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EM4223V2WS11 参数 Datasheet PDF下载

EM4223V2WS11图片预览
型号: EM4223V2WS11
PDF下载: 下载PDF文件 查看货源
内容描述: 只读超高频射频识别设备 [Read-only UHF Radio Frequency Identification Device]
分类和应用: 射频
文件页数/大小: 29 页 / 426 K
品牌: EMMICRO [ EM MICROELECTRONIC - MARIN SA ]
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R
EM4223  
number of successful reads, the round size should be  
increased. As the proportion of white space increases in  
proportion to the number of successful reads the round  
size should be decreased.  
Use of the round_size function (ISO & FST modes)  
To optimized the system for the Transponder population  
size, the Reader is able to send round size commands to  
the  
Transponder  
by  
way  
of  
INIT_ROUND,  
INIT_ROUND_ALL, BEGIN_ROUND, NEW_ROUND and  
WAKE_UP_FST commands. The Reader needs to  
determine the proportion of collisions occurring and the  
amount of white space occurring and accordingly adjust  
the round size. As collisions increase proportional to the  
The round size is coded in the INIT_ROUND,  
INIT_ROUND_ALL, BEGIN_ROUND, NEW_ROUND and  
WAKE_UP_FST commands using 3 bits according to  
Table20.  
Value  
Bit coding  
Round Size  
MSB  
0 0 0  
0 0 1  
0 1 0  
0 1 1  
1 0 0  
1 0 1  
1 1 0  
1 1 1  
LSB  
'0'  
1
'1'  
'2'  
'3'  
'4'  
'5'  
'6'  
'7'  
8
16  
32  
64  
128  
256  
RFU  
Table20 - Round size coding  
27  
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Copyright © 2005, EM Microelectronic-Marin SA  
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