JPH06232815A - Optical transmission module - Google Patents

Abstract

PURPOSE:To compactly and easily connect microcomputers and to enable long distance transmission by incorporating an interface to be directly connected with the microcomputer. CONSTITUTION:Concerning desired data to be transferred, this optical transmission module is selected by inputting it to a chip selection terminal 17 and when a read/write control terminal 18 is turned to a read side, the information of a data bus is inputted to a data register 5 for transmission. The contents of a data register 12 for transmission are transferred to a shift register 6 for serial conversion, converted to serial signals by a clock generated by a bit generator 13, converted to optical signals by an electrical-optical transducer 7 and sent through an output terminal 8 to an opposite side by an optical fiber transmission line. The input state of transmitted data can be monitored at the microcomputer by a transmission control register 14. The information on the opposite side can be transferred by the similar method, as well.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical transmission module capable of easily transferring parallel data of a microcomputer system to another microcomputer system.

[0002]

2. Description of the Related Art In order to transfer parallel data from a conventional microcomputer system to another microcomputer system, it is possible to share a data bus when the distance is short, but when the distance is long, the parallel data is generally transferred. Once converted into serial data and transmitted through a driver, the other party receives it through a receiver, converts serial data into parallel data, and transfers it to a microcomputer system.

Regarding the data transfer interface with the peripheral equipment of the microcomputer, Iwamori Morishita "Microcomputer Hardware (Iwanami Course Microelectronics 5)" Iwanami Shoten 1984.11, p167-p
173.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to use an optical transmission module incorporating an interface that can be directly connected to a microcomputer, which is small in size and easily connects the microcomputers to each other and performs long-distance transmission. .

[0005]

The above-mentioned objects are electro-optical,
This can be realized by configuring an optical transmission module having an interface that can be directly connected to a microcomputer in the optical transmission module having an optical-electrical conversion function.

[0006]

The optical transmission module of the present invention comprises a data register as a transmission unit for taking in information of the data bus of the microcomputer, a shift register for serial conversion, and an electrical register.
It consists of an optical converter, and the receiving unit consists of an optical-electrical converter, a shift register for parallel conversion, and a data register for sending to the data bus of the microcomputer. Data can be easily transferred.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the structure of data transfer between microcomputers according to the present invention. Information to be transferred from the microcomputer 1 is input to the optical transmission module 2 of the present invention via the data bus 4. In the optical transmission module 2, the parallel data is converted into serial data, converted into an optical signal, and transmitted to the other side through the optical fiber 3. On the receiving side, the optical signal is converted into an electric signal by the optical transmission module 2, the serial data thereof is converted into parallel data, and the parallel data is transferred to the microcomputer 1 on the other side by the data bus 4. The other party's information can be transferred in the same manner. The optical transmission module 2 has both transmitting and receiving functions.

FIG. 2 shows an example of the configuration of the optical transmission module 2 according to the present invention. The interface with the microcomputer inputs / outputs signals through the input / output terminal 16, the chip select terminal 17, and the read / write control terminal 18 of the data bus 4. The input / output terminals 19 and 20 are clock input / output terminals for serial transfer.

A case where the data of the microcomputer is transferred to the other party will be described. The data to be transferred is input to the chip select terminal 17 of the present optical transmission module, and the present optical transmission module is selected. When the read / write control terminal 18 is on the read side, the information on the data bus is input to the input / output terminal 16. Data register for transmission via 5
Entered in. The contents of the transmission data register 12 are transferred to the serial conversion shift register 6, converted into a serial signal by the clock generated by the bit generator 13, converted into an optical signal by the electro-optical converter 7, and output from the output terminal 8. It is sent to the other side through the optical fiber transmission line. The input state of the transmission data can be monitored by the microcomputer by the transmission control register 14.

Next, the case where the optical reception signal from the other party is transferred to the microcomputer will be described. The optical reception signal is input to the optical-electrical converter 10 through the input terminal 9, converted into an electric signal, and then the bit generator 13
It is input to the shift register 11 for parallel conversion by the clock generated in. This data can be transferred to the microcomputer via the data bus when the present optical transmission module is selected by the chip select terminal 17 and the read / write control terminal 18 is on the write side via the receiving data register 12. You can The state of the received data can be monitored by the microcomputer by the reception control register 15.

The optical transmission module can be connected not only to a microcomputer but also to general hardware by a simple control signal.

[0012]

According to the present invention, by using an optical transmission module incorporating an interface which can be directly connected to a microcomputer, the optical transmission module is small and can easily connect the microcomputers to each other and can perform long-distance transmission. The role is very large.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of data transfer between microcomputers.

FIG. 2 is a diagram showing a configuration of an optical transmission module.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Microcomputer, 2 ... Optical transmission module, 3 ... Optical fiber, 4 ... Data bus, 5 ... Transmission data register, 6 ... Serial conversion shift register, 7 ... Electric-optical converter, 8 ... Output terminal, 9 ... input terminal, 10 ... optical-electrical converter, 11 ... parallel conversion shift register, 12 ... transmission data register, 13 ... bit generator, 14 ... transmission control register, 15 ... reception control register, 16 ... data input / output Terminals, 17 ... Chip select terminals, 18 ... Read / write control terminals, 19, 20 ... Serial transfer clock input / output terminals.

Claims (1)

[Claims] 1. An optical transmission module having an electric-optical and optical-electrical conversion function, which has a built-in interface which can be directly connected to a microcomputer.