JPH03121629A - Radio equipment - Google Patents

Abstract

PURPOSE:To set freely a frequency of an object radio wave with compatibility by providing a memory storing a data specifying the frequency of the radio wave set from an external device to a radio equipment. CONSTITUTION:A memory such as a radio frequency register 4 or the like to latch a data for setting a radio wave frequency is provided. Thus, A data specifying a radio wave frequency to set a desired transmission/reception frequency is easily inputted to a memory from an external device 2 and a CPU 1 references a data specifying the frequency of a radio wave stored in the memory to calculate the transmission/reception frequency data and the transmission/reception frequency is set from the transmission/reception frequency data by a PLL(phase locked loop) circuit 5 and the transmission/reception of the radio wave of a desired frequency is attained. Thus, the compatible radio equipment is obtained, in which an object radio wave frequency is able to be set.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wireless device having the function of transmitting or receiving data wirelessly.

[Summary of the invention]

In order to make it possible to set the frequency of radio waves emitted and received by a wireless device from an external device through an interface circuit, memory such as a radio frequency register that holds data specifying the frequency of radio waves set by the external device is set up wirelessly. Provided in the device.

[Conventional technology]

For example, FCC's 47 CFI? Part 90(P
rivate LandMobile Radio 5
services), the frequency of radio waves for wireless devices is set to 7.
One type of frequency is available, and a wireless device is only allowed to use the frequencies permitted for that wireless device.

Therefore, in conventional wireless devices, in order to perform wireless communication at the permitted radio wave frequency, the oscillator is set by writing information for specifying the radio wave frequency into the ROM or by setting it using a hardware method such as a bit switch. was under control.

Alternatively, the frequency of the oscillator itself was fixed by hardware such as an oscillator.

[Problem to be solved by the invention]

Conventional methods not only result in each wireless device being a different device, but also increase the manufacturing process, increase costs, complicate manufacturing management, and reduce reliability and maintainability due to the following reasons. It was the cause.

When setting data in ROM, different data must be written to each ROM. And is the written data confirmed after assembling the device? 2, separate measures must be taken to do so.

In the case of setting by a switch, if the amount of information to be set is large, the device becomes large. It is also necessary to take measures to prevent setting errors and to prevent accidents where settings are inadvertently changed.

In order to fix the frequency of the oscillator, 71 types of parts must be prepared.

SUMMARY OF THE INVENTION In order to solve the above-mentioned drawbacks, it is an object of the present invention to provide wireless devices that are compatible with each other and that can set a target radio wave frequency.

[Means to solve the problem]

In order to solve the above problems, the present invention provides a memory such as a radio frequency register for holding data that defines the frequency of radio waves, and has a configuration in which data can be set in the memory such as the radio frequency register from an external device. .

[Effect]

In the wireless device configured as described above, the data specifying the radio wave frequency for setting the desired transmission/reception frequency can be easily input into the memory from an external device, and the CPU can input the data specifying the radio wave frequency held in the memory into the memory. Calculate frequency data for transmitting/receiving with reference to data specifying the frequency, and use the PLL circuit to calculate transmitting/receiving frequency data from the frequency data for transmitting/receiving 13.
The receiving frequency can be set, and radio waves of a desired frequency can be transmitted and received.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a wireless device according to the present invention.

The wireless device according to the present invention has an interface between a radio frequency register 4 that stores data that specifies radio wave transmission/reception frequencies, and an external W 712 for inputting the data that specifies the radio wave transmission/reception (3 frequencies). a circuit 3, a modem 6 that modulates the transmitted/received data, a PLL circuit 5 that superimposes the transmitted data on the transmitted radio frequency signal, and a CPUI.
, a radio oscillation circuit 7, a radio reception circuit 8, and an antenna 9
It is composed of.

Here, the interface circuit 3 includes wired, electromagnetic induction,
It is a circuit that communicates with the external device 2 using light or the like, and may also include a CPU separate from the CPUI.

Next, regarding the operation of the wireless device of the present invention, FIGS.
This will be explained based on the flowchart shown in the figure.

First, the case of transmitting radio waves will be explained.

The wireless device of the present invention is connected to an external device 2 via an interface circuit 3, and the external device 2 transfers and stores data specifying the radio wave transmission frequency to a radio frequency register 4 via the interface circuit 3 and CPUI. has been done.

CPLJ1 refers to the data defining the transmission frequency stored in the radio frequency register 4, calculates the frequency data for transmission (201), and sets the frequency data for transmission in the PLL circuit 5 (202).

PLL time Fa5 sets the transmission frequency from the transmission frequency data (203) and is locked (204).

Next, the CPU 2 attempts to transfer the send data δ to the modem 6.
05), the transmission data is modulated by the modem 6 (206
) is input to the PLL circuit 5.

The PLL circuit 5 superimposes the transmission data on the transmission frequency signal (207), sends the obtained transmission signal to the radio reception circuit 7, amplifies it (208), and then transmits it as a radio wave from the antenna 9.

Next, the case of receiving radio waves will be explained.

The wireless device of the present invention is connected to an external device 2 via an interface circuit 3, and the external device 2 transfers data specifying the receiving frequency of radio waves to a radio frequency register 4 in advance via the interface circuit 3 and CPUI. , is remembered.

The CPU t calculates reception frequency data by referring to the data defining the reception frequency stored in the radio frequency register 4 (301), and sets the reception frequency data in the PLL circuit 5 (302).

PLI, the circuit 5 sets the reception frequency from the reception frequency data (303), and is input (304>).

The radio waves received by the antenna 9 are amplified by the radio reception circuit 8, dropped to an intermediate frequency by the reception frequency, and detected (305).

The detected wave data is demodulated by the modem 6 (
307), the data is processed by the CPUI (308),
Reception ends.

In this way, the wireless device of the present invention has a radio frequency register 4.
The data specifying the transmission/reception frequency from the external device 2 is stored in advance in the radio frequency register 4, and the transmission/reception is performed at the desired transmission/reception frequency set from the data. be.

Here, the radio frequency register only needs to be capable of writing and reading data, and a register, latch RAM, etc. can be used.

Furthermore, although this embodiment describes a transmitting/receiving wireless device, a transmitting-only or receiving-only wireless device having only one of a wireless transmitting circuit and a wireless receiving circuit can also be used.
It goes without saying that the present invention is applicable.

〔Effect of the invention〕

As explained above, the present invention provides mutual compatibility by providing a wireless device with a memory such as a radio frequency register for holding data specifying the frequency and number of radio waves set from an external device. In addition, the wireless H7t allows you to freely set the desired radio wave frequency, and is compliant with FCC's 47 CFR Part 90 (Private Land).
It has the advantage that it can be easily adapted to applications such as Mobile Radio 5 services).

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the wireless device according to the present invention, FIG. 2 is a flowchart illustrating an example of transmission and operation of the wireless device according to the present invention, and FIG. 3 is a receiving operation of the wireless device according to the present invention. It is a flow chart explaining an example. ■ 4 ・ ・ 6 ・ 7 ・ ・ ・ CPU ・Interface circuit ・Radio frequency register PLL circuit ・Radio transmitter circuit ・Radio receiver circuit and above

Claims (1)

[Claims] At least one of a radio transmitting circuit or a radio receiving circuit, a PLL (phase locked loop) circuit that supplies a high frequency signal to the radio transmitting circuit or the radio receiving circuit, and controlling the PLL circuit. CPU and the CPU
A wireless device including an interface circuit that provides a communication interface between the external device and the external device, the wireless device comprising a memory that holds data that specifies the frequency of a high-frequency signal input from the external device, and that the data held in the memory is A wireless device characterized in that the frequency of a high-frequency signal is set based on the frequency of a high-frequency signal.