JPH05100992A - Memory data transfer device - Google Patents

Abstract

PURPOSE:To make the quantity of transfer data small and to shorten time for data transfer by transferring data of a content corresponding to all the pieces of data without transferring all the pieces of data of different plural PROM(nonvolatile memory) at the time of transferring ROM data to an external device. CONSTITUTION:At the time of transferring data to the external device 11 and when data read-out from different PR0Ms1 to 4 happen to be of same content and the storing places happens to be the same concerning the address on a storage area on PROM, a data compression means 12 omits data of PROM excepting for PROM representing corresponding data so as to compress transfer data. Namely, when data read-out from PROM 1 and 2, e.g. have same contents and the storing places are the same concerning the address, data on the side of PROM 2 is omitted and data of PROM 1 is transferred by way of a data transfer means 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a memory data transfer device for transferring data between a non-volatile memory such as a PROM and an external device.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram showing a configuration of a PROM programmer as a conventional memory data transfer device. In FIG. 5, reference numerals 1, 2, 3 and 4 are different ROMs.
PROM for storing data (program etc.) and PR for 5
RO for reading / writing ROM data from / to OM1-4
M data read / write means, 6 ROM data comparison means for comparing data in the PROM with data in the data memory, 7 data memory for storing ROM data to be transferred, and 8 data memory 7 for ROM data etc. Data memory read / write means for reading / writing data from / to the external device, 9 data transfer means for transferring data to / from an external device, 10 remote control means for controlling the above-mentioned means in response to an instruction from the external device, 1
Reference numeral 1 is an external device such as a personal computer as a transfer partner. 13 is ROM data read / write means 5, ROM
It is a PROM programmer as a memory data transfer device including a data comparison means 6, a data memory 7, a data memory read / write means 8, a data transfer means 9 and a remote control means 10.

Next, the operation of this conventional example will be described with reference to the flowchart of FIG. The PROM programmer 13 first activates the remote control means 10. In step 20,
In order to establish communication with the PROM programmer 13, the external device 11 requests the PROM programmer 13 to establish communication, and in response to this, the remote control means 10 communicates with the external device 11 via the data transfer means 9. Establish. The branch of the next step is displayed for convenience of explanation of the operation, and the memory data transfer device (PROM programmer)
1 function is not included.

Now, a process branched to the left side in the figure, that is, an operation of reading data from the PROM and transmitting the data to the external device 11 will be described. In step 21, the external device 11 requests the remote control means 10 to read data via the data transfer means 9. Remote control means 10
Instructs the ROM data read / write means 5 to read data. The ROM data read / write means 5 is PROMn.
Data is read from (n; 1 to 4). The data memory read / write means 8 writes the read data in the data memory 7. When the data reading is completed, the ROM data reading / writing means 5 notifies the remote control means 10 that the data reading is completed. The remote control means 10 transmits this to the external device 11. In step 22, the external device 11 detects the data in the data memory 7 and the PROM concerned.
In order to compare the ROM data in the remote control means 10,
Request data comparison. In response to this, the remote control means 1
0 instructs the ROM data comparison means 6. The ROM data comparing means 6 has a P value with respect to the ROM data reading / writing means 5.
The data reading from the ROM1 to 4 and the data reading / writing means 8 are instructed to read the data from the data memory 7, and the data of both are compared. When the data comparison is completed (when the coincidence of both data is known), the ROM data comparison means 6 notifies the remote control means 10 that the comparison is completed. The remote control means 10 transmits this to the external device 11. The processing is repeated for each of the PROMs 1 to 4 in the above procedure. (Repeat the processing for the number of PROMs.) In step 23, the external device 11 performs PR to transfer all the data read to the remote control means 10 to itself (external device 11).
Request the OM programmer 13. Thereby, the remote control means 10 instructs the data memory read / write means 8 to read data. The data memory read / write means 8 reads the data in the data memory 7, converts it into the data transfer record format shown in FIG. 7, and transfers it to the external device 11 via the data transfer means 9. When the transfer is completed, the data memory read / write means 8 notifies the remote control means 10 that the transfer is completed. Then, the remote control means 10 transmits this to the external device 11.

In step 24, when the series of processing is completed, the external device 11 requests the remote control means 10 to disconnect, and the remote control means 10 disconnects the communication between the PROM programmer 13 and the external device 11.

Next, the processing branched to the right side in the figure, that is, the operation for writing the data in the external device to the PROM will be described. In step 25, the external device 11 requests the remote control means 10 for data transfer via the data transfer means 9. The remote control means 10 instructs the data transfer means 9 to receive data from the external device 11, and instructs the data memory read / write means 8 to write data. The data transfer means 9 receives data, and the data memory read / write means 8 writes the received data in the data memory 7. When the data transfer is completed, the data memory read / write means 8 notifies the remote control means 10 that the data transfer is completed. Then, the remote control means 10 transmits this to the external device 11. In step 26, the external device 11
Requests the remote control means 10 to write to the PROMs 1 to 4. The remote control means 10 instructs the ROM data read / write means 5 to perform a data blank check (check whether there is a free storage area). The ROM data read / write means 5 performs a data blank check on the set PROMs 1 to 4, and the result is checked by the remote control means 1.
Tell 0. In step 27, in response to this, the remote control means 10 causes the data memory read / write means 8 to read the data in the data memory 7, and causes the ROM data read / write means 5 to write the data in the PROMs 1 to 4. Instruct. As a result, the ROM data read / write means 5 writes the data in the PROMs 1 to 4. When the writing is completed, the ROM data reading / writing means 5 notifies the remote control means 10 of the completion. The remote control means 10 transmits this to the external device 11. In step 28, the data in the data memory 7 and the PROM
The data in 1-4 are compared. Each PR in the above procedure
The process is repeated for each of the OM1 to OM4. (Repeat for the number of PROMs.)

When the series of processes is completed, the process of step 24 is performed as described above.

[0008]

Since the conventional memory data transfer device is constructed as described above, when transferring ROM data to an external device, all the data in different PROMs must be read and transferred. Therefore, there is a problem that the amount of data to be transferred increases and the data transfer time becomes long.

The present invention has been made in order to solve the above-mentioned problems, and allows a memory data (RO) to be sent to an external device.
When transferring (M data), it is possible to reduce the amount of data to be transferred by transferring data having contents corresponding to all the data of all different nonvolatile memories (PROM) without transferring the data. However, it is an object of the present invention to provide a memory data transfer device that can reduce the data transfer time.

[0010]

A memory data transfer device according to the present invention, when transferring data to an external device 11,
Non-volatile representative of the data when the data read from different non-volatile memories (PROM1 to 4) happen to have the same content and the storage locations are the same in address in the storage area of the non-volatile memory. Data compression means 12 for compressing transfer data by omitting data in a non-volatile memory other than the memory is provided between the data transfer means 9 and the data memory read / write means 8.

[0011]

When the data is transferred to the external device 11, the data compression means 12 happens to have the same contents of the data read from the non-volatile memory (PROM1) and the non-volatile memory (PROM2), and the storage location is the address. If they are the same, the data in the non-volatile memory (PROM2) is omitted, and the data in the non-volatile memory (PROM1) is transferred via the data transfer means 9. That is, the transfer data is compressed and transferred.

[0012]

1 is a block diagram showing the configuration of a PROM programmer as a memory data transfer device according to an embodiment of the present invention. In FIG. 1, components corresponding to those shown in FIG. 5 are designated by the same reference numerals, and their description will be omitted. In FIG. 1, when the data compressing means 12 transfers the data to the external device 11, the data read from different PROMs 1 to 4 happen to have the same content, and the storage location is addressable in the storage area on the PROM. When it is the same, the transfer data is compressed by omitting the data of the PROM other than the PROM representing the data, and it is provided between the data transfer means 9 and the data memory read / write means 8.

Next, the operation of this embodiment will be described with reference to FIG.
This will be described with reference to the flowchart shown in. The branch in the figure is provided for the purpose of explanation and is not the original function of the PROM programmer.

First, the PROM programmer 13 activates the remote control means 10. Since the external device 11 establishes communication with the PROM programmer 13, the PROM programmer 1
3 is requested to establish communication, and in response to this, the remote control means 10
Establishes communication with the external device 11 via the data transfer means 9 (step 20).

A process branched to the left side in FIG. 2, that is, PR
The operation of reading data from the OM and transferring the data to the external device 11 will be described. Read data from PROM (step 21) and compare data (step 22)
Performs the same operation as the conventional one. The external device 11 is
Request data transfer to the remote control means 10. The remote control means 10 instructs the data compression means 12 to perform data compression (step 30).

The data compression means 12 performs data compression according to the procedure shown in FIG. First, the data compression unit 12 instructs the data memory read / write unit 8 to read data. The data memory read / write means 8 reads data from the data memory 7. Which PROM the read data is
If it is the data in the PROM 1, the data is not compressed and the process of step 30f in FIG. 3 is performed (step 30a). If it is data other than PROM1, PRO that stores that data
The location (stored address) in M is calculated (step 30b). The data in the PROM at the calculated location is read out via the data memory read / write means 8 (step 30c). That is, the data is read from the same address of the PROM as that of the PROM1. Then, this data is compared with the data in the PROM 1 (step 30d). If both are the same, "1" is stored in the designated location in the data storage information (32-bit configuration) according to the data transfer record format shown in FIG. 4, and the data is omitted without being stored in the transfer record. (Step 30
e). That is, the transfer of one of the overlapping data is omitted. If they are not the same, "0" is stored in the designated location in the data storage information, and the data is stored in the transfer record (step 30f). The above process (steps 30a to 30f) is repeated 32 times. In this embodiment, one data transfer record is constructed for 32 pieces of data, and the head address information corresponds to the address in PROM1. This data compression is a method of creating a data transfer record while comparing 32 pieces of data in order from the head addresses of the PROMs 2 to 4 with the data in the PROM 1. In this data compression, when the data read from different PROMs happens to have the same content and the storage addresses are the same, the data of PROMs other than the PROM that represents the data is stored and only the representative data is stored. This is a process for transferring.

When one data transfer record is completed in this way, the data compression means 12 sends this record to the data transfer means 9 (step 23 in FIG. 2). This data transfer record has the above-mentioned data storage information when the data read from different PROMs have the same contents and the same storage address, and the amount of data at the time of data transfer is reduced. The data transfer means 9 transfers this data transfer record to the external device 11 (step 23). When the transfer is completed, the data memory read / write means 8 notifies the remote control means 10 that the transfer is completed. The remote control means 10 transmits this to the external device 11. Communication disconnection between PROM programmer 13 and external device 11 (step 24)
Performs the same operation as the conventional one.

In FIG. 2, the processing branched to the right side, that is, the operation for writing the data in the external device to the PROM has been described in the conventional example, and will be omitted here.

[0019]

As described above, according to the present invention, except that data read from different nonvolatile memories happens to have the same content and the storage locations are the same in address, the data is represented. Since the data compression means for compressing the transfer data by omitting the data is provided, a plurality of different non-volatile memories (PROM) are used when the memory data (ROM data) is transferred to the external device.
Even if you don't transfer all the data, you can transfer the data equivalent to all the data, which reduces the transfer data amount and the data transfer time, thus improving the data transfer efficiency with the external device. The effect of doing is obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a PROM programmer as a memory data transfer device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the PROM programmer according to this embodiment.

FIG. 3 is a flowchart showing a data compression process according to this embodiment.

FIG. 4 is a diagram showing a data transfer record format according to this embodiment.

FIG. 5 is a PROM as a conventional memory data transfer device.
It is a block diagram which shows the structure of a programmer.

FIG. 6 is a flowchart showing the operation of this conventional PROM programmer.

FIG. 7 is a diagram showing a data transfer record format according to this conventional example.

[Explanation of symbols]

 1-4 PROM (nonvolatile memory) 7 data memory 8 data memory read / write means 9 data transfer means 11 external device 12 data compression means

Claims (1)

[Claims] 1. A data memory for storing data to be read from a non-volatile memory and to be transferred to an external device or data transferred from an external device, and the non-volatile for the data memory. Data memory read / write means for writing data read from the memory, reading the data at the time of transfer, and writing data transferred from the external device, and data read by the data memory read / write means In a memory data transfer device having a data transfer means for transferring data to an external device or for giving data transferred from the external device to the data memory read / write means, a different nonvolatile memory is used when transferring data to the external device. Data read from the local memory happens to have the same content, and the storage location is The data transfer means is a data compression means for compressing transfer data by omitting data in a non-volatile memory other than the non-volatile memory representing the data when the addresses are the same in the storage area of the memory. And a data memory read / write means provided between the memory data transfer device.