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ATmega128 Datasheet(PDF) 320 Page - ATMEL Corporation

Part # ATmega128
Description  8-bit Microcontroller with 128K Bytes In-System Programmable Flash
PDF  386 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega128 Datasheet(HTML) 320 Page - ATMEL Corporation

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320
2467S–AVR–07/09
ATmega128
Speed Grades
Figure 152. Maximum frequency vs. V
CC
External Clock
Drive Waveforms
Figure 153. External Clock Drive Waveforms
External Clock
Drive
2.7V
4.5V
5.5V
Safe Operating Area
16 MHz
8 MHz
VIL1
VIH1
Table 131. External Clock Drive
Symbol
Parameter
VCC = 2.7V to 5.5VVCC = 4.5V to 5.5V
Units
Min
Max
Min
Max
1/tCLCL
Oscillator Frequency
0
8
0
16
MHz
tCLCL
Clock Period
125
62.5
ns
tCHCX
High Time
50
25
ns
tCLCX
Low Time
50
25
ns
tCLCH
Rise Time
1.6
0.5
μs
tCHCL
Fall Time
1.6
0.5
μs
Δt
CLCL
Change in period from
one clock cycle to the
next
22
%



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