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ATmega325P Arkusz danych(PDF) 307 Page - ATMEL Corporation

Numer części ATmega325P
Szczegółowy opis  8-bit Microcontroller with 32K Bytes In-System Programmable Flash
PDF  364 Pages
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Producent  ATMEL [ATMEL Corporation]
Strona internetowa  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega325P Arkusz danych(HTML) 307 Page - ATMEL Corporation

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307
8023F–AVR–07/09
ATmega325P/3250P
26.4
Clock Characterizations
26.4.1
Calibrated Internal RC Oscillator Accuracy
Notes:
1. Voltage range for ATmega325PV/3250PV/645PV/6450PV.
2. Voltage range for ATmega325P/3250P.
26.4.2
External Clock Drive Waveforms
Figure 26-3. External Clock Drive Waveforms
26.4.3
External Clock Drive
Table 26-1.
Calibration Accuracy of Internal RC Oscillator
Frequency
V
CC
Temperature
Calibration Accuracy
Factory
Calibration
8.0 MHz
3V
25
⋅C±10%
User
Calibration
7.3 - 8.1 MHz
1.8V - 5.5V(1)
2.7V - 5.5V(2)
-40
⋅C - 85⋅C±1%
VIL1
VIH1
Table 26-2.
External Clock Drive
Symbol
Parameter
VCC=1.8-5.5V
VCC=2.7-5.5V
VCC=4.5-5.5V
Units
Min.
Max.
Min.
Max.
Min.
Max.
1/tCLCL
Oscillator
Frequency
04
0
10
0
20
MHz
tCLCL
Clock Period
1000
100
50
ns
tCHCX
High Time
400
40
20
ns
tCLCX
Low Time
400
40
20
ns
tCLCH
Rise Time
2.0
1.6
0.5
μs
tCHCL
Fall Time
2.0
1.6
0.5
μs
Δt
CLCL
Change in period
from one clock
cycle to the next
22
2
%



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