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ATtiny13A 데이터시트(PDF) 119 Page - ATMEL Corporation

부품명 ATtiny13A
상세설명  8-bit Microcontroller with 1K Bytes In-System Programmable Flash
PDF  174 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATtiny13A 데이터시트(HTML) 119 Page - ATMEL Corporation

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119
8126D–AVR–11/09
ATtiny13A
18.4 Clock Characteristics
18.4.1
Calibrated Internal RC Oscillator Accuracy
It is possible to manually calibrate the internal oscillator to be more accurate than default factory
calibration. Note that the oscillator frequency depends on temperature and voltage. Voltage and
temperature characteristics can be found in Figure 19-46 on page 147, Figure 19-47 on page
148, Figure 19-48 on page 148, Figure 19-49 on page 149, Figure 19-50 on page 149, and Fig-
ure 19-51 on page 150.
Notes: 1. Accuracy of oscillator frequency at calibration point (fixed temperature and fixed voltage).
18.4.2
External Clock Drive
Figure 18-2. External Clock Drive Waveform
Table 18-2.
Calibration Accuracy of Internal RC Oscillator
Calibration
Method
Target Frequency
VCC
Temperature
Accuracy at given Voltage
& Temperature(1)
Factory
Calibration
4.8 / 9.6 MHz
3V
25
⋅C±10%
User
Calibration
Fixed frequency within:
4 – 5 MHz / 8 – 10 MHz
Fixed voltage within:
1.8V – 5.5V
Fixed temperature
within:
-40
⋅C – 85⋅C
±2%
VIL1
VIH1
Table 18-3.
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
Clock Frequency
0
4
0
10
0
20
MHz
tCLCL
Clock Period
250
100
50
ns
tCHCX
High Time
100
40
20
ns
tCLCX
Low Time
100
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
2
2
2
%



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