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參數(shù)資料
| 型號： | 8XL51FC |
| 英文描述： | LOW VOLTAGE CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLERS |
| 中文描述： | 低壓CHMOS單片8位微控制器 |
| 文件頁數(shù)： | 11/20頁 |
| 文件大?。?/td> | 285K |
| 代理商： | 8XL51FC |
8XL51FA/FB/FC
EXPLANATION OF THE AC SYMBOLS
Each timing symbol has 5 characters. The first char-
acter is always a ‘T’ (stands for time). The other
characters, depending on their positions, stand for
the name of a signal or the logical status of that
signal. The following is a list of all the characters and
what they stand for.
A: Address
C: Clock
D: Input Data
H: Logic level HIGH
I: Instruction (program memory contents)
L: Logic level LOW, or ALE
P: PSEN
Q: Output Data
R: RD signal
T: Time
V: Valid
W: WR signal
X: No longer a valid logic level
Z: Float
For example,
TAVLL
e
Time from Address Valid to ALE Low
TLLPL
e
Time from ALE Low to PSEN Low
AC CHARACTERISTICS
(Over Operating Conditions, Load Capacitance for Port 0, ALE/PROG and
PSEN
e
100 pF, Load Capacitance for All Other Outputs
e
80 pF)
EXTERNAL MEMORY CHARACTERISTICS
All parameter values apply to all devices unless otherwise indicated. In this table, 8XL51FX refers to 8XL51FX
and 8XL51FX-1.
Symbol
Parameter
12 MHz
Oscillator
20 MHz
Oscillator
Variable
Oscillator
Units
Min
Max
Min
Max
Min
Max
1/TCLCL
Oscillator Frequency
8XL51FX
8XL51FX-1
8XL51FX-20
3.5
3.5
3.5
12
16
20
MHz
MHz
MHz
TLHLL
ALE Pulse Width
127
60
2 TCLCL
b
40
ns
TAVLL
Address Valid to
ALE Low
43
10
TCLCL
b
40
ns
TLLAX
Address Hold After
ALE Low
53
20
TCLCL
b
30
ns
TLLIV
ALE Low to Valid
Instruction In
8XL51FX
8XL51FX-20
234
4 TCLCL
b
100
4 TCLCL
b
75
ns
ns
TLLPL
ALE Low to PSEN
Low
53
20
TCLCL
b
30
ns
TPLPH
PSEN Pulse Width
205
105
3 TCLCL
b
45
ns
TPLIV
PSEN Low to Valid
Instruction In
8XL51FX
8XL51FX-20
145
3 TCLCL
b
105
3 TCLCL
b
90
ns
ns
60
TPXIX
Input Instruction
Hold After PSEN
0
0
0
ns
11
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