JP2005327078A - Register setting method and register setting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a register setting method and a register setting device, allowing efficient execution of various functions of an LSI. <P>SOLUTION: This register setting device has: a function device group; a setting register group having setting registers each for operating a function device; a multiple-register lump-sum setting register becoming an opportunity to set the setting register group in a lump; an EX controller setting initial values to the setting register group according to an output value of the multiple-register lump-sum setting register; and an initial value holding device connected to the multiple-register lump-sum setting register, holding the initial values of the plurality of registers provided inside the setting register group. The lump-sum setting register is software-accessed, and an initial value group is selected from the initial value holding device. By setting the initial value group to the plurality of setting registers in a lump, operation is speeded up. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an LSI register setting method and a register setting apparatus.

  Conventionally, a large-scale system LSI is connected to a plurality of external modules, and has a plurality of functions including control of these external modules. In order to realize various functions of the LSI including the control of the external module, many register settings by software control are required. In particular, some of the external modules connected to the system LSI do not operate unless a register is set by inputting a signal from the system LSI. Therefore, it is necessary to set a large number of registers. .

  For example, an LSI in which a TD (Transport Decoder) that converts the format of data input from an antenna, an AV decoder that demodulates the converted data, and a CPU is conventionally known is known. In such a large-scale LSI, for example, in order to connect a PC card as an external module (external device) of the LSI and perform AV decoding using the PC card, a shared setting for using the PC card, PC Settings relating to the AC specifications (AC characteristics) of the card, TD settings, AV decoders, and the like are required, and these functional block settings require several tens of register accesses.

FIG. 7 is a diagram showing a functional device group 101 and a setting register group 100 in a conventional LSI. In this conventional example, an arbitrary register in the setting register group 100 is assigned to the setting of an arbitrary function in the functional device group 101. When various functions of the LSI are used, the registers individually provided for each of the plurality of functions are accessed once and set in order. At this time, for example, when a PC card is used as an external module, the registers in the setting register group 100 are accessed by software several tens of times. In this case, for example, it may be necessary to change the value of VPP to a value different from that at the time of activation depending on the register value in the PC card. For this reason, there is a case where the PC card cannot be used depending on the VPP value (see Patent Document 1). Accordingly, in order to realize AV decoding using a PC card, it is necessary to determine whether or not the PC card connected to the LSI is a usable device. It is always necessary to perform pre-processing by software control of reading and determining through the LSI. When such control is performed, software access to the LSI increases. Further, since there are various AC spec cards in the PC card (see Non-Patent Document 1), it is necessary to control the AC spec of the LSI in accordance with the standard defined in the AC spec of the PC card to be used. . For this reason, conventionally, whenever the type of PC card or the type of access is changed, the AC specification must be reset to an optimum value for a signal to be communicated with the LSI PC card. In the prior art, a unit operation for setting a single initial value is repeated for this problem (see Patent Document 1).
PC Card Standard Release 8.0 JEITA / PCMCIA JP2003-162497

  According to the above-described conventional technology, setting across a large number of LSI function blocks is required for each function, so that the performance as a system deteriorates in an application that needs to be changed as needed. Even at the time of startup, register setting by many software accesses is necessary, so that the time required for startup becomes longer.

  In the conventional system configuration, as described above, when using various functions of the LSI, it is necessary to access the registers individually possessed for each of the plurality of functions at a time and to perform setting in order. Software access existed. For this reason, it is easy to make a setting mistake when creating a function evaluation of LSI or creating software to be mounted on a product, debugging efficiency is deteriorated, and it is difficult to sufficiently improve development efficiency.

  In view of the above problems, an object of the present invention is to provide an LSI register setting method and a register setting apparatus that efficiently execute various functions of an LSI.

  The register setting method of the present invention includes a functional device group having a plurality of functional devices, a setting register group having a plurality of registers for operating each functional device in the functional device group, and the setting register group collectively set. Register setting using a register setting device provided with an LSI provided with a plurality of register batch setting registers that triggers and an EX controller that sets initial values in the setting register group in accordance with signals from the plurality of register batch setting registers A step (a) of causing the EX controller to select an initial value to be set in the plurality of registers by performing one software access to the plurality of register batch setting registers; and The initial values selected in step (a) are collectively set in the plurality of registers. And a step (b) to.

  By this method, the initial values can be set in a plurality of registers at once, so that the number of times of software access can be greatly reduced compared to the conventional setting method, and processing when executing various functions of the LSI. Can be reduced. Further, since software access at the time of register setting is small, the time required for activation can be shortened, and the operation of the system can be speeded up. Furthermore, according to the register setting method of the present invention, it is possible to prevent a setting error when LSI function evaluation and software to be loaded on a product are created, and to improve debugging efficiency.

  For security reasons, the register setting method of the present invention further includes a step of storing the encrypted initial value data in the initial value holding device and a step of decrypting the initial value data read from the initial value holding device. preferable.

  When the register setting method of the present invention further includes a step of storing the compressed initial value data in the initial value holding device and a step of expanding the initial value data read from the initial value holding device, Since the capacity is small, the size of the register setting device can be reduced.

  The register setting method of the present invention can be preferably used to realize various functions using an external device such as a PC card.

  The register setting device of the present invention includes a functional device group having a plurality of functional devices for executing a function, a setting register group having a plurality of registers for operating each functional device in the functional device group, The initial value can be set collectively to a plurality of setting registers in the setting register group according to a signal from a plurality of register setting registers that trigger the setting register group and a plurality of register setting registers. An LSI provided with an EX controller is provided.

  By using the register setting device of this configuration, it is possible to set the initial values in a plurality of registers at the same time. Therefore, when a computer or the like executes a plurality of functions using an external device, compared with the conventional setting method. Thus, the number of times of software access can be greatly reduced, and the processing in the LSI can be reduced. Further, since software access at the time of register setting is small, the time required for activation can be shortened, and the operation of the system can be speeded up. Furthermore, according to the register setting method of the present invention, it is possible to prevent a setting error when LSI function evaluation and software to be loaded on a product are created, and to improve debugging efficiency.

  Also, an interface for an external device through which the register treatment device exchanges information with the external device, a CIS analysis mechanism for analyzing the CIS information of the external device, and an analysis for storing the analysis result in the CIS analysis mechanism If equipped with a result storage device and an AC spec analysis device, various functions including an extended function using an external device that needs to determine the specifications by analyzing CIS information and AC specs such as a PC card Can be realized.

  According to the register setting method and register setting apparatus of the present invention, software access is reduced and high-speed function switching is realized by greatly reducing the number of accesses, thereby improving the overall performance. In addition, since many settings can be omitted, setting errors and the like are reduced, and software development efficiency is increased.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram showing an outline of a register setting method according to the first embodiment of the present invention, and FIG. 2 is a diagram showing a schematic configuration of a register setting apparatus according to the first embodiment.

  In the example shown in FIG. 1, it is assumed that a total of five registers to be set are provided in the LSI from register A to register E. In the register setting device of the present embodiment, a multiple register batch setting register 20 that is controlled by software and can set the registers A to E in a batch is provided. The setting register group, the collective setting register 20, and the functional device group 11 may be in one LSI or in separate LSIs.

  As shown in FIG. 2, the register setting device of the present embodiment includes a functional device group 11 including a plurality of types of functional devices, and a setting provided for each functional device and having a setting register for operating the functional device. The register group 10, the multiple register batch setting register 20 that triggers the batch setting of the setting register group 10, and an EX (External module) controller that sets an initial value in the setting register group 10 according to the output value of the multiple register batch setting register 20 (Indicated as “EXCTL” in FIG. 2) 30 and an initial value holding device 40 connected to the plurality of register batch setting registers 20 and holding the initial values of the plurality of registers provided in the setting register group 10. Yes. The initial value holding device 40 may be provided in the same LSI as the LSI in which the functional device group 11 is provided, or may be provided outside the LSI in which the functional device group 11 is provided.

  The setting register group 10 is provided with setting registers necessary for realizing all the functions of the LSI. The functional device that can be used is determined by which register in the setting register group 10 is set.

  The initial value holding device 40 stores a plurality of initial values to be set in, for example, all the registers included in the setting register group 10.

  In the register setting device of the present embodiment, the multiple register batch setting register 20 is externally accessed once by software to determine the output value of the multiple register batch setting register 20. Then, the EX controller 30 that fetches data from the initial value holding device 40 reads data at an address address determined by the value stored in the multiple register batch setting register 20 in the initial value holding device 40. Further, the EX controller 30 collectively stores predetermined values in a plurality of registers in the setting register group 10. The functional device in the functional device group 11 determines the function of the LSI to be used based on the value stored in the register in the setting register group 10. Therefore, when the registers A to E are included in the setting register group 10 as shown in FIG. 1, the conventional method requires five software accesses to set the registers. In this method, the register can be set by two software accesses ((1) and (2) in FIG. 1).

  Next, the configuration of the EX controller will be described.

  FIG. 3 is a block diagram showing the configuration of the EX controller 30 in the register setting device. As shown in the figure, the EX controller 30 is stored in the initial value holding device 40 and the DMA controller 31 (direct access device, referred to as “DMACTL” in FIG. 3) that reads data from the initial value holding device 40. A compressed data decompression device 33 that decompresses the data sequence when the data sequence being compressed is encrypted, and an encryption that decrypts the data sequence when the data sequence stored in the initial value holding device 40 is encrypted And a decoding device 32. The compressed data decompression device 33 can also compress a data string acquired from outside the LSI.

  By adopting such a mechanism, the capacity of the data string stored in the initial value holding device 40 can be reduced, and security when the initial value holding device 40 is outside the LSI can be enhanced.

  Next, FIG. 4 is a block diagram showing a modification of the register setting device of the present embodiment when the initial value holding device 40 is provided outside the LSI. Here, the initial value holding device 40 may be a ROM, and is preferably a rewritable ROM such as an FPGA (field-programmable gate array) or a flash memory. In addition to the register setting device shown in FIG. 2, the register setting device of the present modification receives a ROM baking machine 60 for writing data to the initial value holding device 40 and data to be written to the initial value holding device 40. The interface 50 is further provided. The interface 50 includes a data communication network receiving device, an antenna, and the like.

  Further, the EX controller 30 of this modification example temporarily holds the write data received by the interface 50 in addition to the DMA controller 31, the compressed data decompression device 33, and the encryption / decryption device 32 shown in FIG. The SRAM 35 has a controller 34 (denoted as “CTL” in FIG. 4) for controlling the communication (transmission / reception) via the interface 50 as well as controlling the ROM baking machine 60. Here, instead of the SRAM 35, a RAM such as a DRAM may be used.

  According to the configuration of the present modification shown in FIG. 4, the initial value necessary for setting a plurality of registers for determining a plurality of function groups in a batch is set according to the user's specifications or a bug or the like. In order to cope with this, it is possible to change the method according to the time zone when the user is not using it.

  Further, in the register setting device of this modification, the compressed data decompressing device 33 and the encryption / decryption device 32 are provided, so that the initial value received for storing in the ROM (initial value holding device 40) is compressed. And encrypted and transmitted to the ROM baking machine 60. Further, the DMA controller 31 is provided with a mechanism for storing the most frequently used batch setting value and all other individual settings performed within an arbitrary time after the batch setting is performed, and the stored value is stored in the ROM initial value. If this is reflected, it is possible to further improve the efficiency of software access. When the reset key is received by the interface 50, the controller 34 may activate the ROM baking machine 60 by this reset key, and the initial value storage device 40 may be rewritten with optimum initial value information.

  In the register setting device shown in FIGS. 3 and 4, the initial value holding device 40 may be provided inside the LSI, or may be provided outside the LSI. When the initial value holding device 40 is provided inside the LSI, it is possible to reduce the manufacturing cost because it is possible to reduce the number of externally connected components. On the other hand, when the initial value holding device 40 is provided outside the LSI, there is an advantage that the design for changing the initial value set first is easier than when the initial value is set inside the LSI. is there.

  Next, a data processing procedure in the register setting device shown in FIGS. 2, 3, and 4 will be described.

  FIG. 5 is a flowchart showing a data processing procedure in the register setting device of the present embodiment and its modification.

  First, in step S1, the register setting device determines whether or not the initial value held by the initial value holding device needs to be changed. If a change is necessary, the process proceeds to step S11, and if not necessary, the process proceeds to step S2.

  Next, in step S2, it is determined whether or not an LSI is used. If an LSI is used, the process proceeds to step S3. If not used, the process proceeds to step S10.

  Subsequently, in step S 3, upon receiving a software instruction, the CPU accesses the plurality of register batch setting registers 20 and selects an initial value group to be set in the plurality of setting register groups 10. Here, the “initial value group” means a set of initial values to be set in a plurality of registers in the setting register group 10.

  Next, in step S4, the register setting device determines whether or not the initial value group selected in step S3 is encrypted. If the initial value group is encrypted, the process proceeds to step S5, the initial value group is decrypted by the encryption / decryption device 32, and the process proceeds to step S6. If the initial value group is not encrypted, the process proceeds to step S6 without passing through step S5.

  Next, in step S6, it is determined whether or not the initial value group selected in step S3 is compressed data. If the initial value group is compressed data, the process proceeds to step S7, and the compressed data decompression device 33 decompresses the initial value group data. Thereafter, the process proceeds to step S8. On the other hand, if the initial value group is not compressed data, the process proceeds to step S8 without passing through step S7.

  Subsequently, in step S8, the EX controller 30 individually sets a single register. Thereby, it is possible to cope with a case where a partial change of the register setting is necessary. Depending on the user's instruction and data set, setting changes are often required during the operation of the LSI, so the effect of individually setting the registers is great.

  Next, in step S9, it is determined whether or not the register setting needs to be adjusted. If it is determined that it is necessary, step S8 is performed again. If no adjustment is required, the process proceeds to step 10 to finish the register setting. In this step (step 10), the batch setting value for which the initial value holding device is selected is memorized.

  On the other hand, if it is necessary to change the initial value group in step S1, the process proceeds to step S11 to determine whether or not the initial value data is compressed and distributed. If it is compressed distribution, the process proceeds to step S12 to compress the initial value group and then proceeds to step S13. On the other hand, if it is not compressed distribution, the process proceeds to step S13. When it is determined that it is necessary to change the initial value group, it is possible to download better initial values or information by distributing the information to the external center via the network.

  Next, in step S13, it is determined whether or not the initial value group is encrypted. If the initial value group is encrypted and distributed, the process proceeds to step S14; otherwise, the process proceeds to step S15.

  Next, in step S15, the controller 34 distributes the initial value group to the support center such as a customer center outside through the interface 50, and the controller 34 receives the initial value group through the interface 50.

  Next, in step 16, the initial value group data received from the outside is temporarily stored in a RAM or the like, and it is determined whether or not the transmitted data is encrypted. For example, the received data usually has a header, and the data format can be determined from the header.

  Subsequently, in step S17, the compressed data decompression device 33 of the EX controller 30 decompresses the received initial value group. The encryption / decryption device 32 decrypts the initial value group. However, in this step, the initial value group may pass through the EX controller.

  Next, in step S18, the EX controller in the LSI determines whether or not the received initial value data is compressed.

  In step S19, the compressed data decompression device 33 decompresses the initial value group, and the encryption / decryption device 32 decrypts the initial value group.

  Next, an initial value group is stored in the initial value holding device 40 in step S20. After this process, the process returns to step S1 again, and the process is repeated. The register setting method of this embodiment is executed by the above procedure.

  According to the register setting method of the present embodiment, a predetermined value can be set collectively for a plurality of registers in the LSI, so the number of times of software access can be greatly reduced compared to the conventional setting method, Processing when executing various functions of the LSI can be reduced. Further, since software access at the time of register setting is small, the time required for activation can be shortened, and the operation of the system can be speeded up. Furthermore, according to the register setting method and the register setting apparatus of the present embodiment, it is possible to prevent a setting error when LSI function evaluation and software to be loaded on a product are created, and to improve debugging efficiency.

  In the above register setting method, the register setting is changed using a value received from the outside. However, the register setting may be changed by CPU access by a software instruction to the CPU.

(Second Embodiment)
FIG. 6 is a block diagram showing a schematic configuration of a register setting device according to the second embodiment of the present invention. In the figure, the same components as those of the register setting device of the first embodiment are denoted by the same reference numerals.

  As shown in FIG. 6, the register setting device of the present embodiment includes a functional device group 80 (“PCCard Module” in FIG. 6) including a plurality of types of functional devices for PC cards, and a function device for operating the functional devices. A setting register group 10 having a setting register, a multi-register batch setting register 20 that triggers batch setting of the setting register group 10, and an EX that sets an initial value in the setting register group 10 according to an output value of the multi-register batch setting register 20 The controller 30 includes an initial value holding device 40 that is connected to the multiple register batch setting register 20 and holds initial values of a plurality of registers provided in the setting register group 10. The register setting device of this embodiment can realize various functions by connecting a PC card 70 (external device) having the CIS register group 71 to the outside of the LSI.

  The functional device group 80 includes an interface 81 (PCCard IF in FIG. 6) for exchanging information with the PC card 70, and a CIS for analyzing CIS information (for example, card specifications) held by the PC card 70. An analysis mechanism 82; an analysis result storage device 83 for storing the analysis result of CIS information; and an AC specification analysis device 84 for analyzing AC specification information such as attribute memory access, common memory access, and IO access of a PC card. Have. Although not shown, a spec holding unit for holding the spec information of the PC card analyzed by the AC spec analyzing device 84 may be provided in the LSI.

  With respect to the LSI of FIG. 6, when register setting is performed for the PC card 70, communication with the PC card becomes possible through the LSI. Here, when the PC card 70 is inserted into the slot, the pin (Card Detect) pin of the PC card 70 becomes the ground potential. To do. At this time, the register 81 in the CIS register group 71 is read from the interface 81 to the PC card 70. At this time, the AC spec analyzer 84 first measures the AC spec, and the register setting is changed in accordance with the AC spec of the PC card 70 based on the measurement result. The value read from the CIS register is sent to the CIS analysis mechanism 82, and the result analyzed by the CIS analysis mechanism 82 is notified via the analysis result storage device.

  For example, when the VPP value of the PC card 70 is determined from the analysis result, the information is stored in the analysis result storage device 83, and at the same time, a signal notifying completion of analysis is generated.

  According to the register setting device of the present embodiment, registers in the setting register group 10 for operating functional devices such as the interface 81, the CIS analysis mechanism 82, the analysis result storage device 83, and the AC specification analysis device 84 are stored once. Since it can be set by software access, useless software access can be suppressed and processing time can be shortened.

  Since the software only performs the operation of reading the stored data as described above, the register setting device of the present embodiment is rationalized as a system. That is, according to the register setting device of the present embodiment, unnecessary software access is not required, high-speed processing at the time of evaluation is possible, and development man-hours can be reduced.

  The register setting device and the register setting method of the present invention are for causing an LSI connected to an external module to exhibit various functions, and can be used for electronic devices such as computers that execute various functions.

It is a block diagram which shows the outline | summary of the register setting method which concerns on the 1st Embodiment of this invention. It is a figure which shows schematic structure of the register | resistor setting apparatus which concerns on 1st Embodiment. It is a block diagram which shows the structure of EX controller among the register setting apparatuses which concern on 1st Embodiment. It is a block diagram showing a modification of the register setting device of the first embodiment when the initial value holding device is provided outside the LSI. It is a flowchart figure which shows the data processing procedure in the register setting apparatus which concerns on 1st Embodiment, and its modification. It is a block diagram which shows schematic structure of the register | resistor setting apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows the functional apparatus group and setting register group in the conventional LSI.

Explanation of symbols

10 Setting Register Group 11 Functional Device Group 20 Multiple Register Batch Setting Register 30 EX Controller 31 DMA Controller 32 Encryption / Decryption Device 33 Compressed Data Expansion Device 34 Controller 35 SRAM
40 Initial value holding device 50, 81 Interface 60 ROM baking machine 70 PC card 71 CIS register group 80 Functional device group 82 CIS analysis mechanism 83 Analysis result storage device 84 AC spec analysis device

Claims (21)

A functional device group having a plurality of functional devices, a setting register group having a plurality of registers for operating each functional device in the functional device group, and a multiple register batch setting that triggers batch setting of the setting register group A register setting method using a register setting device including an LSI provided with a register and an EX controller for setting an initial value in the setting register group according to a signal from the multiple register batch setting register,
By performing one software access to the multiple register batch setting register,
A step (a) for causing the EX controller to select initial values to be set in a plurality of the registers;
A register setting method including a step (b) in which the EX controller collectively sets the initial values selected in the step (a) in the plurality of registers. The register setting method according to claim 1,
The register setting further includes a step (c) of individually changing the setting of one register in the setting register group when the setting change of the register is necessary after the step (b). Method. In the register setting method according to claim 1 or 2,
The register setting device further includes an interface for acquiring information from the outside, and an initial value holding device for holding an initial value for setting the register.
Obtaining an initial value for setting the register from the outside through the interface (d);
A register setting device further comprising a step (e) of writing an initial value group, which is a set of initial values acquired in the step (d), to the initial value holding device. The register setting method according to claim 3,
The initial value group held in the initial value holding device is encrypted,
The register setting method further comprising the step (a2) of decoding the initial value selected in the step (a) by the EX controller after the step (a) and before the step (b). . The register setting method according to claim 4,
A step (f) in which the EX controller encrypts the initial value data obtained in the step (d);
In the step (e), the register setting method of writing the encrypted initial value data into the initial value holding device. In the register setting method according to any one of claims 3 to 5,
The initial value selected by the EX controller in step (a) is compressed data,
The register setting method, further comprising a step (a3) in which the EX controller extends the initial value selected in the step (a) after the step (a) and before the step (b). The register setting method according to claim 6,
A step (g) in which the EX controller compresses the initial value data acquired in the step (d);
In the step (d), the register setting method of writing the compressed initial value group data into the initial value holding device. The register setting method according to claim 3,
A step (h) of extracting a value set in the register set in the step (c);
Comparing the value extracted in step (h) with the initial value group held by the initial value storage device, and determining whether or not the initial value group held by the initial value storage device can be changed based on the comparison result (I) and
A register that further includes a step (j) of transmitting the comparison result obtained in step (i) to the outside when it is determined in step (i) that the initial value group can be changed. Setting method. The register setting method according to claim 8,
The register setting method, wherein the comparison result transmitted to the outside in the step (j) is transmitted after being compressed and encrypted by the EX controller. In the register setting method according to any one of claims 3 to 9,
The register setting device further includes a direct access device for taking an initial value into the value of the setting register group,
A register setting method in which initial values are taken into a plurality of the registers in parallel by the direct access device. A functional device group having a plurality of functional devices for executing functions;
A setting register group having a plurality of registers for operating each functional device in the functional device group;
Multiple register batch setting register that triggers batch setting of the setting register group,
A register setting device comprising an LSI provided with an EX controller capable of setting initial values collectively to a plurality of the setting registers in the setting register group according to a signal from the plurality of register setting registers. The register setting device according to claim 11,
The EX controller is a register setting device capable of individually changing settings for one register in the setting register group. The register setting device according to claim 11 or 12,
An interface for acquiring data of an initial value for setting in the register from the outside and sending it to the EX controller;
An initial value holding device that holds an initial value for setting in the register acquired through the interface;
The EX controller has a storage device for temporarily holding an initial value for setting the register acquired through the interface. The register setting device according to any one of claims 11 to 13,
The EX controller further includes an encryption / decryption device that encrypts or decrypts an initial value to be set in the register. In the register setting device according to any one of claims 11 to 14,
The EX controller further includes a compression / expansion device that compresses or expands an initial value to be set in the register. In the register setting device according to any one of claims 11 to 15,
The functional device group is
An interface for an external device for exchanging information with the external device;
A CIS analysis mechanism for analyzing CIS information of the external device;
A register setting device having an analysis result storage device for storing an analysis result in the CIS analysis mechanism. The register setting device according to any one of claims 11 to 16,
The external device interface is a register setting device that distributes information held by the initial value storage device and information held by the analysis result storage device to the outside of the LSI. The register setting device according to claim 16,
The external device is a PC card,
The functional device group is a register setting device that automatically reads out the CIS information of the PC card in response to a card detect signal of the PC card. The register setting device according to claim 18,
The register setting device, wherein the LSI further includes an AC specification analysis device for analyzing AC specification information including attribute memory access information, common memory access information, and IO access information of the PC card. The register setting device according to claim 13,
The register setting device, wherein the initial value holding device is provided outside the LSI and is an FPGA or a rewritable ROM. The register setting device according to claim 13,
ROM baking machine for writing information held in the storage device to the initial value holding device;
A register setting device, further comprising a controller for starting the ROM baking machine using the reset key acquired by the interface and writing an initial value to the initial value holding device.

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