CN210895470U - NFC multichannel read write line - Google Patents
NFC multichannel read write line Download PDFInfo
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- CN210895470U CN210895470U CN201922501086.7U CN201922501086U CN210895470U CN 210895470 U CN210895470 U CN 210895470U CN 201922501086 U CN201922501086 U CN 201922501086U CN 210895470 U CN210895470 U CN 210895470U
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- binding post
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Abstract
The utility model discloses a NFC multichannel reader-writer, including the master control circuit board and connect in the multiunit NFC circuit subassembly of master control circuit board, be provided with MCU main control unit, power and multiunit binding post on the master control circuit board, MCU main control unit and multiunit binding post are connected to the power, MCU main control unit connects the multiunit respectively through SPI serial bus binding post, the quantity of binding post is unanimous with the quantity of NFC circuit subassembly, and every group binding post corresponds with NFC circuit subassembly and is connected; the beneficial effects are that: the utility model provides a MCU main control unit that NFC multichannel read write line set up connects multiunit binding post through SPI serial bus simultaneously, connects NFC circuit assembly through multiunit binding post one-to-one respectively, has realized multichannel NFC and has read; each independent NFC circuit component is in wired connection with the main control circuit board through a flat cable, so that the NFC circuit components can keep a longer distance from the main control circuit board, and the NFC circuit component is convenient to use.
Description
Technical Field
The utility model relates to a wireless communication equipment technical field, concretely relates to NFC multichannel read write line.
Background
Near Field Communication (NFC) is an emerging Near Field Communication technology, and devices using the NFC technology can exchange data when they are close to each other, and are integrated and evolved from a non-contact Radio Frequency Identification (RFID) and an interconnection technology, and integrate functions of an inductive reader/writer, an inductive card, and point-to-point Communication on a single chip.
Existing NFC readers are generally schemes that use double pole double throw relays to switch between multiple NFC antennas: because the antenna needs to be polled continuously, the relay needs to be opened and closed frequently, the service life of the relay is greatly reduced, and the NFC antenna cannot be too far away from the mainboard; therefore, the scheme of switching among the multiple NFC antennas by using the radio frequency switch solves the problem of the service life of the relay, but the NFC antennas cannot be far away from the mainboard, otherwise, communication is difficult, and the use is inconvenient.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a NFC multichannel read write line to solve the problem that appears among the above-mentioned background art.
In order to solve the technical problem, the utility model discloses a technical scheme does: the utility model provides a NFC multichannel read write line, include the master control circuit board with connect in the multiunit NFC circuit subassembly of master control circuit board, be provided with MCU main control unit, power and multiunit binding post on the master control circuit board, MCU main control unit and multiunit binding post are connected to the power, the multiunit is connected respectively through SPI serial bus to the MCU main control unit binding post, binding post's quantity is unanimous with NFC circuit subassembly's quantity.
As the preferred embodiment of the present invention, the SPI serial bus comprises a clock pin CLK, an input pin MISO, and an output pin MOSI.
As the preferred scheme of the utility model, binding post and circuit assembly's quantity is thirty.
As the preferred embodiment of the present invention, the NFC circuit component is composed of an NFC chip, a connection terminal, and an onboard antenna.
As the utility model discloses an optimal scheme, the multiunit binding post that sets up on the main control circuit board is the array and arranges.
The beneficial effect of adopting above-mentioned technical scheme is: the utility model provides a MCU main control unit that NFC multichannel read write line set up connects multiunit binding post through SPI serial bus simultaneously, connects NFC circuit assembly through multiunit binding post one-to-one respectively, has realized multichannel NFC and has read; each independent NFC circuit component is in wired connection with the main control circuit board through a flat cable, so that the NFC circuit components can keep a longer distance from the main control circuit board, and the NFC circuit component is convenient to use.
Drawings
Fig. 1 is a connection block diagram of the present invention;
fig. 2 is a schematic structural diagram of the main control circuit board of the present invention;
fig. 3 is a circuit array diagram of thirty wiring terminal arrangements according to the present invention;
fig. 4 is a schematic circuit diagram of the connection terminal of the present invention;
fig. 5 is a schematic circuit diagram of the MCU master control unit of the present invention;
fig. 6 is a schematic circuit diagram of the power supply of the present invention;
fig. 7 is a schematic circuit diagram of the NFC chip of the present invention.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
According to fig. 1, this embodiment provides an NFC multichannel reader, include master control circuit board and connect in the multiunit NFC circuit subassembly of master control circuit board, be provided with MCU main control unit, power and multiunit binding post on the master control circuit board, MCU main control unit and multiunit binding post are connected to the power, MCU main control unit connects multiunit binding post respectively through SPI serial bus, binding post's quantity is unanimous with NFC circuit subassembly's quantity. The MCU is connected to all the connection terminals through a SPI serial bus, and an independent chip selection pin NSS-1 and NSS-2 … NSS-N is distributed to each connection terminal. The MCU master control unit selects the NFC channel by pulling down the chip selection pin NSS, and the unselected NFC channel does not respond to the command sent by the MCU master control unit. The card reading process comprises the following steps: selecting NFC channel 1- > reading channel 1 card- > selecting NFC channel 2- > reading channel 2 card- > … … - > selecting NFC channel N- > reading channel N card, and re-selecting NFC channel 1- > reading channel 1 card …, and circulating fast in the way to achieve the effect of simultaneous reading. The power supply is responsible for supplying power to the MCU main control unit and supplying power to the NFC circuit assembly through the wiring terminal.
The SPI serial bus includes a clock pin CLK, an input pin MISO, and an output pin MOSI.
As shown in fig. 3, in order to maintain a good reading effect of the reader/writer, it is preferable to set the number of the connection terminals and the number of the circuit components to thirty.
The NFC circuit component consists of an NFC chip, a wiring terminal and an on-board antenna. The connecting terminal is used for being connected with the connecting terminal on the main control circuit board through a flat cable, so that the NFC chip is connected with the MCU main control unit.
In order to facilitate the arrangement of the lines connected by the plurality of sets of connection terminals, the plurality of sets of connection terminals disposed on the main control circuit board are preferably arranged in an array.
The utility model has the advantages as follows: one SPI serial bus is connected with a plurality of NFC chips and connected through a flat cable, so that multi-channel NFC reading is realized; the wiring terminals can be added or deleted according to actual conditions, so that various communication requirements are met; each independent NFC chip is connected with the main control circuit board through a flat cable, and the distance between the NFC chip and the main control circuit board can reach 10 meters, and a good communication function can be kept; each channel is provided with an independent NFC chip, each NFC chip is further provided with an independent induction coil for matching, and the card reading effect is better.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (5)
1. The utility model provides a NFC multichannel read write line, its characterized in that, including master control circuit board with connect in the multiunit NFC circuit subassembly of master control circuit board, be provided with MCU main control unit, power and multiunit binding post on the master control circuit board, MCU main control unit and multiunit binding post are connected to the power, MCU main control unit passes through SPI serial bus and connects the multiunit respectively binding post, binding post's quantity is unanimous with NFC circuit subassembly's quantity, and every group binding post corresponds with NFC circuit subassembly and is connected.
2. The NFC multi-way reader of claim 1, wherein the SPI serial bus comprises a clock pin CLK, an input pin MISO, and an output pin MOSI.
3. The NFC multi-way reader of claim 1, wherein the number of terminals and circuit components is thirty.
4. The NFC multi-way reader according to claim 1, wherein the NFC circuit component is composed of one NFC chip, one connection terminal, and one on-board antenna.
5. The NFC multi-way reader-writer according to claim 1, wherein the plurality of sets of connection terminals provided on the main control circuit board are arranged in an array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922501086.7U CN210895470U (en) | 2019-12-31 | 2019-12-31 | NFC multichannel read write line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922501086.7U CN210895470U (en) | 2019-12-31 | 2019-12-31 | NFC multichannel read write line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210895470U true CN210895470U (en) | 2020-06-30 |
Family
ID=71319480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922501086.7U Active CN210895470U (en) | 2019-12-31 | 2019-12-31 | NFC multichannel read write line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210895470U (en) |
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2019
- 2019-12-31 CN CN201922501086.7U patent/CN210895470U/en active Active
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