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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  
Return link preamble  
The FM0 return link preamble has the bit pattern described in Error! Reference source not found.  
Tag bit periods  
2
3
4
5
6
7
8
11 12  
14  
16  
1
9
10  
13  
15  
Preamble waveform  
'1' is tag reflecting, '0' is tag not reflecting  
Fig. 15 - FM0 Return link preamble  
Cyclic Redundancy Check (CRC)  
The 16 bit CRC is calculated on all data bits up to, but  
not including, the first CRC bit.  
The 16-bit register is preloaded with 'FFFF’. The resulting  
CRC value is inverted, attached to the end of the packet  
and transmitted.  
The polynomial used to calculate the CRC is x^16 + x^12  
+ x^5 + 1.  
The most significant byte shall be transmitted first. The  
most significant bit of each byte shall be transmitted first.  
MSByte  
LSByte  
LSB  
MSB  
LSB  
MSB  
CRC 16 (8 bits)  
first transmitted bit of the CRC  
CRC 16 (8 bits)  
Fig. 16- CRC format  
7. MEMORY ORGANISATION AND CONFIGURATION INFORMATION  
Memory Map  
Unambiguous User Data (UUD) & SUID  
The physical memory comprises 128 bits of user  
memory, 8 bits AFI and 3 personality bits. In addition, the  
IC Manufacturer Code as specified in ISO7816-6/AM1 is  
hard-wired into the Transponder.  
The user memory on the Transponder comprises 128  
bits of user specified data. This data is known as  
Unambiguous User Data UUD, because it is expected  
that this data be unique and unambiguous. The UUD is a  
license plate defined by the user and may be an EPC™,  
GTAG™ or other user defined number.  
128 bits UUD memory  
8 bit AFI  
3 bits Personality  
The Transponder will return a Sub-UID (SUID) as defined  
in ISO 18000-6 when the SUID flag is =1 in the  
arbitration initiation commands. The SUID in this  
Transponder is derived from the least significant 32 bits  
of the UUD as described below. The SUID consists of 40  
bits: the 8 bit manufacturer code followed by the least  
significant 32 bits of the UUD.  
Fig. 17- Memory map  
19  
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Copyright © 2005, EM Microelectronic-Marin SA  
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