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| 型號(hào)： | MEGA32C1-ESAZ |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 16 MHz, RISC MICROCONTROLLER, PQFP32 |
| 封裝： | 7 X 7 MM, 1 MM HEIGHT, 0.50 MM PITCH, LEAD FREE, PLASTIC, TQFP-32 |
| 文件頁(yè)數(shù)： | 7/95頁(yè) |
| 文件大?。?/td> | 6074K |
| 代理商： | MEGA32C1-ESAZ |
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164
ATtiny25/45/85 [DATASHEET]
2586Q–AVR–08/2013
21.4
Clock Characteristics
21.4.1
Calibrated Internal RC Oscillator Accuracy
It is possible to manually calibrate the internal oscillator to be more accurate than default factory calibration. Please
note that the oscillator frequency depends on temperature and voltage. Voltage and temperature characteristics
can be found in Figure 22-40 on page 193 and Figure 22-41 on page 193.
Notes:
1. Accuracy of oscillator frequency at calibration point (fixed temperature and fixed voltage).
2. ATtiny25/V, only: 6.4 MHz in ATtiny15 Compatibility Mode.
3. Voltage range for ATtiny25V/45V/85V.
4. Voltage range for ATtiny25/45/85.
21.4.2
External Clock Drive
Figure 21-3. External Clock Drive Waveforms
Table 21-2.
Calibration Accuracy of Internal RC Oscillator
Calibration
Method
Target Frequency
VCC
Temperature
Accuracy at given Voltage
& Temperature (1)
Factory
Calibration
8.0 MHz (2)
3V
25
C±10%
User
Calibration
Fixed frequency within:
6 – 8 MHz
Fixed voltage within:
1.8V - 5.5V (3)
2.7V - 5.5V (4)
Fixed temperature
within:
-40
C to +85C
±1%
VIL1
VIH1
Table 21-3.
External Clock Drive Characteristics
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
s
tCHCL
Fall Time
2.0
1.6
0.5
s
t
CLCL
Change in period from one clock cycle to the next
2
%
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相關(guān)代理商/技術(shù)參數(shù) |
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| MEGA32C1-ESMZ | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 16K/32K/64K Bytes In-System Programmable Flash |
| MEGA32M1-15AZ | 制造商:Atmel Corporation 功能描述: |
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| MEGA32M1-ESAZ | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 16K/32K/64K Bytes In-System Programmable Flash |
| MEGA32M1-ESMZ | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 16K/32K/64K Bytes In-System Programmable Flash |
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