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8XC51RC датащит (Datasheet) 11 Page - Intel Corporation

№ деталь 8XC51RC
подробность  CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
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производитель  INTEL [Intel Corporation]
домашняя страница  http://www.intel.com
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8XC51RARBRC
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 8XC51RX refers to
8XC51RX and 8XC51RX-1 8XC51RX-24 refers to 8XC51RX-20 and 8XC51RX-24
Symbol
Description
12 MHz
20 MHz
24 MHz
Variable
Units
Oscillator
Oscillator
Oscillator
Oscillator
Min
Max
Min
Max
Min
Max
Min
Max
1TCLCL
Oscillator Frequency
8XC51RX
35
12
MHz
8XC51RX-1
35
16
MHz
8XC51RX-20
35
20
MHz
8XC51RX-24
35
24
MHz
TLHLL
ALE Pulse Width
127
60
43
2 TCLCL b 40
ns
TAVLL
Address Valid to
43
10
12
TCLCL b 40
ns
ALE Low
TLLAX
Address Hold After
53
20
12
TCLCL b 30
ns
ALE Low
TLLIV
ALE Low to Valid
Instruction In
8XC51RX
234
4 TCLCL b 100
ns
8XC51RX-24
125
91
4 TCLCL b 75
ns
TLLPL
ALE Low to PSEN
53
20
12
TCLCL b 30
ns
Low
TPLPH
PSEN Pulse Width
205
105
80
3 TCLCL b 45
ns
TPLIV
PSEN Low to Valid
Instruction In
8XC51RX
145
3 TCLCL b 105
ns
8XC51RX-24
60
35
3 TCLCL b 90
ns
TPXIX
Input Instruction
0
0
0
0
ns
Hold After PSEN
11




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