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ATMEGA48PA-AU 参数 Datasheet PDF下载

ATMEGA48PA-AU图片预览
型号: ATMEGA48PA-AU
PDF下载: 下载PDF文件 查看货源
内容描述: 8位微控制器与4/8/ 16 / 32K字节的系统内可编程闪存 [8-bit Microcontroller with 4/8/16/32K Bytes In-System Programmable Flash]
分类和应用: 闪存微控制器和处理器外围集成电路时钟
文件页数/大小: 448 页 / 12817 K
品牌: ATMEL [ ATMEL ]
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ATmega48PA/88PA/168PA/328P  
28.4 Clock Characteristics  
28.4.1  
Calibrated Internal RC Oscillator Accuracy  
Table 28-1. Calibration Accuracy of Internal RC Oscillator  
Frequency  
VCC  
Temperature  
Calibration Accuracy  
Factory  
Calibration  
8.0 MHz  
3V  
25°C  
±10%  
User  
Calibration  
7.3 - 8.1 MHz  
1.8V - 5.5V  
-40°C - 85°C  
±1%  
28.4.2  
External Clock Drive Waveforms  
Figure 28-2. External Clock Drive Waveforms  
V
IH1  
V
IL1  
28.4.3  
External Clock Drive  
Table 28-2. External Clock Drive  
VCC= 1.8 - 5.5V  
VCC= 2.7 - 5.5V  
VCC= 4.5 - 5.5V  
Symbol  
1/tCLCL  
tCLCL  
Parameter  
Oscillator Frequency  
Clock Period  
High Time  
Min.  
Max.  
Min.  
0
Max.  
Min.  
0
Max.  
Units  
MHz  
ns  
0
4
10  
20  
250  
100  
100  
100  
40  
50  
20  
20  
tCHCX  
tCLCX  
ns  
Low Time  
40  
ns  
tCLCH  
Rise Time  
2.0  
2.0  
1.6  
1.6  
0.5  
0.5  
μs  
tCHCL  
Fall Time  
μs  
Change in period from  
one clock cycle to the  
next  
ΔtCLCL  
2
2
2
%
Note:  
All DC Characteristics contained in this datasheet are based on simulation and characterization of other AVR microcontrollers  
manufactured in the same process technology. These values are preliminary values representing design targets, and will be  
updated after characterization of actual silicon.  
317  
8161D–AVR–10/09  
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