- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄376180 > MLX90111 (Electronic Theatre Controls, Inc.) 128bit Read Write Transponder PDF資料下載
參數(shù)資料
| 型號(hào)： | MLX90111 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 128bit Read Write Transponder |
| 中文描述： | 128位讀寫(xiě)應(yīng)答 |
| 文件頁(yè)數(shù)： | 8/12頁(yè) |
| 文件大?。?/td> | 148K |
| 代理商： | MLX90111 |
MLX90111
128bit Read Write Transponder
MLX90111 128bit Read Write Transponder
Page 8 of 12
Rev 1.12 5-Feb-01
3 Timing specification
3.1 Asynchronous Control Pattern
The Asynchronous Control Pattern (ACP) is sent
by the reader to render the transponder silent
(stop transmitting), and listen for a programming
sequence.
Before starting the ACP, the field must be stable
at FHIGH for at least 5 bit periods (Tsetup). This
guarantees
that
the
FTHRESHOLD is adjusted.
The control pattern itself contains 4 transitions
between high field FHIGH and low field FLOW,
each of which should be 2.5bitperiods apart.
The threshold level FTHRESHOLD adjusts itself
exponentially to the average FHIGH over the last
20 periods (TCLK).
The optimum modulation depth forced by the
reader depends on the application and stretches
between:
90%> (FHIGH-FLOW) / (FHIGH+FLOW) > 20%
The transponder samples the field 2 times per
bit. A first time is after the first quarter, the
second time after the third quarter. The sample
values are only retained when the modulation
resistor is off. The other samples are dropped.
reference
level
3.2 Synchronous Command
When the ACP has been detected, the
transponder modulation will be turned off, within
maximum 6 bit periods after the last rising edge
of the ACP. The transponder will now
synchronize on the first falling edge it sees. This
edge is generated by a startbit (SB=0), which
has to be sent within a Timeout Window TWD.
If no SB is detected the transponder will return to
its original read mode.
The
SB
may
used
synchronization between tag and reader.
Tip: always try to put the sampling time of the
transponder at the end of the first half bit. This
minimizes the influence of an increased the
transponder Q at larger distance.
However, if the modulated signal on the
transponder takes several periods to drop, the
SB may be extended with this time. This will
shift the sampling moment forward.
After this synchronisation step, a synchronous
command can be sent from the base station.
Make sure to respect the nr of transponder
clocks per bit, as specified below.
All data sent by the reader have to be Return-
To-One encoded.
to
optimize
the
3.3 Transponder action
The command is verified on its Parity and CRC
values after the full command has been
received.
If verification is successful the command will be
executed during the next 32 bit periods.
Else if no valid command is received, due to a
verification
error,
the
immediately, i.e. 32 bit periods after the SB, start
modulating its 128bit ID code.
transponder
will
3.3 Multiple commands
After successfully receiving a command, the
transponder will wait for a new command. This
new timeout window (TWD) starts after the 32 bit
period it requires to execute the received
command.
To limit time skew between microcontroller and
the transponder, a new synchronization is done
before each new command.
The transponder will start modulating its ID code
approximately 52 btiperiods after successfully
having received its last command.
3.4 Other timings
See timing table below for an overview of all
timings. All timings are bitperiod based, and are
therefore related to the resonance frequency
and datarate.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MLX90217 | Hall-Effect Cam Sensor |
| MLX90240 | Pressure Sensor IC |
| MLX90242LUA-CC03 | Linear Hall Effect Sensor |
| MLX90242LVA-CC03 | Linear Hall Effect Sensor |
| MLX90242_04 | Linear Hall Effect Sensor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MLX90121 | 制造商:MELEXIS 制造商全稱(chēng):Melexis Microelectronic Systems 功能描述:13.56MHz RFID Transceiver |
| MLX90121EF | 制造商:Melexis Semiconductors 功能描述:MLX90121 Series 2.7 to 5.5 V 13.56 MHz Surface Mount RFID Transceiver - SSOP-20 |
| MLX90121EFR-DAA-000-RE | 功能描述:IC RFID TXRX 13.56MHZ 20-SSOP RoHS:是 類(lèi)別:RF/IF 和 RFID >> RFID IC 系列:MLX90121 其它有關(guān)文件:CR14 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:- RF 型:收發(fā)器 頻率:13.56MHz 特點(diǎn):ISO14443-B 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SO 包裝:Digi-Reel® 其它名稱(chēng):497-5719-6 |
| MLX90121EFR-DAA-000-TU | 制造商:Melexis Semiconductors 功能描述:IC TXRX RFID 13.56MHZ 20SSOP 制造商:Melexis Semiconductors 功能描述:MLX90121 Series 2.7 to 5.5 V 13.56 MHz Surface Mount RFID Transceiver - SSOP-20 |
| MLX90129 | 制造商:MELEXIS 制造商全稱(chēng):Melexis Microelectronic Systems 功能描述:13,56MHz Wireless Sensor Tag |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。