JPH01243134A - System developer - Google Patents

Abstract

PURPOSE:To reduce the manhour of developing and manufacturing processes by forming a microprocessor and plural peripheral circuits to be prepared beforehand as individual semiconductor integrated circuit devices, respectively, and composing a microcomputer system corresponding to the microcomputer of one chip on a packaging substrate. CONSTITUTION:A microprocessor CPU and plural peripheral circuits LC1-LC6 to be prepared beforehand are formed as individual semiconductor integrated circuit devices, respectively. The microcomputer system for a development is composed which is corresponding to the microcomputer of one chip to have the microprocessor and peripheral circuits LC1-LC6 to be mounted according to the specification of a user on a packaging substrate PB. For the one chip microcomputer for a system developer, it is sufficient to incorporate the semiconductor integrated circuit devices to be formed beforehand on the packaging substrate PB. Thus, the manhour of the developing and manufacturing processes can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a system development device, and relates to a technique that is effective when used in, for example, a system development device for a one-chip microcomputer for a specific purpose.

[Conventional technology]

As an example of a microcomputer system development bag W,
■Hitachi, Ltd. "Hitachi Microcomputer System 6305UO/6305VO Emulator User's Manual" published in September 1985, pages 64 to 88.

[Problem to be solved by the invention]

In the one-chip microcomputer described above, the built-in peripheral circuits are fixed. Therefore, it is not a problem to make microcomputer chips for system development. However, with a microprocessor as the core, pre-prepared timers, DMAC (direct memory access control circuit), A/D conversion circuit, D/A conversion circuit,
In addition to peripheral circuits such as memory circuits, ASIC (application-specific) microcomputers are equipped with peripheral circuits that meet the user's specifications, so they are inevitably produced in small quantities and in a wide variety of products. Therefore, creating a system development depth for each product type increases the number of development and manufacturing steps.

An object of the present invention is to provide a system development device for a one-chip microcomputer for specific applications, which greatly reduces the number of development and manufacturing steps.

The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

[Means to solve the problem]

A brief overview of typical aspects of the invention disclosed in this application is as follows.

That is, a microprocessor and a plurality of peripheral circuits prepared in advance are formed as individual semiconductor integrated circuit devices, and the microprocessor and peripheral circuits are mounted on a mounting board according to the user's specifications. A microcomputer system compatible with a single-chip microcomputer is constructed.

[For production]

According to the method described in J2, it is only necessary to incorporate a semiconductor integrated circuit device in which a one-chip microcomputer for system development equipment is formed in advance onto a mounting board, so that the development and manufacturing man-hours can be significantly reduced. .

〔Example〕

FIG. 1 shows a block diagram of an embodiment of a development microcomputer system used in a system development apparatus according to the present invention.

The one-chip microcomputer to be developed in this example has a microprocessor as its core.
Timer, DMAC (direct memory access control circuit),
Peripheral circuits such as A/D conversion circuits, D/A conversion circuits, memory circuits, etc. are modularized (standardized) and prepared. Among the various peripheral circuits described above, a peripheral circuit is selected according to the user's specifications and formed in one semiconductor integrated circuit device together with the microprocessor to form a one-chip microcomputer.

In order to efficiently develop such a small-volume, multi-product microcomputer system, in this embodiment, the microprocessor and each of the standardized peripheral circuits described above are individually formed using semiconductor integrated circuit devices. Leave it there. In this case, in order to facilitate system development, the microprocessor CPU is provided with a terminal for outputting information on the contents of registers and the like to the outside, if necessary. Then, as shown in Fig. 1, the printed circuit board P
Various wiring such as a bus BUS for interconnecting each circuit is formed on B, and depending on the one-chip microcomputer system to be developed, a microprocessor CPU, a custom module circuit CM, and a chip control circuit CC1 are installed. and peripheral circuits LC such as timers, DMAC, A/D conversion circuits, D/A conversion circuits, memory circuits, etc.
It implements I to LC6.

It is desirable that each of the microprocessors and peripheral circuits described above be packaged in a unified package in order to facilitate their replacement. For example, in a system that has a 16-byte ROM (read-only memory), an IK hide RAM (random access memory), and an 8-bit load timer as peripheral circuits, each of the peripheral circuits LC1 to LC3 has a It is sufficient to mount a semiconductor integrated circuit device. When changing the 8-bit load timer to a 16-bit load timer due to a specification change, it is sufficient to simply remove the 8-bit load timer and insert the 16-bit load timer in its place.

In addition, if the printed circuit board PB is equipped with an IC socket that supports the maximum number of peripheral circuits, the printed circuit board PB can be standardized, and can be applied to any target microcomputer system that has the standardized peripheral circuits mentioned above. It can be shared. Instead of the above-mentioned IC socket, the printed circuit board PB may be provided with a through ball for soldering an IC pin.

The printed circuit board PB has a terminal ASE connected to a system development device. This terminal ASE is connected to the wiring to which the bus BUS and probe terminals formed on the printed circuit board PB are connected, and is connected via a flat cable to an emulator system including a microprocessor, etc. that constitutes a system development device. connected to the side. The printed circuit board PB has one user terminal US
Has R.

This terminal USR is connected to an IC socket in which a one-chip microcomputer in the user system is mounted via a flat cable or the like. With this,”
The microcomputer system configured on the printed circuit board PB operates in place of the one-chip microcomputer that constitutes the user system to be developed, and has an emulation function that takes over the functions of the target microcomputer. . The system development device (not shown) also has a function of lending memory resources on the system (emulator) side when the memory on the user system side is inoperable or has insufficient capacity.

If the microcomputer system configured on the printed circuit board PB of this embodiment is used, development tools corresponding to user specifications can be immediately installed by selectively mounting semiconductor integrated circuit devices configured as described above. Since it can be provided to customers, it is possible to shorten the development period and reduce costs.

The effects obtained from the above examples are as follows. In other words, ('') a microprocessor and a plurality of pre-prepared peripheral circuits are formed as individual semiconductor integrated circuit devices, and the microprocessor and the peripheral circuits are mounted on a mounting board according to the user's specifications. By configuring a development microcomputer system compatible with a 1-chip microcomputer with peripheral circuits, a 1-chip microcomputer for system development equipment can be mounted on a pre-formed semiconductor integrated circuit device on a mounting board. Since it is sufficient to incorporate the device into the device, it is possible to obtain the effect that the development and manufacturing man-hours can be significantly reduced.

(2) If the above-mentioned mounting board is used to mount an IC socket corresponding to the maximum number of mounted peripheral circuits or through-balls for mounting are formed, the printed board PB can also be standardized, and the above-mentioned standardized peripheral circuits can be standardized. This has the advantage that it can be used in common for all target microcomputer systems.

Although the invention made by the present inventor has been specifically explained based on Examples above, the present invention is not limited to the above-mentioned Examples, and it goes without saying that various changes can be made without departing from the gist thereof. Nor. For example, multiple types of microprocessors may be prepared. In this case, it is possible to easily develop one-chip microcomputer systems having different configurations such as 4-bit, 8-bit, and 16-bit. Also, among the peripheral circuits, RO
As M and RAM, commercially available ones configured in a semiconductor integrated circuit device may be used. Furthermore, the mounting board may have any configuration.

The present invention can be widely used as a system development device for a one-chip microcomputer or a semiconductor integrated circuit device having a microcomputer function, which is constructed by a building block method using standardized peripheral circuits such as ASIC. be.

〔Effect of the invention〕

A brief explanation of the effects obtained by typical inventions disclosed in this application is as follows. In other words, a microprocessor and a plurality of peripheral circuits prepared in advance are formed as individual semiconductor integrated circuit devices, and then the microprocessor and peripheral circuits are mounted on a mounting board according to the user's specifications. By configuring a development microcomputer system that is compatible with a 1-deep microcomputer with Therefore, the development and manufacturing man-hours can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of a system development microcomputer system used in a system development apparatus according to the present invention. CPU: Microprocessor, CM: Custom module circuit, CC: Chip control circuit, LCI
~■, C6...Peripheral circuit, BUS...Bus, PB...Printed circuit board Figure 1

Claims (1)

[Claims] 1. A microprocessor and a plurality of peripheral circuits prepared in advance are formed as individual semiconductor integrated circuit devices, and the microprocessor and peripheral circuits are installed according to the user's specifications. 1. A system development device comprising a mounting board for system development in which a semiconductor integrated circuit device constituting the microprocessor and peripheral circuits is incorporated on the mounting board in correspondence with a one-chip microcomputer having the above-mentioned microprocessor and peripheral circuits. 2. The system development apparatus according to claim 1, wherein the mounting board is a printed wiring board.