 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
EM4022V15WS11 Datasheet(PDF) 9 Page - EM Microelectronic - MARIN SA |
|
||||||||||||||||||||||||||||||
EM4022V15WS11 Datasheet(HTML) 9 Page - EM Microelectronic - MARIN SA |
|
|
9 / 15 page  Copyright 2002, EM Microelectronic-Marin SA 9 www.emmicroelectronic.com EM4022 Control ROM Bit definition Parameter Value Mode Fast / Normal Mode 0 1 Normal Fast Free-running 0 GAP detection enabled 1 GAP disabled (Free-running) ACK mode 0 Slow-down 1 Switch-off Maximum 0 0 (Continuous) initial random 1 16 bits delay 2 64 bits 3 256 bits 41 kbits 54 kbits 6 16 kbits 7 64 kbits Data rate 0 64 kbit/s 1 32 kbit/s 2 16 kbit/s 3 8 kbit/s 4 4 kbit/s 5 2 kbit/s 6 1 kbit/s 7 0.5 kbit/s Encoding 0 Glitch encoding method 1 Manchester encoding GAP type 0 Low frequency GAP detection 1 High frequency GAP detection Anti-collision Protocol Overview The protocols are a collection of simple but fast and reliable anti-collision protocols. They allow fast reading of large numbers of transponders simultaneously using a single reader. It is even possible to identify transponders with identical codes, thereby making it possible to count identical items. Free-running protocol The basis of the BTG-Supertag series of protocols is that transponders transmit their own codes at random times to a reader. By just listening and recording unique codes when they are received, the reader can eventually detect every tag. The reader detects collisions by typically checking a CRC. This basic protocol is known as the “Free-running” protocol. It requires uniquely coded tags. Its main advantage is that the reader design is simple, and the spectrum requirement is much less – a very narrow band is required. Figure 10 shows a sequence of three transponders. The reader starts first to read transponder 1 but during his data transmission, transponder 3 starts to modulate. In this case, due to the CRC check no transponder is detected. A transponder is taken into account, if it transmits a complete data stream without any disturbance Control ROM Map 15 14 13 12 11 10 987 654321 0 Byte[1] Byte[0] HF GAP Man- chester Data rate Random delay Switch- off Free- running Fast |
Similar Part No. - EM4022V15WS11 |
|
Similar Description - EM4022V15WS11 |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
