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參數(shù)資料
| 型號： | EM4022V12WS11 |
| 英文描述： | 6A Dual Synchronous Buck Regulator with Integrated MOSFETs; Temperature Range: -40°C to 85°C; Package: 50-QFN |
| 中文描述： | 模擬雜項 |
| 文件頁數(shù)： | 15/15頁 |
| 文件大?。?/td> | 277K |
| 代理商： | EM4022V12WS11 |
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
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| EM4022V13WS11 | 制造商:EMMICRO 制造商全稱:EM Microelectronic - MARIN SA 功能描述:Multi Frequency Contactless Identification Device Anti-Collision compatible with BTG Supertag Category Protocols |
| EM4022V14WS11 | 制造商:EMMICRO 制造商全稱:EM Microelectronic - MARIN SA 功能描述:Multi Frequency Contactless Identification Device Anti-Collision compatible with BTG Supertag Category Protocols |
| EM4022V15WS11 | 制造商:EMMICRO 制造商全稱:EM Microelectronic - MARIN SA 功能描述:Multi Frequency Contactless Identification Device Anti-Collision compatible with BTG Supertag Category Protocols |
| EM4022V16WS11 | 制造商:EMMICRO 制造商全稱:EM Microelectronic - MARIN SA 功能描述:Multi Frequency Contactless Identification Device Anti-Collision compatible with BTG Supertag Category Protocols |
| EM4022V17WS11 | 制造商:EMMICRO 制造商全稱:EM Microelectronic - MARIN SA 功能描述:Multi Frequency Contactless Identification Device Anti-Collision compatible with BTG Supertag Category Protocols |
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