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ATMEGA48PA-CCU 参数 Datasheet PDF下载

ATMEGA48PA-CCU图片预览
型号: ATMEGA48PA-CCU
PDF下载: 下载PDF文件 查看货源
内容描述: [RISC Microcontroller, 8-Bit, FLASH, AVR RISC CPU, 20MHz, CMOS, PBGA32, 4 X 4 MM, 0.60 MM HEIGHT, 0.50 MM PITCH, GREEN, PLASTIC, UFBGA-32]
分类和应用: 闪存微控制器
文件页数/大小: 349 页 / 2752 K
品牌: ATMEL [ ATMEL ]
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Receiving Frames with 9 Data If 9-bit characters are used (UCSZn=7) the ninth bit must be read from the RXB8n bit in  
Bits  
UCSRnB before reading the low bits from the UDRn. This rule applies to the FEn,  
DORn and UPEn Status Flags as well. Read status from UCSRnA, then data from  
UDRn. Reading the UDRn I/O location will change the state of the receive buffer FIFO  
and consequently the TXB8n, FEn, DORn and UPEn bits, which all are stored in the  
FIFO, will change.  
The following code example shows a simple USART receive function that handles both  
nine bit characters and the status bits.  
172  
ATmega48/88/168  
2545D–AVR–07/04  
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