參數(shù)資料
型號: P83C251TQ24
廠商: INTEL CORP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 24 MHz, MICROCONTROLLER, PDIP40
封裝: PLASTIC, DIP-40
文件頁數(shù): 20/36頁
文件大?。?/td> 813K
代理商: P83C251TQ24
8xC251TB/TQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
21
6.3.2
External Bus Cycles, 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
Figure 8. External Bus Cycle: Code Fetch (Page Mode)
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