JPH01287899A - Method for writing data to programmable read only memory - Google Patents

Abstract

PURPOSE:To increase a contact reliability and to easily attain the data writing to a ROM by directly sticking the ROM to a memory substrate different from muP, connecting the same type of the substrate as the memory substrate to a ROM writer as a repeating substrate and executing the data writing to the ROM. CONSTITUTION:A microprocessor (muP) substrate 2 and a memory substrate 1 are always electrically connected and operated, and at the time of the data writing of a programmable reading exclusive-use memory (ROM)3, the muP substrate 2 and the memory substrate 1 are separated, the memory substrate 1 and a repeating substrate 11 are electrically connected, the repeating substrate 11 and a memory writing device 10 are electrically connected and writing is executed to the ROM3. By using the repeating substrate 11 having the same type of the wiring pattern as such a memory substrate 1, the connection of a cable 12 at the time of connection with a ROM writer 10 can be easily performed. Thus, the contact reliability is increased and the data writing to the ROM can be easily executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to writing data to a programmable read-only memory directly mounted on a printed circuit board.

[Traditional Mi technique]

In general, data writing and rewriting of ultraviolet erasable programmable read-only memory (hereinafter referred to as rROMJ) placed on a printed circuit board (hereinafter referred to as ``board'') is shown in Figure 4.
The method shown in FIG. 5 is used.

In Figure 4, (9) is the printed circuit board, and 3) is the RO.
M, 141 is a microprocessor (hereinafter abbreviated as "μP")
), +81r/iI 07'y')) is 6, ROM1
31 will be implemented. In FIG. 5, tloI is a programmable read-only memory implant [(rR hereinafter).

(abbreviated as "M writer"), (10altf C socket is shown.

Next, the operation when changing the data of the VCROM will be explained. IC on the printed circuit board (9) as shown in Figure 4 VC
When it is necessary to change the data in the ROM+31 mounted in the socket (8), remove the ROM+31 from the IC socket (8), erase it with ultraviolet light, and then write it on the ROM writer (lO) as shown in Figure 5. is mounted on the IC socket [10a). ROM +3 by ROM writer (lO)
After data writing to 1 is completed, the ROM (31 is mounted on the IC socket 18 in FIG. 4) again and operated by the μP (41).

The ROM was mounted on an IC socket in the Showa 5 era.
Published by Mitsubishi Electric in November 1999, ``Mitsubishi PCB Computer User Service Manual PC!This is commonly used, including A3517J.''

[Problem to be solved by the invention]

In the conventional ROM rewriting method, the VCROM must be removed from the IC socket every time the ROM is rewritten as described above, which poses problems such as lowering the reliability of the contact between the IC socket and the ROM slot.

This invention was made to solve the above-mentioned problems, and it not only improves contact reliability but also makes it easy to use KROM.
The purpose is to obtain a method that allows data to be written to.

[Means to solve the problem]

In this invention, the ROM is mounted on a separate board (memory board) from the μP.
The data writing to the ROM is realized by mounting the memory board on the memory board, directly attaching it to the board, and connecting the same type of board as the memory board to the ROM writer as a relay board.

[Effect]

Method of writing data to ROM in this invention, 1. RO
The contact sensitivity is increased by direct attachment of M, and the wiring pattern is the same as that of the memory board? By using the relay board, cable connection when connecting to a ROM writer can be easily made.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings. 1st
In the figure, II+ is a memory board.

ROM lul+ and connector 15) are mounted. Here, the ROM+a+q memory board 1111c is directly attached: 21 is a μP board, on which the μP 141, connector (6), etc. are mounted. (71 is a cable, which is inserted into the connector 51, +s+ and connected to the memory board i.
Connect ll and μP board (2).
has been implemented. Port υ is a relay board, which is a printed circuit board with exactly the same wiring pattern as the memory board (11). 11 is a cable, and one end is connected to the relay board υ
Memory board 111 on υ ROM 131 on Vc
Direct mounting is mounted in the position where is mounted, and the other end is ROM
The IC socket 11Oal 1C on the writer (10) is inserted.

Next, the data rewriting operation of the ROM configured as above will be explained. Normally, connect as shown in Figure 1, μ
P (41 is operating ROM +31. m1 When changing the data of ROM +31 in the state shown in the figure,
Remove the cable (7) from the connector (61) and remove the memory board Ill from the μP board 12. ROM +3
After performing ultraviolet ray erasure in step 1, connections are made as shown in FIG. That is, connect the cable (71) to the connector +lil on the relay board υ, and insert the cable 1121 connected to the relay board tJllK into the connector C socket (10al) on the ROM writer 1101.The memory board Il+ and the relay board +1υ are the same. Since it is a printed circuit board with a wiring pattern, ROM +31, cable 1, and relay board 1 for +21 are used.
．． Each bin number of 1D11111 corresponds to 1:1, and as a result, ROM 131 and cable (1 ROM writer)
On the 10) side, there is a one-to-one correspondence between the pins of IIIJ and C socket (10al).As a result, exactly the same effect as when ROM +31 is directly inserted into C socket +10a is produced. ROM writer 1101 K therefore RO
After writing the data to M131, mount the memory board II+ again as shown in Fig.
Operate 1.

In addition, the above is true! In the M example, is it one end of the cable Shino? Relay board d
Although it is mounted on the same type of through hole as the ROM 131 on υ, there is no need for any cable, and it is convenient to mount connector 04 as shown in FIG. In this case as well, the same effect as in the above embodiment can be obtained by inserting it into the Funecta OS 10al.

〔Effect of the invention〕

As described above, the VC of the present invention includes a memory board to which a ROM is directly attached, a μP board, and a relay board, which makes it possible to easily connect a ROM writer and an FtOM, and to improve the contact sensitivity of the ROM. There are effects that can be improved.

[Brief explanation of the drawing]

Fig. 1 is a diagram of a μP and ROM loading device showing one embodiment of this invention, Fig. 2 is a connection diagram of a memory board and ROM writer showing an example of this invention, and Fig. 3 is a diagram of the connection between a memory board and a ROM writer. A connection diagram of a memory board and a ROM writer showing another example of the present invention,
FIG. 4 is a perspective view showing a conventional μP%FtOM tower equipment;
FIG. 5 is a connection diagram of a conventional ROM and FIOM writer. In the figure, 11) is a memory board, +21 is a μP board,
31 is ROM, 141 is μP, , 51, j31
connector, (9) a printed circuit board, (101 is a ROM
Writer, +81, (10a) is the engineering C socket, Ryudan is the relay board, +121 is the cable. In addition, are the same symbols in the figures the same or equivalent parts? show.

Claims (1)

[Claims] A μP board on which a microprocessor (μP) is mounted, a memory board on which a programmable read-only memory (ROM) is directly attached, and a memory writing device electrically connected to the memory board. It is equipped with a relay board that can be electrically connected to both, and is normally operated by electrically connecting the μP board and memory board, but when writing data to the memory (ROM), the μP board and memory board are separated. The memory board and the relay board are electrically connected to each other, and the relay board and the memory writing device are electrically connected to each other to write the memory (ROM).
A method for writing data to programmable read-only memory.