JPH0264999A - Program writing device - Google Patents

Abstract

PURPOSE:To write a program even in a surface-mounting type ROM by compos ing the title device of a programmer capable of writing the program to be written when an IC clip is fitted to a ROM chip through a probe, etc., to the ROM chip. CONSTITUTION:The pin of a ROM chip 15 surface-mounted on a printed wiring board 13 and an IC clip 3 can be electrically brought into contact with each other by fitting the IC clip 3 to the ROM chip 15. Next, the program expanded on a RAM 9 of a ROM programmer 11 is written from the ROM programmer 11 through a socket 5, a probe 7, and the IC clip 3 to the ROM chip 15. Consequently, the program is written to the ROM chip 15. Thus, the program can be written even to the surface-mounting type ROM chip 15.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a program writing device that writes a program to a read-only memory chip, and in particular is capable of writing a program to a read-only memory chip that is directly attached to a printed circuit board. This invention relates to a program writing device.

[Conventional technology]

Conventionally, this type of program writing device writes a program after removing it from a printed circuit board and mounting a read-only memory chip (ROM) thereon. Therefore, in order to write a program into a ROM using a conventional program writing device, the ROM must have a structure that can be removed from the printed circuit board.

[Problem to be solved by the invention]

Therefore, according to the conventional program writing device, RO
If M is directly attached to the printed circuit board, there is a drawback that programs cannot be written to it.

The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a program writing device that can write a program even if a ROM is directly attached to a printed circuit board.

[Means to solve the problem]

In order to achieve the above object, the program writing device of the present invention is a program writing device that writes a program to a read-only memory chip, and is removably attached to the pins of the read-only memory chip, and makes electrical contact when attached. This device is composed of a probe provided with an IC clip that can be used to perform the IC clip, and a programmer that can write a program to be written into the read-only memory chip through the probe when the IC clip is attached to the read-only memory chip.

In the present invention, writing to the ROM is performed as follows. That is, an IC clip is first attached to a ROM directly attached to a printed circuit board, and the pins of the ROM and the IC clip are brought into electrical contact. Next, a program is written into the ROM from the programmer via the probe/IC clip.

As a result, the program will be written into the ROM. As described above, according to the present invention, a directly attached ROM
Even if it is, you will be able to write programs.

〔Example〕 Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a program writing device of the present invention.

In FIG. 1, a program writing device 1 is connected to a probe 7 provided with an IC clip 3 and a socket 5 through the socket 5, and is a ROM programmer capable of supplying a program developed on RAMQ to the probe 7. 11 and 61&.

The IC clip 3 is detachably attached to the pins of the ROM chip 15 directly attached to the printed circuit board 13, and has a structure that allows electrical contact to be made when attached. That is, the IC clip 3 is provided with an arm 30.31 having a large number of electrodes that can make electrical contact with the pins of the ROM chip 15, and a column 32.33 provided approximately at the center of the arm 30.31, which is rotated by a dowel pin 34. The arm 30.31 can be supported by the spring 3
The tip is closed at 5. The ROM programmer 11 is a device that can write a program written on the RAM 9 to the ROM chip 15 via the probe 7 and the IC clip 3.

The operation of the embodiment configured in this way will be explained.

ROM chip 15 directly attached to printed circuit board 13
First, attach the IC clip 3 to the device. Thereby, the pins of the ROM chip 15 and the IC clip 3 can be electrically contacted. Next, the program expanded on the RAM 9 of the ROM programmer 11 is
OM programmer 11 to socket 5, probe 7, IC
Write to the ROM chip 15 via the clip 3.

As a result, the program will be written into the ROM chip 15.

In this way, according to this embodiment, the directly attached ROM chip 1
Even if it is 5, it will be possible to write a program.

〔Effect of the invention〕

As explained above, in the present invention, programs can be written while the ROM chip is attached to the printed circuit board, so an IC socket for the ROM chip is no longer required.
This has the effect of reducing the number of parts and preventing failures due to poor contact due to the IC socket.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention. 1...Program writing device, 3...IC clip, 7...Probe, 11...ROM programmer, 13...Printed circuit board , L5...RO
M chip. Applicant: NEC Engineering Co., Ltd. Agent
Patent attorney Umeo Yamauchi

Claims (1)

[Claims] A program writing device for writing a program to a read-only memory chip, comprising: a probe that is detachably attached to a pin of the read-only memory chip and is provided with an IC clip that can make electrical contact when attached;
A program writing device comprising: a programmer capable of writing a program to be written when a C clip is attached to a read-only memory chip into the read-only memory chip via the probe.