TWI707350B - Operation method of one-time programming read-only memory, processor chip and information processing device - Google Patents

Abstract

The present invention mainly discloses an operation method of one-time programming read-only memory, which is used to divide a storage space of one-time programming read-only memory into a header storage block and a data storage block. When executing the data writing process, by making a data packet include at least one first bit, at least one second bit, and a data byte, the first bit can be used to indicate whether a data storage unit has been The same data byte group is stored, and the second bit is used to indicate whether the data byte group contained in the data packet is correctly written into the data storage unit. In the case of applying the operating method of the present invention, the utilization rate of the read-only memory for one-time programming can be effectively improved, the correctness of the written data is ensured, the same data byte group will not be repeatedly programmed, and at the same time Shorten the time to read and write data.

Description

Operation method of one-time programming read-only memory, processor chip and information processing device

The present invention relates to the technical field of read and write operations of non-volatile memory, and particularly refers to an operation method for programming read-only memory once.

With the widespread use of 3C electronic products, manufacturers are paying more and more attention to the safety protection of independently developed electronic products. For example, in order to protect the data in the processor chip, manufacturers usually set up One Time Programmable Read Only Memory (OTPROM) in the processor chip to store at least one secret key (root key), a public key, and/or a chip ID (chip ID). At present, the one-time programming read-only memory is also used in various sensor chips mounted on smart phones, so as to store relevant parameters for correcting and/or trimming the analog circuit of the sensor chip. On the other hand, one-time programmable read-only memory is also used in smart phones to indicate the software update level of the smart phone's operating system.

The programming process of OTP read-only memory is an irreversible destructive activity, and data is only allowed to be written once. Generally speaking, the bits recorded by each memory cell in each storage block of the OTP read-only memory in the initial state are the same, for example, all bits are "0". After a one-time data programming (write) process is performed on the OTP read-only memory using a read-write control chip, the bits of multiple memory cells in the specified memory block can be reset from "0" Rewritten as "1".

Compared with rewritable memory, OTP read-only memory has the advantages of lower manufacturing cost and less easy loss of stored data. However, OTP read-only memory can only perform one-time data programming. In more detail, once the bits of the specific memory cells in the designated storage block are rewritten through the one-time data write procedure, the specific memory cells in the designated storage block cannot be rewritten. Perform data programming again.

In the prior art, the utilization of the OTP read-only memory is improved by partition programming, so as to prevent the OTP read-only memory from being unable to program data again after a data programming error. However, since the correctness of the programming data of each storage block cannot be guaranteed and the same data is prevented from being programmed into different storage blocks at the same time, the utilization rate of the OTP read-only memory that can be programmed by partition in the prior art is still Needs to be improved, and also has the defect of too long read and write time.

It can be seen from the above description that there is an urgent need in the art for a new one-time programming read-only memory operation method that can improve the utilization rate and ensure the correctness of the programming data.

The main purpose of the present invention is to provide an operating method for one-time programming read-only memory, thereby effectively improving the utilization rate of any existing one-time programming read-only memory, so that the utilization rate is 100% under ideal conditions.

Another object of the present invention is to provide a one-time programming read-only memory operation method, so that the data writing accuracy of the one-time programming read-only memory, so that the same data will not be repeatedly written into the one-time programming only Read the memory and shorten the read/write time of the one-time programming read-only memory.

To achieve the above objective, the present invention proposes an embodiment of the operating method of the one-time programming read-only memory, including:

An initialization procedure, including the following steps:

A storage space of a one-time programmable read-only memory is divided into a header storage block and a data storage block, wherein the data storage block includes a plurality of data storage units, and the header storage block includes a plurality of numbers Each table header storage unit corresponds to the plurality of data storage units; and

A data writing procedure includes the following steps:

Write a data packet including at least one first bit, at least one second bit, and a data byte group to be written, wherein the first bit is used to indicate whether a data storage unit has stored a data bit Tuple, and the second bit is used to indicate whether the data byte is written correctly;

The data byte group is read from one of the data storage units, and when the data byte group to be written is inconsistent with the data byte group, the first bit contained in the data packet is The element and the data byte group to be written are written into the header storage unit and the data storage unit respectively; and

Repeatedly read the data bytes from the data storage unit, and when the read data bytes are consistent with the aforementioned data bytes to be written, the data contained in the data packet The second bit is written into the header storage unit.

In one embodiment, the operating method of the one-time programming read-only memory of the present invention further includes a data reading program, which includes the following steps:

Read the first bit and the second bit from the header storage unit; and

When it is confirmed that the write time of the data byte is the latest according to the first bit and the second bit, the data byte is read.

In one embodiment, the one-time programming read-only memory is a fuse type one-time programming read-only memory, and before the first bit and the second bit are written into the header storage unit, First, set the bit value of the first bit and the second bit to 1.

In one embodiment, the one-time programming read-only memory is an anti-fuse type one-time programming read-only memory, and before the first bit and the second bit are written into the header storage unit , First set the bit value of the first bit and the second bit to 0.

The present invention also provides a processor chip with a data read/write unit to perform the one-time programming read-only memory operation method of the present invention as described above.

The present invention also provides an information processing device, which has a processor chip, and the processor chip has a data reading and writing unit to execute the one-time programming read-only memory operation method of the present invention as described above.

In possible embodiments, the aforementioned information processing device may be a smart phone, a tablet computer, a notebook computer, a desktop computer, a server computer, an industrial computer, an all-in-one computer, a fingerprint punching device, an access control device, or an analog signal Measuring device.

In order to enable your reviewer to further understand the structure, features, purpose, and advantages of the present invention, the drawings and detailed descriptions of preferred specific embodiments are attached as follows.

FIG. 1 shows a structure diagram of a processor chip 1 and a one-time programming read-only memory 2 using the operating method of a one-time programming read-only memory of the present invention. In addition, FIG. 2 shows a flow chart of an operating method of one-time programming read-only memory of the present invention. The operating method of the one-time programming read-only memory of the present invention mainly includes three execution steps, namely step S1: initialization procedure, step S2: data writing procedure, and step S3: data reading procedure.

Before performing read/write operations on the one-time programming read-only memory 2, the processor chip 1 first uses a data reading and writing unit 11 of the one-time programming read-only memory 2 according to the operating method of the present invention. Initialization is performed, that is, step S1: initialization procedure is performed. When performing initialization, a storage space of the one-time programming read-only memory 2 is divided into a header storage block 21 and a data storage block 22, wherein the data storage block 22 includes a plurality of The data storage unit 221, and the header storage block 21 includes a plurality of header storage units 211 to correspond to the plurality of data storage units 221 respectively.

After the step S1 is completed, the processor chip 1 can then use the data reading and writing unit 11 to perform the data writing procedure on the one-time programmable read-only memory 2 according to the operating method of the present invention, that is, execute step S2. When executing the data writing program, first write a data packet including at least one first bit, at least one second bit, and a data byte to be written, wherein the first bit is used to represent one of the data Whether the storage unit 221 has stored a data byte, and the second bit is used to indicate whether the data byte is written correctly. Then, the data read/write unit 11 of the processor chip 1 reads the data byte from one of the data storage units 221, and when the data byte to be written is inconsistent with the data byte , Writing the first bit contained in the data packet and the data byte group to be written into the header storage unit 211 and the data storage unit 221, respectively.

In more detail, when the data byte group to be written is inconsistent with the data byte group, it means that the data storage unit 221 does not store the same data as the data byte group to be written. Byte; at this time, before writing the first bit to the header storage unit, the processor chip 1 will first set the bit value of the first bit to 1, and then write it and The data storage unit 221 corresponds to one of the header storage units 211. It is added that if the One Time Programmable Read Only Memory (OTPROM) 2 is a fuse type OTPROM, the processor chip 1 will set the first bit The bit value is set to 1. Conversely, if the one-time programming read-only memory 2 is an anti-fuse type OTPROM, the processor chip 1 will set the bit value of the first bit to 0, and then set It is written into the header storage unit 211 to indicate that the corresponding data storage unit 221 has stored one data byte group.

After the first bit of the data packet and the data byte to be written are written into the one-time programming read-only memory 2, according to the operating method of the present invention, the processor chip 1 uses the data The read-write unit 11 repeatedly reads the data byte from the data storage unit 221, and when the read data byte is consistent with the aforementioned data byte to be written, the data packet The included second bit is written into the header storage unit 211. In more detail, when the data byte that has been stored is consistent with the unstored data byte to be written, it means that the data byte stored in the data storage unit 221 is Correct; at this time, before writing the second bit to the header storage unit, the processor chip 1 will first set the bit value of the second bit to 1, and then write it to the The data storage unit 221 corresponds to one of the header storage units 211. It is added that if the one-time programming read-only memory 2 is a fuse type OTPROM, the processor chip 1 will set the bit value of the second bit to 1. On the contrary, if the one-time programming read-only memory 2 is an anti-fuse OTPROM, the processor chip 1 will set the bit value of the first bit to 0, and then write it into the header The storage unit 211 indicates that the data byte group stored in the corresponding data storage unit 221 is written correctly.

After completing the data writing procedure, according to the operating method of the present invention, the processor chip 1 can execute step S3: data reading procedure with its data reading and writing unit 11, thereby reading all data from the meter storage unit 211 The first bit and the second bit, and confirming that the write time of the data byte stored in the data storage unit 221 corresponding to the first bit and the second bit is the latest In this case, the data byte group is read from the data storage unit 221 to complete the data reading procedure.

In this way, the above has completely and clearly explained a one-time programming read-only memory operation method of the present invention; and from the above, it can be seen that the present invention has the following advantages:

(1) The present invention discloses a one-time programming read-only memory operation method, which is used to divide a storage space of the one-time programming read-only memory into a header storage block and a data storage block. When executing the data writing process, by making a data packet include at least one first bit, at least one second bit, and a data byte, the first bit can be used to indicate whether a data storage unit is The same data byte group is stored, and the second bit is used to indicate whether the data byte group contained in the data packet is correctly written into the data storage unit. Therefore, when the operating method of the present invention is applied, the utilization rate of the read-only memory for one-time programming can be effectively improved, the correctness of the written data can be ensured, and the same data byte group will not be repeatedly programmed, and at the same time It can also shorten the time to read and write data.

(2) The present invention also provides a processor chip with a data read/write unit for executing the one-time programming read-only memory operation method of the present invention as described above.

(3) In addition, the present invention also provides an information processing device, which has a processor chip, and the processor chip has a data read and write unit for executing the one-time programming read-only memory of the present invention as described above Method of operation.

(4) In feasible embodiments, the aforementioned information processing device of the present invention may be a smart phone, a tablet computer, a notebook computer, a desktop computer, a server computer, an industrial computer, an all-in-one computer, and a fingerprint punching device , Access control device or analog signal measuring device.

It must be emphasized that the foregoing disclosures in this case are preferred embodiments, and any partial changes or modifications that are derived from the technical ideas of this case and are easily inferred by those who are familiar with the art will not deviate from the patent of this case. Right category.

In summary, regardless of the purpose, means and effects of this case, it is shown that it is very different from the conventional technology, and its first invention is suitable for practicality, and it does meet the patent requirements of the invention. Please check it out and grant the patent as soon as possible. Society is for the best prayer.

<The present invention> 1: processor chip 11: Data reading and writing unit 2: One-time programming read-only memory 21: header storage block 211: header storage unit 22: Data storage block 221: data storage unit S1: Initialization program S2: Data writing program S3: Data reading program

＜Acquaintances＞ no

Figure 1 is a diagram showing the architecture of a processor chip and a one-time programming read-only memory using a one-time programming read-only memory operating method of the present invention; and Fig. 2 is a flow chart of an operating method of one-time programming read-only memory according to the present invention.

S1: Initialization program

S2: Data writing program

S3: Data reading program

Claims (7)

An operating method for one-time programming read-only memory includes: an initialization procedure, including the following steps: dividing a storage space of a one-time programming read-only memory into a header storage block and a data storage block, The data storage block includes a plurality of data storage units, and the header storage block includes a plurality of header storage units to correspond to the plurality of data storage units respectively; and a data writing procedure includes the following steps: writing A data packet including at least one first bit, at least one second bit, and a data byte group to be written, wherein the at least one first bit is used to indicate whether the plurality of data storage units have been stored A data byte, and the second bit is used to indicate whether the data byte is written correctly; the data byte is read from the plurality of data storage units, and the data to be written When the byte and the data byte are inconsistent, the at least one first bit contained in the data packet and the data byte to be written are written into the header storage units and the Among a plurality of data storage units; and repeatedly reading the data bytes from the plurality of data storage units, and the read data bytes are consistent with the aforementioned data bytes to be written In this case, the at least one second bit contained in the data packet is written into the header storage units. The operating method of one-time programming read-only memory as described in item 1 of the scope of patent application further includes a data reading program, which includes the following steps: reading the at least one first bit from the header storage units And the at least one second bit; and when it is confirmed that the write time of the data byte is the latest according to the at least one first bit and the at least one second bit, the data Byte readout. The operating method of one-time programming read-only memory as described in item 1 of the scope of patent application, wherein the one-time programming read-only memory is a fuse type one-time programming read-only memory, and the Before the at least one first bit and the at least one second bit are written into the header storage units, the bit values of the at least one first bit and the at least one second bit are first set Is 1. One-time programming of read-only memory operation as described in item 1 of the scope of patent application A method, wherein the one-time programming read-only memory is an anti-fuse type one-time programming read-only memory, and the at least one first bit and the at least one second bit are written into the Before these header storage units, the bit values of the at least one first bit and the at least one second bit are set to zero. A processor chip has a data read-write unit for executing the one-time programming read-only memory operation method as described in any one of items 1 to 4 of the scope of patent application. An information processing device, which has a processor chip, and the processor chip has a data read-write unit for executing the one-time programming read-only as described in any one of items 1 to 4 of the scope of patent application How to operate the memory. For example, the information processing device described in item 6 of the scope of patent application is selected from smart phones, tablet computers, notebook computers, desktop computers, server computers, industrial computers, all-in-one computers, and fingerprint punching An electronic device in the group consisting of devices, access control devices, and analog signal measurement devices.

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