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90USB1287-16AU 参数 Datasheet PDF下载

90USB1287-16AU图片预览
型号: 90USB1287-16AU
PDF下载: 下载PDF文件 查看货源
内容描述: 单片机具有ISP功能的Flash和USB控制器64 / 128K字节 [Microcontroller with 64/128K Bytes of ISP Flash and USB Controller]
分类和应用: 微控制器
文件页数/大小: 434 页 / 3172 K
品牌: ATMEL [ ATMEL ]
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AT90USB64/128  
Figure 20-13. Formats and States in the Master Transmitter Mode  
MT  
Successfull  
S
SLA  
W
A
DATA  
A
P
transmission  
to a slave  
receiver  
$08  
$18  
$28  
Next transfer  
started with a  
repeated start  
condition  
RS  
SLA  
W
R
$10  
Not acknowledge  
received after the  
slave address  
A
P
$20  
MR  
Not acknowledge  
received after a data  
byte  
A
P
$30  
Arbitration lost in slave  
address or data byte  
Other master  
continues  
Other master  
continues  
A or A  
A or A  
$38  
A
$38  
Arbitration lost and  
addressed as slave  
Other master  
continues  
To corresponding  
states in slave mode  
$68 $78 $B0  
Any number of data bytes  
and their associated acknowledge bits  
From master to slave  
From slave to master  
DATA  
A
This number (contained in TWSR) corresponds  
to a defined state of the Two-Wire Serial Bus. The  
prescaler bits are zero or masked to zero  
n
20.8.2  
Master Receiver Mode  
In the Master Receiver mode, a number of data bytes are received from a Slave Transmitter  
(Slave see Figure 20-14). In order to enter a Master mode, a START condition must be transmit-  
ted. The format of the following address packet determines whether Master Transmitter or  
Master Receiver mode is to be entered. If SLA+W is transmitted, MT mode is entered, if SLA+R  
is transmitted, MR mode is entered. All the status codes mentioned in this section assume that  
the prescaler bits are zero or are masked to zero.  
235  
7593A–AVR–02/06  
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