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参数资料
| 型号： | CLRC63201T |
| 厂商： | NXP Semiconductors N.V. |
| 元件分类： | 通信及网络 |
| 英文描述： | Multiple protocol contactless reader IC (MIFARE-I-CODE1) |
| 封装： | CLRC63201T/0FE<SOT287-1 (SO32)|<<http://www.nxp.com/packages/SOT287-1.html<1<week 5, 2005,; |
| 文件页数： | 58/126页 |
| 文件大小： | 719K |
| 代理商： | CLRC63201T |
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CLRC632_35
NXP B.V. 2009. All rights reserved.
Product data sheet
PUBLIC
Rev. 3.5 — 10 November 2009
073935
37 of 126
NXP Semiconductors
CLRC632
Multiple protocol contactless reader IC (MIFARE/I-CODE1)
9.10.2.3
Correlation circuitry
The correlation circuitry calculates the degree of matching between the received and an
expected signal. The output is a measure of the amplitude of the expected signal in the
received signal. This is done for both, the Q and I-channels. The correlator provides two
outputs for each of the two input channels, resulting in a total of four output signals.
The correlation circuitry needs the phase information for the incoming card signal for
optimum performance. This information is dened for the microprocessor using the
BitPhase register. This value denes the phase relationship between the transmitter and
receiver clock in multiples of the BitPhase time (tBitPhase)=1/ 13.56 MHz.
9.10.2.4
Evaluation and digitizer circuitry
The correlation results are evaluated for each bit-half of the Manchester coded signal. The
evaluation and digitizer circuit decides from the signal strengths of both bit-halves, if the
current bit is valid
If the bit is valid, its value is identied
If the bit is not valid, it is checked to identify if it contains a bit-collision
Select the following levels for optimal using RxThreshold register bits:
MinLevel[3:0]: denes the minimum signal strength of the stronger bit-halve’s signal
which is considered valid.
CollLevel[3:0]: denes the minimum signal strength relative to the amplitude of the
stronger half-bit that has to be exceeded by the weaker half-bit of the Manchester
coded signal to generate a bit-collision. If the signal’s strength is below this value,
logic 1 and logic 0 can be determined unequivocally.
After data transmission, the card is not allowed to send its response before a preset time
period which is called the frame guard time in the ISO/IEC 14443 standard. The length of
this time period is set using the RxWait register’s RxWait[7:0] bits. The RxWait register
denes when the receiver is switched on after data transmission to the card in multiples of
one bit duration.
If bit RcvClkSelI is set to logic 1, the I-clock is used to clock the correlator and evaluation
circuits. If bit RcvClkSelI is set to logic 0, the Q-clock is used.
Remark: It is recommended to use the Q-clock.
9.11 Serial signal switch
The CLRC632 comprises two main blocks:
digital circuitry: comprising the state machines, encoder and decoder logic etc.
analog circuitry: comprising the modulator, antenna drivers, receiver and
amplication circuitry
The interface between these two blocks can be congured so that the interface signals are
routed to pins MFIN and MFOUT. This makes it possible to connect the analog part of one
CLRC632 to the digital part of another device.
The serial signal switch can be used to measure MIFARE and ISO/IEC 14443 A as well as
related I-CODE1 and ISO/IEC 15693 signals.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CLRC63201T/0FE | 制造商:NXP Semiconductors 功能描述: |
| CLRC63201T/0FE,112 | 功能描述:RFID应答器 I.CODE HS READER RoHS:否 制造商:Murata 存储容量:512 bit 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel |
| CLRC63201T/0FE,118 | 制造商:NXP Semiconductors 功能描述:Interface Misc |
| CLRC63201T/0FE112 | 制造商:NXP Semiconductors 功能描述:CNTCLESS RC 5V ISO14443 + ISO15693 |
| CLRC663 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Contactless reader IC |
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