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X24042S8M-3 参数 Datasheet PDF下载

X24042S8M-3图片预览
型号: X24042S8M-3
PDF下载: 下载PDF文件 查看货源
内容描述: 串行E2PROM [Serial E2PROM]
分类和应用: 可编程只读存储器
文件页数/大小: 15 页 / 64 K
品牌: XICOR [ XICOR INC. ]
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X24042  
DEVICE OPERATION  
Start Condition  
All commands are preceded by the start condition,  
which is a HIGH to LOW transition of SDA when SCL is  
HIGH. The X24042 continuously monitors the SDA and  
SCL lines for the start condition and will not respond to  
any command until this condition has been met.  
The X24042 supports a bidirectional bus oriented proto-  
col. The protocol defines any device that sends data  
onto the bus as a transmitter, and the receiving device  
as the receiver. The device controlling the transfer is a  
master and the device being controlled is the slave. The  
master will always initiate data transfers, and provide  
the clock for both transmit and receive operations.  
Therefore, the X24042 will be considered a slave in all  
applications.  
Stop Condition  
All communications must be terminated by a stop con-  
dition, which is a LOW to HIGH transition of SDA when  
SCL is HIGH. The stop condition is also used by the  
X24042toplacethedeviceintothestandbypowermode  
after a read sequence. A stop condition can only be  
issued after the transmitting device has released the  
bus.  
Clock and Data Conventions  
DatastatesontheSDAlinecanchangeonlyduringSCL  
LOW. SDA state changes during SCL HIGH are re-  
served for indicating start and stop conditions. Refer to  
Figures 1 and 2.  
Figure 1. Data Validity  
SCL  
SDA  
DATA STABLE  
DATA  
CHANGE  
3849 FHD F06  
Figure 2. Definition of Start and Stop  
SCL  
SDA  
START BIT  
STOP BIT  
3849 FHD F07  
3
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