CN219085466U

CN219085466U - RKE AES128 encrypted data transmitting circuit

Info

Publication number: CN219085466U
Application number: CN202223551568.1U
Authority: CN
Inventors: 陈明艳; 古秋翔; 徐飞飞; 邱玺
Original assignee: Chengdu Innosilicon Co ltd
Current assignee: Chengdu Innosilicon Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-26
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses an RKE AES128 encrypted data transmitting circuit, which comprises a radio frequency transmitter RF-SI4010-C2, a 3 pin of the radio frequency transmitter RF-SI4010-C2 is connected with one end of a capacitor C8 and one end of an inductor L1, a 4 pin of the radio frequency transmitter RF-SI4010-C2 is connected with the other end of the capacitor C8, one end of the inductor L2 and one end of the capacitor C2, the other end of the capacitor C2 is grounded, the other end of the inductor L1 and the other end of the inductor L2 are both connected with a power supply, two ends of the capacitor C7 are respectively connected with two ends of the capacitor C8 through printed antennas, and at least one GPIO pin of the radio frequency transmitter RF-SI4010-C2 is connected with a key. The utility model is realized by adopting a radio frequency transmitter RF-SI4010-C2, does not need an external clock, has a low power consumption mode, and can transmit the transmission data in an encryption mode of AES128, wherein the transmission intensity reaches-6 dBm.

Description

RKE AES128 encrypted data transmitting circuit

Technical Field

The utility model relates to the technical field of electronics, in particular to an RKE AES128 encrypted data transmitting circuit.

Background

RKE (Remote Keyless Entry) is a short for remote access control system/remote door opening and closing. The RKE system allows a user to lock or unlock a door of a vehicle using a transmitter on a key fob that transmits data into the vehicle, and the user presses a button switch on the key fob to trigger the system to operate. Besides the technology RKE for opening the car brake, it also has an anti-theft effect. The RKE system consists of a receiving controller mounted on the car and a transmitter carried by the user, i.e. a wireless remote control car door key.

AEK is an algorithm encryption key, AEK with 128 bits of AES128 is an algorithm encryption key, and 128 bits of data comprise 32 bits of ID information, 8 bits of key value information, 8 bits of serial number, 8 bits of battery power information and 8 bits of CRC (cyclic redundancy check) code; 64bit 0 DATA 8-DATA 15 DATA. The RKE system transmit data is transmitted by encrypted means of AES 128. Thus, the wireless fob of the RKE system requires a transmitting circuit to implement.

SI4010 is a first system level automatic antenna tuning transmitter with proprietary tuning circuitry that automatically fine-tunes the antenna for optimum performance and constant output power consumption. Manufacturing tolerances and environmental changes of the PCB loop antenna will cause variations in the transmit frequency, which may lead to reduced antenna efficiency and wasted power. The antenna tuning circuit of the SI4010 continuously achieves self-induction matching with the antenna by adjusting a variable capacitor on one piece, forms resonance and improves the efficiency. SI4010 supports edge rate control for programmable on-off keying (OOK) mode to reduce harmonic scattering, conforming to national radio related regulations. The scheme is superior to other discrete device schemes, can reach the output power of +10dBm, and has excellent frequency range and perfect link. The low power consumption characteristic of SI4010 greatly prolongs the service life of the remote controller battery. The power supply is very suitable for button battery power supply application, the power supply voltage is 1.8-3.6V, the current loss is very low (less than 10nA standby current and less than 20mA peak current), and the wake-on-touch power consumption is very low. Many remote controls are used for a short period of time each day and are in standby mode for a long period of time before the user presses a key. And the detection key in the standby mode is a wake-on-touch GPIO (general purpose input/output) port, so that no current loss can be realized. SI4010 has built in an 8051 compatible MCU core, 4kB RAM,8kB nonvolatile memory for One Time Programming (OTP), 128bit EEPROM and 12kB ROM for the repository functions. These ROM-based functions enable developers to easily implement complex capabilities, such as secure encryption of remote controls through authenticated code, reduce risk, and reduce development time. The digital peripheral of the on-chip MCU includes a wake-on-touch general purpose I/O port (GPIO), a proprietary 20bit EEPROM counter, support millions of read and write cycles, an LED drive, a sleep timer, a debugger, a high-speed 128bit Advanced Encryption Standard (AES) accelerator to protect unidirectional links.

Disclosure of Invention

The utility model aims to provide an RKE AES128 encrypted data transmitting circuit which is realized by adopting a radio frequency transmitter RF-SI4010-C2, does not need an external clock, has a low power consumption mode, and can transmit transmitted data in an AES128 encrypted mode, wherein the transmitting intensity reaches-6 dBm.

In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:

the utility model discloses an RKE AES128 encrypted data transmitting circuit which comprises a radio frequency transmitter RF-SI4010-C2, wherein 3 pins of the radio frequency transmitter RF-SI4010-C2 are connected with one end of a capacitor C8 and one end of an inductor L1, 4 pins of the radio frequency transmitter RF-SI4010-C2 are connected with the other end of the capacitor C8, one end of the inductor L2 and one end of the capacitor C2, the other end of the capacitor C2 is grounded, the other end of the inductor L1 and the other end of the inductor L2 are both connected with a power supply, two ends of the capacitor C7 are respectively connected with two ends of the capacitor C8 through printed antennas, and at least one GPIO pin of the radio frequency transmitter RF-SI4010-C2 is connected with a key.

Further, one end of the capacitor C8 is connected to one end of the capacitor C1, the other end of the capacitor C8 is connected to one end of the capacitor C2, and both the other end of the capacitor C1 and the other end of the capacitor C2 are grounded.

Further, the 8, 9 and 10 pins of the RF transmitter RF-SI4010-C2 are respectively connected with keys.

Preferably, the 5 pin of the RF-SI4010-C2 is connected with a 3.3V DC power supply, and a filter capacitor is arranged between the 3.3V DC power supply and the ground.

Further preferably, the filter capacitor includes 4 capacitors C3, C4, C5, C6 connected in parallel.

Further, the 6 pins of the RF transmitter RF-SI4010-C2 are connected with the cathode of the light emitting diode, the anode of the light emitting diode is connected with one end of the 0 ohm resistor R1, and the other end of the 0 ohm resistor R1 is connected with a 3.3V direct current power supply.

Preferably, the 3.3V dc power supply is provided by a battery.

Preferably, the 8 pins of the RF transmitter RF-SI4010-C2 are connected with one end of the key S2, the 9 pins of the RF transmitter RF-SI4010-C2 are connected with one end of the key S1, the 8 pins of the RF transmitter RF-SI4010-C2 are connected with one end of the key S0, and the other end of the key S0, the other end of the key S1 and the other end of the key S2 are grounded.

The beneficial effects of the utility model are as follows:

1. the present utility model transmits the transmission data by means of encryption of AES 128.

2. The utility model does not need an external clock, has a low power consumption mode, and has the emission intensity reaching-6 dBm.

3. The utility model has strong anti-interference capability and high working reliability.

Drawings

Fig. 1 is a schematic circuit diagram of the present utility model.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present utility model more apparent.

Example 1

The embodiment discloses a RKE AES128 encrypted data transmitting circuit, specifically as shown in fig. 1:

the RF-SI electronic device comprises a radio frequency transmitter RF-SI4010-C2, wherein 3 pins of the radio frequency transmitter RF-SI4010-C2 are connected with one end of a capacitor C8 and one end of an inductor L1, 4 pins of the radio frequency transmitter RF-SI4010-C2 are connected with the other end of the capacitor C8, one end of the inductor L2 and one end of the capacitor C2, the other end of the capacitor C2 is grounded, the other end of the inductor L1 and the other end of the inductor L2 are both connected with a power supply, two ends of the capacitor C7 are respectively connected with two ends of the capacitor C8 through printed antennas, and at least one GPIO pin of the radio frequency transmitter RF-SI4010-C2 is connected with a key. One end of the capacitor C8 is connected with one end of the capacitor C1, the other end of the capacitor C8 is connected with one end of the capacitor C2, and the other end of the capacitor C1 and the other end of the capacitor C2 are grounded. The 5 pin of the RF-SI4010-C2 is connected with a 3.3V direct current power supply, and a filter capacitor is arranged between the 3.3V direct current power supply and the ground. The 6 pins of the RF-SI4010-C2 are connected with the cathode of the light emitting diode, the anode of the light emitting diode is connected with one end of the 0 ohm resistor R1, and the other end of the 0 ohm resistor R1 is connected with the 3.3V DC power supply +3V. The 3.3V dc power +3v3 is supplied from the battery BT 1.

The RF-SI4010-C2 has embedded CIP-518051 single chip microcomputer, does not need external clock, has low power consumption mode, and transmits the transmission data by AES128 encryption mode, with transmission intensity up to-6 dBm.

The working frequency of the embodiment is 433.92Mhz plus or minus 150KHz; the remote control distance is more than or equal to 30m.

Example 2

This embodiment differs from embodiment 1 in that: the filter capacitor of this embodiment is implemented by using 4 capacitors C3, C4, C5, C6 connected in parallel. The filter capacitor is formed by a plurality of capacitors with smaller nominal capacity and volume.

Other portions of this embodiment are the same as those of embodiment 1, and thus are not described in detail.

Example 3

On the basis of

embodiment

1 or 2, the embodiment discloses a specific connection mode of the key as follows:

the 8 pins of the radio frequency transmitter RF-SI4010-C2 are connected with one end of the key S2, the 9 pins of the radio frequency transmitter RF-SI4010-C2 are connected with one end of the key S1, the 8 pins of the radio frequency transmitter RF-SI4010-C2 are connected with one end of the key S0, and the other end of the key S0, the other end of the key S1 and the other end of the key S2 are grounded.

In a specific application, the key S0 is defined as an unlocking key, the key S2 is defined as a locking key, the key S2 is defined as a car searching key, and the key functions are realized by programming through the radio frequency transmitter RF-SI4010-C2 so as to meet the operation and use of a car lock key.

The functional test is as follows:

unlocking key, -6.73dBm; locking key, -6.85dBm; vehicle searching key-6.18 dBm;

other portions of this embodiment are the same as those of

embodiment

1 or 2, and thus are not described in detail.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Of course, the present utility model is capable of other various embodiments and its several details are capable of modification and variation in light of the present utility model by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

An rke aes128 encrypted data transmission circuit, characterized in that: the RF-SI electronic device comprises a radio frequency transmitter RF-SI4010-C2, wherein a 3 pin of the radio frequency transmitter RF-SI4010-C2 is connected with one end of a capacitor C8 and one end of an inductor L1, a 4 pin of the radio frequency transmitter RF-SI4010-C2 is connected with the other end of the capacitor C8, one end of the inductor L2 and one end of the capacitor C2, the other end of the capacitor C2 is grounded, the other end of the inductor L1 and the other end of the inductor L2 are both connected with a power supply, two ends of the capacitor C7 are respectively connected with two ends of the capacitor C8 through a printed antenna, and at least one GPIO pin of the radio frequency transmitter RF-SI4010-C2 is connected with a key.
2. The RKE AES128 encrypted data transmission circuit according to claim 1, wherein: one end of the capacitor C8 is connected with one end of the capacitor C1, the other end of the capacitor C8 is connected with one end of the capacitor C2, and the other end of the capacitor C1 and the other end of the capacitor C2 are grounded.
3. The RKE AES128 encrypted data transmission circuit according to claim 1, wherein: and the 8, 9 and 10 pins of the RF transmitter RF-SI4010-C2 are respectively connected with keys.
4. The RKE AES128 encrypted data transmission circuit according to claim 1, wherein: the 6 pins of the RF transmitter RF-SI4010-C2 are connected with the cathode of the light emitting diode, the anode of the light emitting diode is connected with one end of a 0 ohm resistor R1, and the other end of the 0 ohm resistor R1 is connected with a 3.3V direct current power supply.
5. The RKE AES128 encrypted data transmission circuit according to claim 4, wherein: and a 5 pin of the RF transmitter RF-SI4010-C2 is connected with a 3.3V direct current power supply, and a filter capacitor is arranged between the 3.3V direct current power supply and the ground.
6. The RKE AES128 encrypted data transmission circuit according to claim 5, wherein: the filter capacitor comprises 4 capacitors C3, C4, C5 and C6 which are connected in parallel.
7. The RKE AES128 encrypted data transmission circuit according to claim 5, wherein: the 3.3V dc power supply is provided by a battery.
8. The RKE AES128 encrypted data transmission circuit according to claim 3, wherein: the 8 pins of the RF transmitter RF-SI4010-C2 are connected with one end of the key S2, the 9 pins of the RF transmitter RF-SI4010-C2 are connected with one end of the key S1, the 8 pins of the RF transmitter RF-SI4010-C2 are connected with one end of the key S0, and the other end of the key S0, the other end of the key S1 and the other end of the key S2 are grounded.