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8XC251SA Fiches technique(PDF) 25 Page - Intel Corporation

No de pièce 8XC251SA
Description  HIGH-PERFORMANCE CHMOS MICROCONTROLLER
Download  36 Pages
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Fabricant  INTEL [Intel Corporation]
Site Internet  http://www.intel.com
Logo INTEL - Intel Corporation

8XC251SA Fiches technique(HTML) 25 Page - Intel Corporation

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PRELIMINARY
25
8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
5.3.2
EXTERNAL BUS CYCLES, PAGE MODE
Figure 10. External Bus Cycle: Code Fetch (Page Mode)
XTAL1
ALE
TLHLL
A15:8
D7:0
TRHDZ1
RD#/PSEN#
P2
P0/A16/A17
TRHDX
TLLRL
TAVLL
TRLDV
TRLAZ
TAVRL
TAVDV1
TAVDV2
TOSC
A4213-02
TLHAX
Instruction In
A7:0/A16/A17
D7:0
Instruction In
A7:0/A16/A17
Page Miss††
Page Hit††
TAVDV3
The value of this parameter depends on wait states. See the table of AC characteristics.
††
A page hit (i.e., a code fetch to the same 256-byte "page" as the previous code fetch) requires one
state (2TOSC); a page miss requires two states (4TOSC).
††† During a sequence of page hits, PSEN# remains low until the end of the last page-hit cycle.
TLLAX
†††


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