EM4056B6CB2RC 데이터 시트보기 (PDF) - EM Microelectronic - MARIN SA

부품명

상세내역

일치하는 목록

EM4056B6CB2RC

2KBIT Read/Write with ANTICOLLISION Contactless Identification Device

EM Microelectronic - MARIN SA 

EM4056

Continue command

After receiving the BitVal frame from the different transponders in the field the reader decides whether the tags with « 0 » or

« 1 » should continue the arbitration process and communicates this with the Continue frame. The transponders whose last

BitVal was not identical with the confirmation in the Continue frame stop the arbitration process and wait for a new

command.

Arbitration in progress

Reader

Transponder

1 bit

Start

2 bits

MSB

Continue

ta1p

6 bits

Bit0 Bit0 X X Bit1 Bit1

nth BitVal

ta2p

1 bit 2 bits

MSB

Start Continue

ta1p

6 bits

Bit0 Bit0 X X Bit1 Bit1

n+1th BitVal

Fig. 19

When the Continue frame of the 32nd bit is processed, only one transponder is left. This new identified tag sets the RdEn bit

to 1 and belongs no longer to the active group. The arbitration cycle is completed by a transponder frame for selective

commands (RdEn,CRC). The CRC is calculated like a transponder frame for general commands. This means the CRC is

calculated over ROM and RdEn of the transponder in order to increase the reliability of the arbitration.

End of arbitration

Reader

Transponder

1 bit

Start

2 bits

MSB

Continue

ta1p

6 bits

Bit0 Bit0 X X Bit1 Bit1

32th BitVal

1 bit 2 bits

MSB

Start Continue

8 bits

MSB

ta2p

ta1p CRC

Fig. 20

To identify the address of a transponder, it takes 115 ms (including overhead as mentioned before). That makes it possible

to detect about 8.7 new transponders per second, independent of the number of transponders in the electromagnetic field.

Copyright © 2005, EM Microelectronic-Marin SA

11

www.emmicroelectronic.com

Share Link: