at89c51rd2-smsum ATMEL Corporation, at89c51rd2-smsum Datasheet - Page 118
at89c51rd2-smsum
Manufacturer Part Number
at89c51rd2-smsum
Description
8-bit Flash Microcontroller
Manufacturer
ATMEL Corporation
Datasheet
1.AT89C51RD2-SMSUM.pdf
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25.3.2
118
AT89C51RD2/ED2
External Program Memory Characteristics
Table 25-1.
Table 25-2.
Symbol
T
T
T
T
T
T
T
T
T
T
T
PLPH
LHLL
AVLL
LLAX
PLAZ
LLPL
PLIV
PXIX
PXIZ
AVIV
LLIV
T
Symbol Description
AC Parameters for a Fix Clock
Symbol
T
T
T
T
T
T
T
T
T
T
T
PLPH
LHLL
AVLL
LLAX
LLPL
PLAZ
LLIV
PLIV
PXIX
PXIZ
AVIV
T
Parameter
Oscillator clock period
ALE pulse width
Address Valid to ALE
Address Hold After ALE
ALE to Valid Instruction In
ALE to PSEN
PSEN Pulse Width
PSEN to Valid Instruction In
Input Instruction Hold After PSEN
Input Instruction Float After PSEN
Address to Valid Instruction In
PSEN Low to Address Float
Min
25
35
50
5
5
5
0
-M
Max
n 65
30
10
80
10
4235J–8051–01/08
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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