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AT89S52-24PU データシート(PDF) 33 Page - ATMEL Corporation

部品番号 AT89S52-24PU
部品情報  8-bit Microcontroller with 8K Bytes In-System Programmable Flash
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メーカー  ATMEL [ATMEL Corporation]
ホームページ  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89S52-24PU データシート(HTML) 33 Page - ATMEL Corporation

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33
1919D–MICRO–6/08
AT89S52
35. Shift Register Mode Timing Waveforms
36. AC Testing Input/Output Waveforms(1)
Note:
1. AC Inputs during testing are driven at V
CC - 0.5V
for a logic 1 and 0.45V for a logic 0. Timing measurements are made at V
IH min. for a logic 1 and VIL max. for a logic 0.
37. Float Waveforms(1)
Note:
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 VOH/VOL level occurs.
34. Serial Port Timing: Shift Register Mode Test Conditions
The values in this table are valid for V
CC = 4.0V to 5.5V and Load Capacitance = 80 pF.
Symbol
Parameter
12 MHz Osc
Variable Oscillator
Units
Min
Max
Min
Max
tXLXL
Serial Port Clock Cycle Time
1.0
12 tCLCL
μs
t
QVXH
Output Data Setup to Clock Rising Edge
700
10 t
CLCL-133
ns
tXHQX
Output Data Hold After Clock Rising Edge
50
2 tCLCL-80
ns
tXHDX
Input Data Hold After Clock Rising Edge
0
0
ns
t
XHDV
Clock Rising Edge to Input Data Valid
700
10 t
CLCL-133
ns
t
XHDV
t
QVXH
t
XLXL
t
XHDX
t
XHQX
ALE
INPUT DATA
CLEAR RI
OUTPUT DATA
WRITE TO SBUF
INSTRUCTION
CLOCK
0
0
1
1
2
2
3
3
4
4
5
5
6
6
7
7
SET TI
SET RI
8
VALID
VALID
VALID
VALID
VALID
VALID
VALID
VALID
0.45V
TEST POINTS
V
- 0.5V
CC
0.2 V
+ 0.9V
CC
0.2 V
- 0.1V
CC
V
LOAD
+ 0.1V
Timing Reference
Points
V
LOAD
- 0.1V
LOAD
V
V
OL
+ 0.1V
V
OL
- 0.1V


同様の部品番号 - AT89S52-24PU

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logo
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   8-bit Microcontroller with 8K Bytes In-System Programmable Flash
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