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ATmega324P Datasheet(PDF) 331 Page - ATMEL Corporation

Part # ATmega324P
Description  8-bit Microcontroller with 16/32/64K Bytes In-System Programmable Flash
PDF  377 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega324P Datasheet(HTML) 331 Page - ATMEL Corporation

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331
7674F–AVR–09/09
ATmega164P/324P/644P
26.3
Clock Characteristics
26.3.1
External Clock Drive Waveforms
Figure 26-2. External Clock Drive Waveforms
26.3.2
External Clock Drive
Note:
1. Values indicated represent typical data from design simulation.
Table 26-2.
Calibration Accuracy of Internal RC Oscillator
Frequency
VCC
Temperature
Calibration Accuracy
Factory
Calibration
8.0 MHz
3V
25
° C±2%
2.7V - 5.5V
-40
° C - 125° C
±14%
VIL1
VIH1
Table 26-3.
External Clock Drive
(1)
Symbol
Parameter
VCC=2.7-5.5V
VCC=4.5-5.5V
Units
Min.
Max.
Min.
Max.
1/tCLCL
Oscillator
Frequency
08
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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