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參數(shù)資料
| 型號： | M34559G6FP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP52 |
| 封裝： | 10 X 10 MM, 0.65 MM PITCH, PLASTIC, LQFP-52 |
| 文件頁數(shù)： | 19/93頁 |
| 文件大?。?/td> | 1810K |
| 代理商： | M34559G6FP |
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CLRC663
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Preliminary data sheet
COMPANY PUBLIC
Rev. 3.1 — 26 September 2011
171131
115 of 126
NXP Semiconductors
CLRC663
Contactless reader IC
A multi-layer board is recommended to implement a low pass filter as shown in the circuit
above. The low pass filter consists of the components L0 and C0. The recommended
values are given in the above mentioned application notes.
Remark: To achieve best performance all components shall have at least the quality of
the recommended ones.
Remark: The layout has a major influence on the overall performance of the filter.
23.1.2 Antenna matching
Due to the impedance transformation of the given low pass filter, the antenna coil has to
be matched to a certain impedance. The matching elements C1 and C2 can be estimated
and have to be fine tuned depending on the design of the antenna coil.
The correct impedance matching is important to provide the optimum performance. The
overall quality factor has to be considered to guarantee a proper ISO/IEC 14443
communication scheme. Environmental influences have to considered as well as common
EMC design rules.
For details refer to the above mentioned application notes.
Remark: Do not exceed the current limits ITVDD, otherwise the chip might be destroyed.
Remark: The overall 13.56 MHz RFID proximity antenna design with the CLRC663 chip is
straight forward and doesn’t require a special RF-know how. However, all relevant
parameters have to be considered to guarantee an overall optimum performance together
with international EMC compliance.
23.1.3 Receiving circuit
The internal receiving concept of the CLRC663 makes use both side-bands of the
sub-carrier load modulation of the card response via a differential receiving concept
(RXP,RXN). No external filtering is required.
It is recommended to use the internally generated VMID potential as the input potential of
pin RX. This DC voltage level of VMID has to be coupled to the Rx-pins via R2 and R4. To
provide a stable DC reference voltage capacitances C4, C6 has to be connected between
VMID and ground. Refer to Figure 36
Considering the (AC) voltage limits at the Rx-pins the AC voltage divider of R1 + C3 and
R2 as well as R3 + C5 and R4 has to be designed. Depending on the antenna coil design
and the impedance matching the voltage at the antenna coil varies from antenna design to
antenna design. Therefore the recommended way to design the receiving circuit is to use
the given values for R1(= R3), R2 (= R4), and C3 (= C5) from the above mentioned
application note, and adjust the voltage at the RX-pins by varying R1(= R3) within the
given limits.
Remark: R2 and R4 are AC-wise connected to ground (via C4 and C6).
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M34559G6-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M3455AG8FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M3455AG8-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M3455AGCFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M3455AGC-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
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