JPH05189985A - Eprom its writing device and writing method - Google Patents

Abstract

PURPOSE:To perform the erasure and write of data on an EPROM without reloading on another device. CONSTITUTION:An ultraviolet radiation port 4 is formed on the upper plane of a packaging part 3 provided at the upper part of the main body 2 of a writing device 1. Also, an ultraviolet irradiation window 12 is formed on the lover plane of the package 11 of the EPROM 10 so as to face with the ultraviolet radiation port 4 of the packaging part 3 when the EPROM 10 is loaded on the packaging part 3. The data in the EPROM 10 can be erased by loading the EPROM 10 on the packaging part 3 of the writing device 1, and irradiating the ultraviolet irradiation window 12 with ultraviolet rays from the ultraviolet radiation part 4. Also, new data can be written on the EPROM 10 as leaving the EPROM on the packaging part 3 after the data erasure is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an EPROM capable of electrically writing data and erasing the written data by irradiation with ultraviolet rays, a writing apparatus therefor, and a writing method therefor.

[0002]

2. Description of the Related Art In an EPROM which has been used conventionally, an irradiation window of ultraviolet rays which is irradiated when erasing data is provided on the upper surface of the EPROM package. Such an EPR
Deletion and writing of the data written in the OM requires a dedicated erasing device and writing device, respectively.
Data was rewritten by alternately using each device. That is, the EPROM is mounted in a dedicated erasing device, and the irradiation window on the upper surface of the EPROM is irradiated with ultraviolet rays for a predetermined time to erase the data in the EPROM, and then the EPROM is remounted in the writing device to write the desired data to the EPROM. I was writing.

[0003]

As described above, in the conventional method, the erasing and writing of the EPROM data must be performed by different devices, so that rewriting the EPROM data is very troublesome. There was a problem of this. The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an EPROM capable of erasing and writing data without reattaching it to another device, a writing device and a writing method therefor. There is.

[0004]

In order to solve the above-mentioned problems, an EPROM of the present invention is such that a lower surface of a package is mounted on a mounting portion provided on an upper portion of an EPROM writing apparatus main body, and the lower surface of the package is mounted on the lower surface. An ultraviolet irradiation window is formed.

The EPROM writing device of the present invention is
A mounting portion is provided on the upper part of the main body, and an EPROM having a mounting surface on the lower surface of the package and an ultraviolet irradiation window formed on the mounting surface is mounted on the mounting portion upper surface. An ultraviolet radiation port is formed at a position corresponding to the ultraviolet radiation window of the EPROM.

Further, according to the EPROM writing method of the present invention, a mounting portion is provided on the upper portion of the main body, and an EPROM writing device in which an ultraviolet radiation port is formed on the upper surface of the mounting portion and a lower surface of the package are mounted on the EPROM writing device. And an EPROM in which an ultraviolet irradiation window is formed at a position corresponding to the ultraviolet radiation port on the mounting surface.
M is mounted on the mounting portion of the EPROM writing device, and ultraviolet rays are radiated from the ultraviolet radiation port of the mounting portion toward the ultraviolet irradiation window of the EPROM to erase the data in the EPROM. After going for an hour, E
The PROM is read to determine whether or not the data has been erased. Then, after erasing the data of the EPROM, the RAM data of the EPROM writing device is written in the EPROM, the data written in the EPROM is read out thereafter, and the data is compared with the RAM data to write the data. It is designed to determine whether or not has ended.

[0007]

According to the EPROM of the present invention, when the package lower surface of the EPROM is mounted on the mounting portion of the EPROM writing device and ultraviolet rays are emitted from the EPROM writing device, the ultraviolet rays emit the ultraviolet irradiation window formed on the lower surface of the package. The element portion of the EPROM is irradiated via the light.

According to the EPROM writing device of the present invention, when the lower surface of the EPROM is mounted on the mounting portion provided in the main body of the EPROM writing device, the ultraviolet irradiation window formed on the lower surface of the EPROM and the mounting portion of the mounting portion are provided. The ultraviolet ray emission port formed on the upper surface is substantially opposed. And the above E
When ultraviolet rays are radiated from the ultraviolet ray emission port of the EPROM writing device when erasing the data of the PROM, the ultraviolet rays enter through the ultraviolet ray irradiation window of the EPROM and the EPR
The element portion of the OM is irradiated and the data in the EPROM is erased.

Further, according to the EPROM writing method of the present invention, the EPROM is mounted on the mounting portion of the EPROM writing device, and when the user specifies the erasing of the data of the EPROM writing device, the EPROM is emitted from the ultraviolet radiation port of the EPROM writing device. Ultraviolet rays are emitted toward the ultraviolet irradiation window. Then, the ultraviolet rays are irradiated to the element portion of the EPROM through the ultraviolet irradiation window of the EPROM, and the EPR
The OM data is deleted. Then, the EPROM writing device reads the data of the EPROM to determine whether the data is completely erased. If the data is not completely erased, the EPROM writing device reads the EPR from the ultraviolet ray emitting port.
Ultraviolet rays are emitted toward the ultraviolet irradiation window of the OM. As a result, the data in the EPROM is completely erased. When the user specifies writing of data to the EPROM after the data has been erased, the EPROM is set to the EPROM.
The RAM data of the EPROM writing device is written while it is mounted in the mounting portion of the writing device. Then EP
The ROM writing device reads the written EPROM data and compares it with the previous RAM data to determine whether the writing of the data is completed. If the writing of data is incomplete, the writing is performed again by the EPROM writing device,
The new data will be completely written to.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an EPROM, a writing device therefor and a writing method therefor according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view showing an example of an EPROM writing device (hereinafter, simply referred to as a writing device) of the present invention, and also shows how an EPROM is mounted. FIG. 2 is a perspective view of the EPROM of the present invention when viewed from the bottom side.

In FIG. 1, reference numeral 1 is a writing device of this embodiment,
A mounting unit 3 is provided on the main body 2 of the writing device 1. An ultraviolet radiation port 4 is formed at a substantially central position on the upper surface of the mounting portion 3, and the mounting portion 3 has an E-shaped opening 4 as will be described later.
The PROM 10 is mounted. Further, the main body 2 of the writing device 1 is provided with an operation instructing section 5 including a plurality of operation keys. On the other hand, the EPROM 10 is composed of a substantially rectangular package 11 and lead terminals 13 attached to the ends of the package 11, and serves as a mounting surface for the mounting portion 3 of the writing device 1.
An ultraviolet irradiation window 12 is formed on the lower surface of 1 at a position facing the ultraviolet irradiation port 4 of the mounting portion 3.

Next, the EPROM 10 having the above structure
A method of newly writing data in the EPROM 10 in which data has already been written using the writing device 1 will be described. FIG. 3 is a flow chart showing the outline of the EPROM writing method of the present invention. When writing new data to the EPROM 10 in which the data has already been written, the user first attaches the EPROM 10 to the mounting portion 3 of the writing device 1. Then the writing device 1
The erasing of the data in the EPROM 10 is designated by the operation instructing section 5.

When the erasing of the data in the EPROM 10 is designated, the writing device 1 emits ultraviolet rays from the ultraviolet ray emission port 4 toward the ultraviolet ray irradiation window of the EPROM 10 as shown in step 1 of FIG. Then, it is judged whether or not the ultraviolet ray is emitted for a certain time (step 2). If the certain time has not elapsed, the ultraviolet ray is continuously emitted, and if the certain time has elapsed, the data of the EPROM 10 is read (step 3). .. After this, the writing device 1 is
It is determined whether or not the data in all the address areas of the OM 10 are erased (step 4), and when it is determined that the erasing is incomplete, the process returns to step 1 to radiate ultraviolet rays, and the above operation is repeated. If the writing device 1 determines that the data in all the address areas of the EPROM 10 has been completely erased, the data erasing operation of the EPROM 10 is terminated. In addition, E
In some cases, erasing the data in the PROM 10 is impossible. Therefore, it is possible to preset the number of retries for determining the emission of ultraviolet rays and the reading of data from the EPROM 10 and the erasing of the data, and if the number of retries is exceeded, a warning is displayed indicating that a failure of the EPROM 10 has been detected.

Next, the user is informed that the data has been erased.
Writing is designated from the operation instructing unit 5 with the PROM 10 mounted in the mounting unit 3 of the writing device 1. Then, the writing device 1 writes the RAM data in the writing device 1 in the entire address area of the EPROM 10 as in the conventional case (step 5). Then, after that, the data in the EPROM 10 is read (step 6) and compared with the previous RAM data to judge whether or not the data writing is completed (step 7). When the writing device 1 determines that the writing of data is incomplete, the process returns to step 5 and the operation of writing the RAM data to the entire address area of the EPROM 10 is performed again. When the writing device 1 determines that the writing of the data is completed, the data writing operation is completed.

As described above, in this embodiment, the EPROM 10 can be installed in the writing device 1 only once.
The data in M10 can be erased and written. Therefore, it is possible to save the trouble of reattaching the EPROM to another device each time data is erased and written, which is excellent in convenience.

[0016]

As described above, the EPROM of the present invention.
According to the above, when the lower surface of the package of the EPROM is mounted on the mounting portion of the EPROM writing device and ultraviolet rays are emitted from the EPROM writing device, the ultraviolet rays are emitted to the element portion of the EPROM through the ultraviolet irradiation window formed on the lower surface of the package. The EPROM data can be erased.

Further, according to the EPROM writing apparatus of the present invention, the EPROM can be erased when the data in the EPROM is erased.
When ultraviolet rays are emitted from the ultraviolet ray emission port of the writing device,
The EPROM through the ultraviolet irradiation window of the EPROM
The element part of can be irradiated with ultraviolet rays. Therefore, data can be erased by the same device that writes data.

Further, according to the EPROM writing method of the present invention, since the EPROM data can be erased and written only by mounting the EPROM once in the EPROM writing device, another device is erased each time the data is erased and written. It is possible to save the trouble of re-installing the EPROM, which is excellent in convenience.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an example of an EPROM writing device according to the present invention.

FIG. 2 is a perspective view of an EPROM according to the present invention when viewed from the lower surface side.

FIG. 3 is a flowchart showing an outline of an EPROM writing method according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Writing device 2 Main body 3 Mounting part 4 Ultraviolet radiation port 10 EPROM 11 Package 12 Ultraviolet irradiation window

Claims (3)

[Claims] 1. An EPR in which a lower surface of a package is mounted on a mounting portion provided on an upper portion of an EPROM writing apparatus main body.
An EPROM, which is an OM, wherein an ultraviolet irradiation window is formed on the lower surface of the package. 2. A mounting portion is provided on an upper portion of the main body, and
An EPROM having a lower surface of the package as a mounting surface and an ultraviolet irradiation window formed on the mounting surface is mounted on the mounting portion E
An EPROM writing device, wherein an ultraviolet radiation port is formed on the upper surface of the mounting portion at a position corresponding to the ultraviolet irradiation window of the EPROM. 3. A mounting portion is provided on an upper portion of the main body, and
EPROM having an ultraviolet radiation port formed on the upper surface of the mounting portion
The writing device and the EPROM in which the lower surface of the package is used as a mounting surface for the mounting portion of the EPROM writing device and an ultraviolet irradiation window is formed on the mounting surface at a position corresponding to the ultraviolet radiation port An EPROM writing method, comprising the step of mounting the EPROM in a mounting portion of the EPROM writing device, radiating ultraviolet rays from an ultraviolet ray emission port of the mounting portion toward an ultraviolet irradiation window of the EPROM, and A step of erasing, a step of reading the EPROM after radiating the ultraviolet rays for a predetermined time, and judging whether or not the erasing of the data is finished, and a step of erasing the data of the EPROM, and a RAM data of the EPROM writing device. And writing the data written in the EPROM in the step. And,
And a step of comparing the data with the RAM data to determine whether or not the writing of the data is completed.