CN204178383U - Two interfaces read-write terminal integrated circuit and read-write terminal - Google Patents

Abstract

The utility model relates to a dual-interface read-write terminal integrated circuit. The integrated circuit includes: a basic circuit module, which is used to provide the same part of the circuit in the independent contact-type read-write terminal integrated circuit and the independent contactless read-write terminal integrated circuit; a contact circuit module, which is used to provide the independent Circuits other than the circuits in the basic circuit module of the contact-type read-write terminal integrated circuit; non-contact circuit modules, used to provide the independent contactless read-write terminal integrated circuit except for the circuits in the basic circuit module Other circuits; the basic circuit module, the contact circuit module and the non-contact circuit module are integrated in a single integrated circuit. The utility model can improve the integration degree of the read-write terminal and reduce the volume and cost of the read-write terminal.

Description

Dual-interface read-write terminal integrated circuit and read-write terminal

technical field

The utility model relates to the field of smart cards, in particular to a dual-interface read-write terminal integrated circuit and a read-write terminal.

Background technique

Dual-interface read-write terminal system-level chip (System on a Chip, referred to as: SoC) ASIC products are the key components of various read-write terminals such as the third-generation Ukey, POS machine, etc., integrating microelectronics technology and computer technology, With high reliability, safety and flexibility, it not only provides services for the convenience of personal life, but also plays a great role in promoting the development of the national information security industry.

In practical applications, the most important feature of the read-write terminal is portability and compactness. In order to reduce the size of the read-write terminal as much as possible, it is necessary to purchase a read-write terminal integrated circuit with a small package size and high integration. In the existing technology, the contact read-write terminal and the non-contact read-write terminal are independent integrated circuits, and the dual-interface read-write terminal is the integration of the main controller integrated circuit with various modules and the contact read-write terminal. Circuits, non-contact read-write terminal integrated circuits and related human-machine interfaces are integrated on the same printed circuit board (Printed Circuit Board, referred to as: PCB). As shown in Figure 1, it is a schematic structural diagram of a dual-interface read-write terminal with both contact and non-contact read-write functions in the prior art, including: a main controller integrated circuit 11, a display screen 12, a keyboard 13, a contact read-write terminal Write terminal integrated circuit 14, IC card slot 15, non-contact read-write terminal integrated circuit 16, antenna and matching network 17, crystal oscillator 18, power supply 19, display screen 12, keyboard 13, contact read-write terminal integrated circuit 14, The non-contact read-write terminal integrated circuit 16 is connected with the main controller integrated circuit 11 respectively, the IC card slot 15 is connected with the contact-type read-write terminal integrated circuit 14, the antenna and the matching network 17 are connected with the non-contact read-write terminal integrated circuit 16 Connected, the crystal oscillator 18 is connected with the contact type read-write terminal integrated circuit 14, the non-contact type read-write terminal integrated circuit 16 respectively, the power supply 19 is connected with the main controller integrated circuit 11, the display screen 12, the keyboard 13, the contact type read-write terminal The integrated circuit 14, the IC card slot 15, the non-contact read-write terminal integrated circuit 16, the antenna, the matching network 17, and the crystal oscillator 18 are all connected. In FIG. 1 , the integrated circuit 14 of the contact read-write terminal and the integrated circuit 16 of the non-contact read-write terminal need to be integrated respectively.

As shown in Figure 2, it is a schematic structural diagram of a contact-type read-write terminal integrated circuit in the prior art, which is divided into an analog circuit 21 and a digital circuit 22, wherein the analog circuit 21 includes: a crystal start-up circuit 211 for communicating with the crystal oscillator 18 Cooperate with the work to generate the highest frequency clock source for the read-write terminal; the interface circuit 212 generates the contact signal specified by the communication protocol to ensure normal communication between the terminal and the IC card; the short-circuit overcurrent detection circuit 213 detects the current and current of each contact Voltage, monitor whether short circuit, excessive current and other abnormalities occur, if any abnormality occurs, the read-write terminal integrated circuit will automatically release the contact, and send a relevant interrupt signal to notify the main control integrated circuit of the read-write terminal to process in time; the detection unit 214 includes a temperature detection circuit 2141 and a voltage detection circuit 2142, wherein the temperature detection circuit 2141 is used to detect the ambient temperature in real time, and when the temperature is too high or too low, the main control integrated circuit is notified to respond in time through an alarm, thereby protecting the chip from being damaged , the voltage detection circuit 2142 is used to detect the voltage of the power supply 19 in real time, and once the voltage is lower than the threshold, an alarm signal is given to inform the user; the low-voltage linear voltage regulator 215 includes an analog low-dropout linear voltage regulator 2151 and a digital low-dropout linear voltage regulator Among them, the analog low-dropout linear regulator 2151 converts the input power fluctuating within a certain range into a fixed voltage used by the analog circuit part, which requires high power supply rejection ratio (PowerSupply Rejection Ratio, referred to as: PSRR) and low output noise , The digital low-dropout linear regulator 2152 converts the input power fluctuating within a certain range into a fixed voltage used by the digital circuit part, requiring good transient response, and the requirements for PSRR and noise are higher than those of the analog low-dropout linear regulator 2151 low; the voltage reference circuit 216 provides a voltage reference and a current reference for the integrated circuit. The digital circuit 22 includes: a clock generation circuit 221, which divides the clock provided by the crystal and supplies it to each digital module; a contact-type read-write terminal controller 222, which activates, resets and releases the IC card according to the communication protocol. Receive the data returned by the IC card, and send data information that meets the requirements of the communication protocol to the IC card; the interrupt controller 223 manages various interrupt signals generated by the read-write terminal, and generates hardware interrupt signals; the power management circuit 224 controls the entire read-write terminal. Power-on, sleep and power-off of the write terminal; register and communication interface 225, the register stores various configuration information of the circuit and the operating status of the circuit, through the standard communication interface, the register can be accessed to realize the main controller of the read-write terminal Information interaction between the integrated circuit and the dual-interface read-write terminal integrated circuit. Wherein, the voltage detection circuit 2142 and the voltage reference circuit 216 are connected to the power supply 19 respectively, the interface circuit 212 is connected to the IC card slot 15, the clock generation circuit 221 is connected to the crystal starting circuit 211, and the contact type read-write terminal controller 222 is connected to the interface circuit 212 connected, the short-circuit overcurrent detection circuit 213, the temperature detection circuit 2141, and the voltage detection circuit 2142 are respectively connected to the interrupt controller 223, and the analog low-dropout linear voltage regulator 2151 and the digital low-dropout linear voltage regulator 2152 are respectively connected to the voltage reference circuit 216 Connected, the analog low-dropout linear regulator 2151 is connected to the crystal start-up circuit 211, the interface circuit 212, the short-circuit overcurrent detection circuit 213, the temperature detection circuit 2141, and the voltage detection circuit 2142, and the digital low-dropout linear regulator 2152 is connected to the digital circuit All circuit parts in the part 22 are connected, the contact type read-write terminal controller 222 is connected with the interrupt controller 223, the register and the communication interface 225 respectively, and the interrupt controller 223, the register and the communication interface 225 are respectively connected with the main controller integrated circuit 11 .

As shown in Figure 3, it is a schematic structural diagram of a contactless read-write terminal integrated circuit in the prior art, which is also divided into an analog circuit 21 and a digital circuit 22, wherein the analog circuit 21 includes: a power amplifier 31 for amplifying radio frequency signals Output, drive the antenna; RF front-end 32, a series of processing of low noise amplification, frequency mixing, and band-pass filtering are performed on the signal received from the antenna, and the RF signal is converted into a baseband signal; analog-to-digital conversion circuit 33: quantize the analog input and discretization processing, the analog signal is converted into a digital signal; in addition, it also includes: a crystal starting circuit 211, a detection unit 214, a low dropout linear voltage regulator 215, a voltage reference circuit 216, wherein the detection unit 214 includes a temperature detection circuit 2141 and The voltage detection circuit 2142 and the low dropout linear regulator 215 include an analog low dropout linear regulator 2151 and a digital low dropout linear regulator 2152 . The digital circuit 22 includes: a non-contact read-write terminal controller 34, which is used to decode and deframe the demodulated data stream, extract the valid data returned by the IC card, and store the data into the on-chip memory for the terminal The main controller integrated circuit for reading and writing reads, and communicates with the IC card by adjusting the output power of the power amplifier 31 when sending data; the demodulation circuit 35 recovers the data to be decoded by demodulating the quantized baseband signal In addition, it also includes: a clock generation circuit 221 , an interrupt controller 223 , a power management circuit 224 , a register and a communication interface 225 . Among them, the voltage detection circuit 2142 and the voltage reference circuit 216 are respectively connected to the power supply 19, the power amplifier 31 and the radio frequency front end 32 are respectively connected to the antenna and the matching network 17, the clock generation circuit 221 is connected to the crystal starting circuit 211, and the non-contact read-write terminal The controller 34 is connected to the power amplifier 31, the analog-to-digital converter 33 is connected to the radio frequency front end 32, the temperature detection circuit 2141 and the voltage detection circuit 2142 are connected to the interrupt controller 223 respectively, the analog low dropout linear regulator 2151, the digital low dropout linear regulator 2151 The voltage regulator 2152 is connected to the voltage reference circuit 216 respectively, and the analog low-dropout linear voltage regulator 2151 is connected to the crystal startup circuit 211, the power amplifier 31, the radio frequency front end 32, the analog-to-digital converter 33, the temperature detection circuit 2141, and the voltage detection circuit 2142. The digital low-dropout linear regulator 2152 is connected to each circuit part in the digital circuit 22, and the non-contact read-write terminal controller 34 is connected to the demodulation circuit 35, the interrupt controller 223, the register and the communication interface 225 respectively, and the interrupt The controller 223 , the register and the communication interface 225 are respectively connected to the main controller integrated circuit 11 .

Since the integrated circuit of the contact read-write terminal and the integrated circuit of the non-contact read-write terminal are two independent integrated circuits, and each integrated circuit has multiple circuit modules, the cost of the read-write terminal is high and the volume is relatively large. big.

Utility model content

The utility model provides a dual-interface read-write terminal integrated circuit and a read-write terminal, which are used to improve the integration degree of the read-write terminal and reduce the volume and cost of the read-write terminal.

The utility model provides a dual-interface read-write terminal integrated circuit, comprising:

The basic circuit module is used to provide the same part of the circuit in the independent contact read-write terminal integrated circuit and the independent contactless read-write terminal integrated circuit;

A contact circuit module, used to provide circuits other than the circuits in the basic circuit module for the independent contact read-write terminal integrated circuit;

A non-contact circuit module, used to provide circuits other than the circuits in the basic circuit module for the independent non-contact read-write terminal integrated circuit;

The basic circuit module, the contact circuit module and the non-contact circuit module are integrated into a single integrated circuit.

The utility model also provides a read-write terminal, including the aforementioned dual-interface read-write terminal integrated circuit, a peripheral circuit and a power supply, and the peripheral circuit is used for information interaction with the dual-interface read-write terminal integrated circuit.

The utility model integrates the integrated circuit of the contact read-write terminal and the integrated circuit of the non-contact read-write terminal into one integrated circuit, and realizes sharing the same part of the circuit in the integrated circuit of the contact read-write terminal and the integrated circuit of the non-contact read-write terminal , improving the integration of the read-write terminal.

Description of drawings

Fig. 1 is a schematic structural diagram of a dual-interface read-write terminal with both contact and non-contact read-write functions in the prior art;

FIG. 2 is a schematic structural diagram of a contact-type read-write terminal integrated circuit in the prior art;

FIG. 3 is a schematic structural diagram of a non-contact read-write terminal integrated circuit in the prior art;

Fig. 4 is a schematic structural diagram of an embodiment of a dual-interface read-write terminal integrated circuit embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an embodiment of a read-write terminal of the present invention.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

It can be seen from the aforementioned Figures 2 and 3 that the integrated circuit of the contact read-write terminal and the integrated circuit of the non-contact read-write terminal contain the same circuit part, so it can be Write the same part of the circuit in the terminal integrated circuit, realize the integration of the two into one integrated circuit, improve the integration of the read-write terminal and reduce the cost.

As shown in Figure 4, it is a schematic structural diagram of an embodiment of a dual-interface read-write terminal integrated circuit of the present invention. The dual-interface read-write terminal integrated circuit may include: a basic circuit module 41, a contact circuit module 42, a non-contact circuit Module 43, the contact circuit module 42 is connected to the basic circuit module 41, and the non-contact circuit module 43 is connected to the basic circuit module 41, wherein the basic circuit module 41, the contact circuit module 42, and the non-contact circuit module 43 can include The analog circuit 21 and the digital circuit 22, in addition, the basic circuit module 41 is connected with the main controller integrated circuit 11, the contact circuit module 42 is connected with the IC card slot 15, and the non-contact circuit module 43 is connected with the antenna and the matching network 17.

In this embodiment, the basic circuit module 41 is used to provide the same part of the circuit in the independent contact-type read-write terminal integrated circuit and the independent contactless read-write terminal integrated circuit; the contact circuit module 42 is used to provide independent contact read-write terminal integrated circuit except the circuit in the basic circuit module; the non-contact circuit module 43 is used to provide an independent non-contact read-write terminal integrated circuit except the circuit in the basic circuit module; the above-mentioned basic circuit The module 41, the contact circuit module 42 and the contactless circuit module 43 are integrated in a single integrated circuit.

In this embodiment, two originally independent contact-type read-write terminal integrated circuits and contactless read-write terminal integrated circuits are integrated into one dual-interface read-write terminal integrated circuit, and the same Part of the circuits are shared in the basic circuit module 41, which improves the integration of the read-write terminal and reduces the volume and cost of the read-write terminal.

Optionally, in this embodiment, it may further include: a main controller integrated circuit 11 integrated in the above-mentioned dual-interface read-write terminal integrated circuit.

Optionally, referring to the schematic diagram shown in FIG. 4 , the basic circuit module 41 may include: a crystal startup circuit 211, a detection unit 214, a low dropout linear voltage regulator 215, a voltage reference circuit 216, a clock generation circuit 221, and an interrupt controller 223 , register and communication interface 225, power management circuit 224, crystal start-up circuit 211 is connected with crystal oscillator 18, detection unit 214 and voltage reference circuit 216 are connected with power supply 19 respectively, low dropout linear regulator 215 and voltage reference circuit 216 Connected, the interrupt controller 223 is connected with the detection unit 214, the register and the communication interface 225 are connected with the main controller integrated circuit 11; the low dropout linear voltage regulator 215 is used to provide power for the dual-interface read-write terminal integrated circuit, and the clock generation circuit 221 It is used to process the clock provided by the crystal startup circuit 211.

Optionally, referring to the schematic diagram shown in FIG. 4 again, the contact circuit module 42 may include: a short circuit overcurrent detection circuit 213, a contact read-write terminal controller 222, an interface circuit 212, and the interface circuit 212 is connected to the IC card slot 15 , the interrupt controller 223 is connected to the short-circuit overcurrent detection circuit 213, the contact read-write terminal controller 222 is connected to the interface circuit 212, the interrupt controller 223 is connected to the contact read-write terminal controller 222, and the contact read-write terminal controller Connect with register and communication interface.

Optionally, referring to the schematic diagram shown in FIG. 4 again, the non-contact circuit module 43 includes: a radio frequency front end 31, a power amplifier 32, an analog-to-digital conversion circuit 33, a demodulation circuit 35, a non-contact read-write terminal controller 34, a radio frequency The front end 31 and the power amplifier 32 are connected to the antenna and the matching network 17, the analog-to-digital conversion circuit 33 is connected to the radio frequency front-end 31, the demodulation circuit 35 is connected to the analog-to-digital conversion circuit 33, and the non-contact read-write terminal controller 34 is connected to the demodulation circuit 35, the power amplifier 32 is connected with the non-contact read-write terminal controller 34, the non-contact read-write terminal controller is connected with the interrupt controller, and the non-contact read-write terminal controller is connected with the register and the communication interface.

Optionally, referring to the schematic diagram shown in FIG. 4 again, the detection unit 214 includes: a voltage detection circuit 2142, a temperature detection circuit 2141, the voltage detection circuit 2142 is connected to the power supply 19, the interrupt controller 223 is connected to the voltage detection circuit 2142, and the temperature detection circuit 2141 connected separately.

Optionally, referring to the schematic diagram shown in FIG. 4 again, the low-dropout linear regulator 215 includes: an analog low-dropout linear regulator 2151, a digital low-dropout linear regulator 2152, an analog low-dropout linear regulator 2151 and a digital low-dropout linear regulator 2151. Differential linear regulator 2152 is connected with voltage reference circuit 216 respectively, crystal starter 211, voltage detection circuit 2142, temperature detection circuit 2141, short circuit overcurrent detection circuit 213, interface circuit 212, radio frequency front end 31, power amplifier 32, modulus The conversion circuit 33 is respectively connected with the analog low-dropout linear voltage regulator 2151, and the digital low-dropout linear voltage regulator 2152 is connected with each circuit part of the digital circuit 22 in the dual-interface read-write terminal integrated circuit.

Optionally, in this embodiment, the dual-interface read-write terminal integrated circuit supports the ISO/ISE 7816 protocol and the ISO/ISE 14443 protocol.

As shown in Figure 5, it is a structural schematic diagram of an embodiment of a read-write terminal of the present invention. The read-write terminal may include a dual-interface read-write terminal integrated circuit 51, a peripheral circuit 52 and a power supply 19, and the peripheral circuit 52 and the dual-interface read-write terminal The terminal integrated circuit 51 is connected, the power supply 19 is connected with the dual-interface read-write terminal integrated circuit 51 and the peripheral circuit 52 , and the peripheral circuit 52 is used for information exchange with the dual-interface read-write terminal integrated circuit 51 . The dual-interface read-write terminal integrated circuit 51 may include any module in the foregoing embodiments, which will not be repeated here.

In this embodiment, the dual-interface read-write terminal integrated circuit 51 performs information interaction with the peripheral circuit 52, realizing the function of the read-write terminal and improving the integration of the read-write terminal.

Optionally, referring to the schematic diagram shown in FIG. 5 again, the peripheral circuit 52 may include: a main controller integrated circuit 11, a display screen 12, a keyboard 13, an IC card slot 15, an antenna and a matching network 17, a crystal oscillator 18, a dual The interface read-write terminal integrated circuit 51, the display screen 12, the keyboard 13 are respectively connected with the main controller integrated circuit 11, the IC card slot 15, the antenna and the matching network 17, the crystal oscillator 18 are respectively connected with the dual-interface read-write terminal integrated circuit 51 connected.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements shall be made to the technical solutions without departing from the spirit and scope of the technical solutions of the present utility model.

Claims (9)

1. A dual-interface read-write terminal integrated circuit, characterized in that, comprising: The basic circuit module is used to provide the same part of the circuit in the independent contact read-write terminal integrated circuit and the independent contactless read-write terminal integrated circuit; A contact circuit module, used to provide circuits other than the circuits in the basic circuit module for the independent contact read-write terminal integrated circuit; A non-contact circuit module, used to provide circuits other than the circuits in the basic circuit module for the independent non-contact read-write terminal integrated circuit; The basic circuit module, the contact circuit module and the non-contact circuit module are integrated into a single integrated circuit. 2. The integrated circuit according to claim 1, further comprising: a main controller integrated circuit integrated in the dual-interface read-write terminal integrated circuit. 3. The integrated circuit according to claim 1, wherein the basic circuit module comprises: a crystal startup circuit, a detection unit, a low-dropout linear voltage regulator, a voltage reference circuit, a clock generation circuit, an interrupt controller, a register and a communication interface and a power management circuit, the crystal starting circuit is connected to a crystal oscillator, the detection unit and the voltage reference circuit are respectively connected to a power supply, and the low dropout linear regulator is connected to the voltage reference circuit , the interrupt controller is connected to the detection unit, the register and the communication interface are connected to the main controller integrated circuit; the low dropout linear voltage regulator is used to provide power for the dual-interface read-write terminal integrated circuit, so The clock generating circuit is used for processing the clock provided by the crystal starting circuit. 4. The integrated circuit according to claim 3, wherein the contact circuit module comprises: a short circuit overcurrent detection circuit, a contact read-write terminal controller, an interface circuit, and the interface circuit is connected to an external IC card The interrupt controller is connected to the short-circuit overcurrent detection circuit, the contact-type read-write terminal controller is connected to the interface circuit, and the interrupt controller is connected to the contact-type read-write terminal controller , the contact-type read-write terminal controller is connected to the register and the communication interface. 5. The integrated circuit according to claim 3, wherein the non-contact circuit module comprises: a radio frequency front end, a power amplifier, an analog-to-digital conversion circuit, a demodulation circuit, a non-contact read-write terminal controller, the The radio frequency front-end and the power amplifier are connected to an external antenna and a matching network, the analog-to-digital conversion circuit is connected to the radio-frequency front-end, the demodulation circuit is connected to the analog-to-digital conversion circuit, and the non-contact read-write The terminal controller is connected to the demodulation circuit, the power amplifier is connected to the non-contact read-write terminal controller, the non-contact read-write terminal controller is connected to the interrupt controller, and the contactless A read-write terminal controller is connected with the register and the communication interface. 6. The integrated circuit according to claim 3, wherein the detection unit comprises: a voltage detection circuit and a temperature detection circuit, the voltage detection circuit is connected to the power supply, the interrupt controller is connected to the voltage The detection circuit and the temperature detection circuit are respectively connected. 7. The integrated circuit according to claim 1, wherein the dual-interface read-write terminal integrated circuit supports the ISO/ISE 7816 protocol and the ISO/ISE 14443 protocol. 8. A read-write terminal, comprising the dual-interface read-write terminal integrated circuit, peripheral circuit and power supply described in any one of claims 1-7, the peripheral circuit is used to carry out information with the dual-interface read-write terminal integrated circuit interact. 9. The read-write terminal according to claim 8, wherein the peripheral circuit comprises: a main controller integrated circuit, a display screen, a keyboard, an IC card slot, an antenna, a matching network, and a crystal oscillator.