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ATMEGA8A-AUR 参数 Datasheet PDF下载

ATMEGA8A-AUR图片预览
型号: ATMEGA8A-AUR
PDF下载: 下载PDF文件 查看货源
内容描述: [RISC Microcontroller, 8-Bit, FLASH, AVR RISC CPU, 16MHz, CMOS, PQFP32, 7 X 7 MM, 1 MM HEIGHT, 0.80 MM PITCH, GREEN, PLASTIC, MS-026ABA, TQFP-32]
分类和应用: 闪存
文件页数/大小: 308 页 / 4674 K
品牌: ATMEL [ ATMEL ]
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Figure 75. Arbitration Between Two Masters  
START  
Master A Loses  
Arbitration, SDAA SDA  
SDA from  
Master A  
SDA from  
Master B  
SDA Line  
Synchronized  
SCL Line  
Note that arbitration is not allowed between:  
A REPEATED START condition and a data bit.  
A STOP condition and a data bit.  
A REPEATED START and a STOP condition.  
It is the user software’s responsibility to ensure that these illegal arbitration conditions never  
occur. This implies that in multi-master systems, all data transfers must use the same composi-  
tion of SLA+R/W and data packets. In other words: All transmissions must contain the same  
number of data packets, otherwise the result of the arbitration is undefined.  
168  
ATmega8(L)  
2486T–AVR–05/08  
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