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AT89S53 датащи(PDF) 29 Page - ATMEL Corporation

номер детали AT89S53
подробное описание детали  8-bit Microcontroller with 12K Bytes Flash
PDF  33 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89S53 датащи(HTML) 29 Page - ATMEL Corporation

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AT89S53
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Shift Register Mode Timing Waveforms
AC Testing Input/Output Waveforms(1)
Notes:
1. AC Inputs during testing are driven at V
CC - 0.5V
for a logic 1 and 0.45V for a logic 0. Timing measure-
ments are made at V
IH min. for a logic 1 and VIL max.
for a logic 0.
Float Waveforms(1)
Notes:
1. For timing purposes, a port pin is no longer floating
when a 100 mV change from load voltage occurs. A
port pin begins to float when a 100 mV change from
the loaded V
OH/VOL level occurs.
Serial Port Timing: Shift Register Mode Test Conditions
The values in this table are valid for V
CC = 4.0V to 6V and Load Capacitance = 80 pF
Symbol
Parameter
12 MHz Oscillator
Variable Oscillator
Units
Min
Max
Min
Max
t
XLXL
Serial Port Clock Cycle Time
1.0
12t
CLCL
µs
t
QVXH
Output Data Setup to Clock Rising
Edge
700
10t
CLCL - 133
ns
t
XHQX
Output Data Hold after Clock Rising
Edge
50
2t
CLCL - 117
ns
tXHDX
Input Data Hold after Clock Rising
Edge
00
ns
t
XHDV
Clock Rising Edge to Input Data
Valid
700
10t
CLCL - 133
ns



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