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8XC51FX Datasheet(PDF) 11 Page - Intel Corporation

No. de Pieza. 8XC51FX
Descripción  CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLERS
Descarga  20 Pages
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Fabricante  INTEL [Intel Corporation]
Página de inicio  http://www.intel.com
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8XC51FX Datasheet(HTML) 11 Page - Intel Corporation

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8XC51FX
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 ALEPROG 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 8XC51FX refers to
8XC51FX 8XC51FX-1 and 8XC51FX-2
Symbol
Parameter
Oscillator
Units
12 MHz
24 MHz
33 MHz
Variable
Min Max Min Max Min Max
Min
Max
1TCLCL Oscillator Frequency
MHz
8XC51FX
35
12
8XC51FX-1
35
16
8XC51FX-2
05
12
8XC51FX-24
35
24
8XC51FX-33
35
33
TLHLL
ALE Pulse Width
127
43
21
2TCLCLb40
ns
TAVLL
Address Valid to ALE Low
8XC51FX
43
TCLCLb40
ns
8XC51FX-24
12
TCLCLb30
ns
8XC51FX-33
5
TCLCLb25
ns
TLLAX
Address Hold After ALE Low
8XC51FX-24
53
12
TCLCLb30
ns
8XC51FX-33
5
TCLCLb25
ns
TLLIV
ALE Low to Valid Instr In
8XC51FX
234
4TCLCLb100
ns
8XC51FX-24
91
4TCLCLb75
ns
8XC51FX-33
56
4TCLCLb65
ns
TLLPL
ALE Low to PSEN Low
8XC51FX-24
53
12
TCLCLb30
ns
8XC51FX-33
5
TCLCLb25
ns
TPLPH
PSEN Pulse Width
205
80
46
3TCLCLb45
TPLIV
PSEN Low to Valid Instr In
8XC51FX
145
3TCLCLb105
ns
8XC51FX-24
35
3TCLCLb90
ns
8XC51FX-33
35
3TCLCLb55
ns
TPXIX
Input Instr Hold after PSEN
000
0
ns
11


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