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參數(shù)資料
| 型號： | EM4223V8WW11E |
| 廠商： | EM Microelectronic |
| 英文描述： | Read-only UHF Radio Frequency Identification Device |
| 中文描述： | 只讀超高頻射頻識別設(shè)備 |
| 文件頁數(shù)： | 27/29頁 |
| 文件大小： | 437K |
| 代理商： | EM4223V8WW11E |
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R
EM4223
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
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
Copyright
2005, EM Microelectronic-Marin SA
27
www.emmicroelectronic.com
way
of
INIT_ROUND,
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.
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
74H74H
Table20
.
Bit coding
Value
MSB LSB
Round Size
'0'
0 0 0
1
'1'
0 0 1
8
'2'
0 1 0
16
'3'
0 1 1
32
'4'
1 0 0
64
'5'
1 0 1
128
'6'
1 1 0
256
'7'
1 1 1
RFU
Table20 - Round size coding
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| EM4223V8WW7 | 制造商:EMMICRO 制造商全稱:EM Microelectronic - MARIN SA 功能描述:Read-only UHF Radio Frequency Identification Device |
| EM4223V8WW7E | 制造商:EMMICRO 制造商全稱:EM Microelectronic - MARIN SA 功能描述:Read-only UHF Radio Frequency Identification Device |
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