#
R RD#/PSEN#
Conditions
L Low
X Hold
V Setup
5.3.4 EXTERNAL BUS CYCLES, REAL-TIME WAIT STATES
WCLK
ALE
RD#/PSEN#
WAIT#
State 1
State 2
State 3
State 1 (next cycle)
T_RLYX max
T_RLYX min
T_RLYV
T_CLYV
T_CLYX min
T_CLYX max
RD#/PSEN# stretched
P0
A0-A7
D0-D7
stretched
A0-A7
P2
A8-A15
stretched
A8-A15
Figure 13. External Bus Cycle: Code Fetch/Data Read (Nonpage Mode)
A5000-01
28
PRELIMINARY