JPS60171540A - Integrated circuit - Google Patents

Abstract

PURPOSE:To identify an integrated circuit IC by providing a read-only discrimination lable register storing the coded information inside the IC and reading electronically this register from outside. CONSTITUTION:An instruction is put on a control signal 10 to read out an ID register 70 storing the identification label ID information (name of IC, number of plates, working speed, name of maker, etc.) of an IC. Then a control circuit 30 decodes said instruction and turns on an output instruction signal 52 to deliver the contents of the register 70 onto a data bus signal 20. A data buffer circuit 40 is set at a high impedance by a data buffer control signal 52 given from the circuit 30. Therefore the signal 20 is never affected by the circuit 40. While the register 70 is set at a high impedance under the control of the circuit 30 when the circuit 40 is kept active.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a circuit configuration of an integrated circuit used in all 14-information processing devices ranging from microcomputers to very large computers.

It is an object of the present invention to solve the problem that hitherto only the alphanumeric characters printed on the case of an integrated circuit by the manufacturer of the integrated circuit can be used.
The product name of the o-circuit was previously known as a read-only register (ID
An object of the present invention is to provide an integrated circuit having a circuit configuration in which the integrated circuit can be identified by providing a register (register) and reading out the register electronically from the outside.

According to the present invention, there is provided a dedicated and general-purpose integrated circuit that inputs and outputs control signals and data bus signals, and the data bus signal ■l) (Iden
By providing a new register, the contents of the above-mentioned II) register can be output to the data bus signal. Information can be obtained, such as automatic selection and execution of test programs suitable for the integrated circuit when a single integrated circuit is used, and diagnostic programs that check for incorrect mounting and identify the version number and manufacturer of the integrated circuit when installing the device 6. Provided is an integrated circuit that can perform automatic branching and the like.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of an integrated circuit according to the present invention. The circuit in the embodiment of FIG. 1 consists of address, write, read signals, etc.
No. 8 10, data bus signal 20, control circuit 30 which uses control signal 10 as human output, data buffer 1ltjl r which uses data bus signal 20 as input and output and outputs from control circuit 30
The data fAf is controlled by the Illll signal 51.
3-state bidirectional data rose “7a circuit 40, f
Timing control signal 50 from lj control circuit 30 and internal data bus signal 60 from data buffer circuit 40
It is a dedicated and general-purpose integrated circuit basically consisting of 414 data processing circuits 100 as all inputs and outputs, and a control circuit 30.
A new 3-state read-only ID register 70 has been added that outputs ID information such as the name, version number, operating speed, and manufacturer name of the integrated circuit on the data bus signal 20 in response to an output command signal 52 from the There is.

As is clear from the configuration of the embodiment shown in FIG. 1, the present invention is largely characterized in that a read-only ID register is added to a general purpose-built and general-purpose integrated circuit. The purpose and usage of the F read-only ID register will be explained below. FIG. 2 shows an example of the format of ten read-only 16-bit registers that store various information regarding the integrated circuit. Figure 2 shows 12
Bits (bits 4 to 15) f indicate the name, 2 bits (bits 2 to 3) indicate the operating speed, and the remaining 2 bits (bits 0 to 1) indicate the function of the integrated circuit. This is an example of an ID register formatted into bits indicating the history of additions, ie, the version number. 1st
It is used like the IIJID register shown in FIG.

In FIG. 1, when a command to read the ID register 70 storing ID information of the integrated circuit is placed on the control signal 10, the control circuit 30 decodes this command and turns the output command signal 52 ON. The contents of register 70 are output on data bus signal 20.

Note that at this time, the data buffer circuit 40 is connected to the control circuit 30.
The data bus signal 20 is not affected because it enters a high impedance state due to the data buffer control signal 52 from the data buffer control signal 52 . Conversely, when the data buffer circuit 40 is operating, the ID register 70 is controlled by the limit j circuit 30 to be in a high impedance state.

As is clear from the above, the following various advantages and future developments can be expected by adding an ID register for storing ID information regarding integrated circuits as shown in the present invention.

First, the advantages for integrated circuit manufacturers are as follows.

(b) If we standardize the allocation of input/output terminals for control signals and data signals necessary to access the ID register in integrated circuits with the same number of terminals, it is possible to automatic testing becomes possible.

(b) Therefore, under the conditions shown in (b) above, FA (
Factory Automation) can be easily realized.

Next, the advantages of integrated circuits for users include the following points.

(b) Troubles due to differences in version numbers can be avoided during acceptance inspection of integrated circuits, and inspection can be automated.

(CI) makes it possible to electronically check for incorrect mounting when mounted on a device or printed circuit board.

(c) When a function of an integrated circuit is added, the presence or absence of the function can be checked by reading the contents of the ID register, so that the functions of the device can be managed electronically.

As described above, the present invention has many advantages even when the assignment of input/output terminals of an integrated circuit is not standardized, and if it is standardized, it will exhibit significant advantages. Furthermore, although most electronic circuits are now being integrated into integrated circuits, the concept of the present invention can also be used to standardize the functional assignment of input/output terminals. If standardization is achieved, it will be a great relief to manufacturers and users who are suffering from the rapid increase in the variety of integrated circuits, and it will encourage even greater development.

As explained above, the present invention adds dedicated and general-purpose integration port ME ID registers for human output of control signals and data bus signals, so that the name and version number of the integrated circuit can be changed.
Since encoded ID information such as operating speed and manufacturer can be obtained, automatic selection of diagnostic programs, checking for incorrect mounting of integrated circuits, etc. can be performed electronically without human intervention.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one example of an integrated circuit according to the present invention/1 m, and FIG. 2 is a block diagram of an integrated circuit according to the present invention.
An example of the IJID register format is shown (Fig. 7). lO... control φ11 signal, 20... data bus signal,
0...Control i'I11 circuit, 40 ・Data bus 7a circuit. 50...Timing control signal, 51...Data buffer jlj control 4 m x, 52...
- Output instruction No. 1, 60... Internal data bus signal, 70... ID register. Agent Patent Attorney Rikichi Somekawa

Claims (1)

[Claims] In dedicated and general-purpose integrated circuits that output control signals and data bus signals, control circuits, data buffer circuits,
A read-only ID register consisting of a plurality of bits that stores encoded information regarding the integrated circuit is provided on basic circuit components such as a data processing circuit, and the information in the ID register is read by the control signal. An integrated circuit characterized in that it is read out on a data bus signal.