83C251SP View Datasheet(PDF) - Intel
Part Name
Description
MFG CO.
'83C251SP' PDF : 36 Pages View PDF
8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
WCLK
ALE
WR#
WAIT#
P0
P2
State 1
State 2
State 3
State 4
TWLYX max
TWLYX min
TWLYV
TCLYV
TCLYX min
TCLYX max
WR# stretched
A0-A7
D0-D7
A8-A15
stretched
stretched
Figure 14. External Bus Cycle: Data Write (Nonpage Mode)
A5002-01
WCLK
ALE
RD#/PSEN#
WAIT#
State 1
State 2
State 3
State 1 (next cycle)
TRLYX max
TRLYX min
TRLYV
TCLYV
TCLYX min
TCLYX max
RD#/PSEN# stretched
P2
A8-A15
D0-D7
stretched
A8-A15
P0
A0-A7
stretched
A0-A7
Figure 15. External Bus Cycle: Code Fetch/Data Read (Page Mode)
A5001-01
PRELIMINARY
29
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