JP2630071B2 - Data transmission / reception method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a data transmission / reception system between a plurality of processors. In particular, it relates to a data transmission / reception system for analog data.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing a conventional data transmission / reception system.

Conventionally, when sending analog data from one processor to another processor, as shown in FIG. 2, for example, when handling five pieces of analog data,
The data sending side holds the output of the digital-to-analog converter circuit 12 via the 5-port multiplexer 13A, and the data receiving side controls the 5-port multiplexer 23A to input analog data to the analog-to-digital converter circuit 22, and the processor 21A Had been reading the value.

[0004]

However, in such a conventional data transmission / reception system, the number of multiplexer ports, sample-and-hold circuits and communication lines is required by the number of data to be handled, and the configuration is large when handling a large amount of data. There were disadvantages.

SUMMARY OF THE INVENTION An object of the present invention is to provide a data transmission / reception system which can reduce the number of lines and circuits around an interface such as a multiplexer and a sample hold circuit.

[0006]

The present invention comprises a transmitting device and a receiving device, wherein the transmitting device outputs a plurality of channels of digital data, and an output of the transmitting processor. A transmission-side conversion circuit for converting a signal into analog data, and transmission means for transmitting an output signal of the transmission-side conversion circuit to a reception side, wherein the reception-side apparatus receives a plurality of channels of analog data from the transmission-side apparatus. At least two communication lines in a data transmission / reception system including: a receiving unit that receives the digital data; a receiving conversion circuit that converts an output signal of the receiving device into digital data; and a receiving processor that inputs the converted digital data. Wherein the transmitting processor includes means for adding the identification information to the digital data of each channel and outputting the digital data. The transmitting means outputs the analog data value of each channel of the transmitting side conversion circuit to one of the two communication lines, and outputs the identification information of the output analog data to the other one. Wherein the receiving processor includes means for determining data of a corresponding channel based on the output identification information.

In the present invention, the identification information may be a voltage value indicating data of each channel.

[0008]

According to the present invention, at least two communication lines are provided. The transmitting means outputs the value of the analog data of each channel of the transmitting side conversion circuit to one of the two communication lines, and outputs the identification information of the output analog data to the other one. The receiving processor determines the data of the corresponding channel based on the output identification information and supplies the data to the receiving conversion circuit.

The identification information may be a voltage value indicating data of each channel.

As described above, it is possible to reduce circuits around the interface such as the multiplexer and the sample hold circuit and the number of lines.

[0011]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1A is a block diagram of a data transmission / reception system according to an embodiment of the present invention.

Referring to FIG. 1A, the data transmission / reception system includes a transmitting device 10 and a receiving device 20. The transmitting device 10 includes a processor 11 as a transmitting processor for outputting digital data of a plurality of channels. A digital-to-analog conversion circuit 12 as a transmission-side conversion circuit for converting digital data of a plurality of channels from the processor 11 into analog data; a multiplexer 13 and a sample-and-hold as transmission means for transmitting an output signal of the digital-to-analog conversion circuit 12 to a reception side. Circuit 14 and a receiving device 20
A multiplexer 23 as receiving means for receiving a plurality of channels of analog data from the transmitting device 10, an analog-to-digital conversion circuit 22 as a receiving conversion circuit for converting the output signal of the multiplexer 23 into digital data,
A processor 21 is included as a receiving processor that inputs the converted digital data.

Here, the feature of the present invention is that the processor 11 includes at least two communication lines 31 and 32, the processor 11 includes means for adding identification information to digital data of each channel and outputting the digital data, and the multiplexer 13 includes The analog data value of each channel of the digital-to-analog conversion circuit 12 is output to the communication line 31 (channel 1) via the sample and hold circuit 14, and the identification information of the output analog data is output to the communication line 32 (channel 2). Including means for outputting,
The processor 21 includes means for determining data of a corresponding channel based on the output identification information.

The identification information is a voltage value (data identification voltage) indicating data of each channel.

The operation of the data transmission / reception system having such a configuration will be described. FIG. 1B is a diagram showing a relationship between data of the data transmission / reception system of the present invention and a data identification voltage. It is assumed that data to be transmitted from the processor 11 to the processor 21 is data 1 to data 5 as shown in the table.
When data 1 is transmitted from the processor 11, first, a data identification voltage 0.5 V is transmitted to the multiplexer 13 via the digital-to-analog conversion circuit 12, and the sample-and-hold circuit 14 of the channel 2 holds the voltage value. After that, the data 1 is converted into a digital-to-analog conversion circuit 12.
And to multiplexer 1 via multiplexer 13 and
The value of data 1 is held by the sample hold circuit 14.

On the other hand, the processor 21 on the receiving side analyzes the received data in the following procedure. First, the data identification voltage sent to the channel 2 is read, and the voltage is set to 0 to 1
V, 1-2V, 2-3V, 3-4V, and 4-5V are determined. Thereafter, the data transmitted to the channel 1 is read. When a voltage of 0.5 V is transmitted to the channel 2, it is understood that the voltage value transmitted to the channel 1 is data 1.

Similarly, for data 2, the processor
Then, 1.5 V is transmitted as a data identification voltage from channel 11 to channel 2 and data 2 is transmitted to channel 1. The processor 21 knows that the voltage value sent to the channel 1 is data 2 because the data identification voltage is in the range of 1-2 V. Hereinafter, the same applies to data 3 to 5.

[0018]

As described above, the present invention has an excellent effect of reducing the number of circuits and circuits around an interface such as a multiplexer and a sample-and-hold circuit.

[Brief description of the drawings]

FIG. 1A is a block diagram of a data transmission / reception system according to an embodiment of the present invention.

FIG. 1B is a diagram showing a relationship between data and a data identification voltage in the data transmission / reception system of the present invention.

FIG. 2 is a block diagram of a conventional data transmission / reception system.

[Explanation of symbols]

 10,10A Transmitter 11,11A, 21,21A Processor 12 Digital-to-analog converter 13,13A, 23,23A Multiplexer 14,14A Sample and hold circuit 20,20A Receiver 22 Analog-to-digital converter 31,32 Communication line

Claims (2)

(57) [Claims] 1. A transmitting device comprising: a transmitting device; and a receiving device, wherein the transmitting device outputs digital data of a plurality of channels, and a transmitting device that converts an output signal of the transmitting processor into analog data. Side conversion circuit,
Transmitting means for transmitting an output signal of the transmitting side conversion circuit to a receiving side; the receiving side apparatus receiving means for receiving analog data of a plurality of channels from the transmitting side apparatus; and an output signal of the receiving means. In a data transmission / reception system including a receiving side conversion circuit for converting the digital data into digital data, and a receiving side processor for inputting the converted digital data, at least two communication lines are provided. The transmitting means outputs the analog data value of each channel of the transmitting side conversion circuit to one of the two communication lines, and outputs the output. Means for outputting the identification information of the analog data to another one, wherein the receiving processor responds based on the output identification information. Data transmitting and receiving method characterized by comprising means for determining the data for that channel. 2. The data transmission / reception system according to claim 1, wherein said identification information is a voltage value indicating data of each of said channels.