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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 13/36頁(yè) |
| 文件大?。?/td> | 813K |
| 代理商： | P83C251TQ24 |
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14
8xC251TB/TQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
6.2
Definition of AC Symbols
Table 10. AC Timing Symbol Definitions
Signals
Conditions
A
Address
H
High
D
Data In
L
Low
L
ALE
V
Valid
Q
Data Out
X
No Longer Valid
R
RD#/PSEN#
Z
Floating
W
WR#
6.3
A.C. Characteristics
Test Conditions: Capacitive load on all pins = 50 pF.
Table 11 lists AC timing parameters for the with no wait
states. External wait states can be added by extending
PSEN#/RD#/WR# and/or by extending ALE. In the table,
Notes 2 and 3 mark parameters affected by an
ALE wait state, and Notes 4 and 5 mark parameters
affected by a PSEN#/RD#/WR# wait state.
Table 11. AC Characteristics (Sheet 1 of 4)
Symbol
Parameter
@ Max FOSC (1)
FOSC Variable
Units
Min
Max
Min
Max
FOSC
XTAL1 Frequency
N/A
0
24
MHz
TOSC
1/FOSC
@ 16MHz
@ 24MHz
N/A
62.5
41.7
ns
TLHLL
ALE Pulse Width
@ 16MHz
@ 24MHz
55.5
34.7
(0.5+M)
2TOSC-7
ns (3)
TAVLL
Address Valid to ALE Low
@ 16MHz
@ 24MHz
49.5
28.7
(0.5+M)
2TOSC-13
ns (3)
TLLAX
Address Hold after ALE Low
@ 16MHz
@ 24MHz
10
ns (4)
TLLAXA
Address Hold after ALE Low
@ 16MHz
@ 24MHz
20
ns (5)
TRLRH
RD# or PSEN# Pulse Width
@ 16MHz
@ 24MHz
115
73.4
(1+N)
2TOSC-10
ns (3,4)
TRLRHA
RD# or PSEN# Pulse Width
@ 16MHz
@ 24MHz
93
51.4
(1+N)
2TOSC-32
ns (3,5)
TWLWH
WR# Pulse Width
@ 16MHz
@ 24MHz
115
73.4
(1+N)
2TOSC-10
ns (3,4)
TWLWHA
WR# Pulse Width
@ 16MHz
@ 24MHz
93
51.4
(1+N)
2TOSC-32
ns (3,5)
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