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ATmega64A Datasheet(PDF) 329 Page - ATMEL Corporation

Part # ATmega64A
Description  8-bit Microcontroller with 64K Bytes In-System Programmable Flash
PDF  392 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega64A Datasheet(HTML) 329 Page - ATMEL Corporation

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329
8160C–AVR–07/09
ATmega64A
28.3
Speed Grades
Figure 28-1. Maximum Frequency vs. Vcc
28.4
Clock Characteristics
28.4.1
External Clock Drive Waveforms
Figure 28-2. External Clock Drive Waveforms
28.4.2
External Clock Drive
2.7V
4.5V
5.5V
Safe Operating Area
16 MHz
8 MHz
VIL1
VIH1
Table 28-1.
External Clock Drive
(1)
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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