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AT89C2051-12PC Datasheet(PDF) 13 Page - ATMEL Corporation

Part No. AT89C2051-12PC
Description  8-bit Microcontroller with 2K Bytes Flash
Download  20 Pages
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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AT89C2051-12PC Datasheet(HTML) 13 Page - ATMEL Corporation

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13
0368G–MICRO–6/05
AT89C2051
18. External Clock Drive Waveforms
()
19. External Clock Drive
Symbol
Parameter
V
CC = 2.7V to 6.0V
V
CC = 4.0V to 6.0V
Units
Min
Max
Min
Max
1/tCLCL
Oscillator Frequency
0
12
0
24
MHz
t
CLCL
Clock Period
83.3
41.6
ns
t
CHCX
High Time
30
15
ns
tCLCX
Low Time
30
15
ns
t
CLCH
Rise Time
20
20
ns
t
CHCL
Fall Time
20
20
ns
20. Serial Port Timing: Shift Register Mode Test Conditions
VCC = 5.0V ± 20%; Load Capacitance = 80 pF
Symbol
Parameter
12 MHz Osc
Variable Oscillator
Units
Min
Max
Min
Max
t
XLXL
Serial Port Clock Cycle Time
1.0
12 t
CLCL
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-117
ns
t
XHDX
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


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