CN117416143A - Printer with a printer body - Google Patents

Abstract

The present invention provides a printer, comprising: a first CPU; a second CPU; a nonvolatile first memory; a volatile second memory; and a print engine. The first memory stores therein a boot program, a system program, and a print program, which are stored in the first memory in a compressed manner. When the power is turned on: the first CPU decompresses the print program in the first memory according to the bootstrap program and writes it into the second memory, the second CPU starts the initial control of the print engine according to the print program, a CPU decompresses the system program in the first memory according to the bootstrap program and writes it into the second memory during the initial control of the print engine by the second CPU after the print program is written into the second memory, and starts the execution of the initial process according to the system program.

Description

Printer with a printer body

Technical Field

The present invention relates to a printer, and more particularly, to a technique related to processing at the time of start-up of the printer.

Background

A technique concerning processing at the time of start-up of a printer is known. For example, patent document 1 discloses an image input/output system having a printer, which stores machine configuration information when startup is completed, and uses the stored machine configuration information to start startup processing before a response from hardware when startup is resumed.

Patent document 1: japanese patent laid-open No. 2006-201932

Disclosure of Invention

In recent years, a structure is known in which: the printer has two CPUs, one for mainly controlling the system and the other for controlling the print engine. In such a printer, each CPU performs processing at the time of startup, and thus it is necessary to shorten the startup time, that is, the completion time of the processing at the time of startup. Patent document 1 does not disclose processing at the time of starting up a printer having two CPUs, and there is room for improvement.

In order to solve the above-described problems, the present invention provides a printer comprising: a first CPU; a second CPU; a nonvolatile first memory; a volatile second memory; and a print engine. A boot program, a system program, and a print program are stored in the first memory, and the system program and the print program are stored in the first memory in a compressed manner. When the power is turned on: the first CPU decompresses the print program in the first memory according to the boot program and writes it into the second memory, the second CPU starts initial control of the print engine according to the print program, the first CPU decompresses the system program in the first memory according to the boot program and writes it into the second memory during the initial control of the print engine by the second CPU after the print program is written into the second memory, and starts execution of initial processing according to the system program.

In the printer of the present invention, a first CPU writes a print program from a first memory to a second memory according to a boot program, and a second CPU starts initial control of a print engine according to the print program. Further, during initial control of the print engine by the second CPU, the first CPU writes the system program from the first memory to the second memory according to the boot program, and starts execution of initial processing according to the system program. Thus, the initial processing of the system program by the first CPU and the initial control of the print engine by the second CPU are performed in parallel, and the start time can be expected to be shortened as compared with the case where these processes are performed sequentially and the case where one program is written into the memory in the process according to the other program and the process is started according to the other program.

A control method for realizing the functions of the printer described above, a computer program, and a computer-readable storage medium storing the computer program are also included in the present invention.

Drawings

Fig. 1 is a block diagram showing a schematic configuration of a printer according to the present embodiment.

Fig. 2 is a flowchart showing a procedure of the startup process.

Fig. 3 is a block diagram showing a memory structure in which a state of a boot program is loaded.

Fig. 4 is a block diagram showing a memory structure in which a state of a sub CPU program is loaded.

Fig. 5 is a block diagram showing a memory structure in which a state of an OS is loaded.

Fig. 6 is an explanatory diagram showing a processing procedure when a print instruction is received.

Fig. 7 is an explanatory diagram showing a processing procedure when a print command is received.

Fig. 8 is an explanatory diagram showing a processing procedure when an instruction to acquire print data from an external apparatus to print is received.

Detailed Description

The printer of the present embodiment is specifically described below with reference to the drawings. The present embodiment discloses a printer having two CPUs.

As shown in fig. 1, the printer 1 of the present embodiment includes a main CPU 11, a sub CPU12, an operation panel 13, a communication interface (hereinafter referred to as "communication IF") 14, and a print engine 15, which are connected to a bus 19. The main CPU 11 is an example of a first CPU, and the sub CPU12 is an example of a second CPU.

Further, the printer 1 includes a memory 20, and the memory 20 includes a ROM 21, a RAM 22, an SRAM 23, and an EEPROM 24, connected to the bus 19. The ROM 21 is an example of a nonvolatile first memory, and the RAM 22 and the SRAM 23 are an example of a volatile second memory. The RAM 22 is a memory that needs to regularly rewrite recorded contents for refresh, for example, DRAM (Dynamic Random Access Memory (dynamic random access memory) for short), and is an example of a first-characteristic memory having a first electrical characteristic. The SRAM (Static Random Access Memory (static random access memory) 23 is a memory that does not require refresh, and is an example of a second-characteristic memory having a second electric characteristic.

The main CPU 11 and the sub CPU12 execute various processes based on the user's operations in accordance with the programs read out from the memory 20. The main CPU 11 mainly performs system control such as management of files and tasks of the printer 1, control of the operation panel 13 and the communication IF 14, and the like. The sub CPU12 mainly takes control of the print engine 15.

Various programs and various data are stored in the memory 20. The memory 20 is also used as a work area when various processes are performed. The example of the memory 20 is not limited to ROM, RAM, HDD and the like built in the printer 1, and may be a storage medium that can be read and written by a computer. Computer-readable storage media are non-transitory media. Non-transitory media include recording media such as CD-ROM and DVD-ROM in addition to the examples described above. In addition, non-transitory media are also tangible media. On the other hand, although an electric signal for transmitting a program downloaded from a server or the like on the internet is a signal medium that can be read by a computer, it is one of the mediums that can be read by a computer, but it is not included in a storage medium that can be read by a non-transitory computer. Buffers included in the main CPU 11 and the sub CPU12 are also an example of a memory.

A boot program 31, an operating system (hereinafter referred to as "OS") 32, a main CPU program 33, and a sub CPU program 34 are stored in the ROM 21 of the memory 20. The main CPU program 33 is a program group running on the OS 32, and includes a main control program 331 and a RIP (Raster Image Processor (raster image processor) control program 332. The sub CPU program 34 includes an engine control program 341 and a power saving time program 342. The OS 32 is, for example, a Linux kernel.

The bootstrap program 31 is an example of the bootstrap program. The OS 32 and the main CPU program 33 are one example of system programs, and the main control program 331 and the RIP control program 332 included in the main CPU program 33 are one example of application programs running on the OS 32. The sub CPU program 34 is an example of a print program, the engine control program 341 is an example of a first engine program, and the power saving program 342 is an example of a second engine program.

Each program stored in the ROM 21 is compressed and stored except for the head part of the boot program 31. The boot program 31 includes an uncompressed section 311 and a compressed section 312. The OS 32, the main CPU program 33, and the sub CPU program 34 are all compressed and stored. The EEPROM 24 is used to store a flag or the like indicating a setting made by a user.

The operation panel 13 is, for example, a touch panel, and includes hardware that displays a screen for notifying information to a user and hardware that receives an operation of the user. The communication IF 14 includes hardware for communicating with an external device such as a personal computer. The printer 1 may also have a plurality of communication IF 14 corresponding to a plurality of communication standards. The print engine 15 includes a structure for printing an image on a sheet or the like. The image forming method of the print engine 15 is, for example, an electrophotographic method.

Next, the start-up process of the printer 1 of the present embodiment will be described with reference to a flowchart. This start-up processing is executed by the main CPU 11 when the printer 1 is powered on or reset.

The following processing basically means processing of commands described by the respective CPUs according to programs. That is, the processing such as "judgment", "extraction", "selection", "calculation", "decision", "specific", "acquisition", "reception", "control" and the like in the following description means the processing of the CPU. The processing of the CPU also includes hardware control using the API of the OS. In this specification, description of the OS is omitted to explain the operation of each program. That is, in the following description, the description of the "program B control hardware C" may also mean "program B uses the API control hardware C of the OS". Further, the processing of the command described by the CPU according to the program may be described in an omitted text. For example, it may be described as "CPU running". Further, processing of a command described by a CPU according to a program may be described in a word such as "program a running" in which the CPU is omitted.

"get" is used in the concept that a request is not necessarily made. That is, the process of receiving data without being requested by the CPU is also included in the concept of "CPU acquiring data". In addition, "data" in this specification is represented by a bit string that can be read by a computer. Data of the same meaning but different formats are handled as the same data. The same applies to "information" in the present specification. The terms "request" and "instruction" refer to a concept of outputting information indicating a request and information indicating an instruction to each other. In addition, the information indicating the request or the information indicating the instruction is also simply referred to as "request", "instruction".

Further, the process of the CPU determining whether the information a represents the event B is sometimes conceptually described as "determining whether it is the event B from the information a". The process of the CPU determining whether the information a represents the event B or the event C is sometimes conceptually described as "determining whether the event B or the event C is determined from the information a".

The printer 1 according to the present embodiment is statically set in hardware to operate from a predetermined address when the power is turned on from the power-off state or when a reset instruction is received by a user operation. In the present embodiment, the main CPU 11 starts operation from the beginning of the non-compressed portion 311 in the boot program 31 stored in the ROM 21 (S101).

By starting the processing according to the non-compression section 311 of the boot program 31, the main CPU 11 decompresses the compression section 312 of the boot program 31, and loads it to the SRAM 23 (S102). As a result, as shown in fig. 3, the compressed portion 312 of the decompressed boot program 31 is stored in the SRAM 23. By compressing the compression unit 312 storing the boot program 31, the load on the ROM 21 is reduced as compared with the case where the boot program is not compressed. Hereinafter, the compression unit 312 which is decompressed and written in the SRAM 23 is simply referred to as "boot program 31".

The main CPU 11 reads the boot program 31 written in the SRAM 23 from the SRAM 23, and operates according to the read boot program 31 (S103). The main CPU 11 sets the operation of the RAM 22 so as to load the program into the RAM 22 (S110). The SRAM 23 does not require operation setting, and can be used in a shorter time than the RAM 22. Then, the main CPU 11 loads the sub CPU program 34 stored in the ROM 21 to a predetermined storage location. Specifically, the main CPU 11 decompresses the engine control program 341 and loads it into the RAM 22 (S111). Further, the main CPU 11 decompresses the power saving program 342 and loads it into the SRAM 23 (S112).

Since the main CPU 11 decompresses the engine control program 341 and the power saving time program 342 from the boot program 31 and loads them into the RAM 22 and the SRAM 23, respectively, the decompression processing can be performed together. With S111 and S112, as shown in fig. 4, the printer 1 is in a state in which the engine control program 341 is stored in the RAM 22 and the power saving time program 342 is stored in the SRAM 23.

The engine control program 341 is a program for controlling the print engine 15, and is a program executed by the sub CPU 12. The engine control program 341 includes a program for performing warm-up control as initial control of the print engine 15. The power saving program 342 is, for example, a program for controlling power supply to each part of the printer 1 including the print engine 15 in the power saving mode, and does not include initial control.

After the completion of the loading of the engine control program 341, the main CPU 11 releases the reset of the sub CPU12 in accordance with the boot program 31, and starts the sub CPU12 (S113). The sub CPU12 is hardware different from the main CPU 11, and can operate independently of the main CPU 11.

The sub CPU12 is set to start from the beginning of the engine control program 341 loaded into the RAM 22 at the time of startup. The engine control program 341 has been decompressed by the main CPU 11 in S111 and loaded to a prescribed position of the RAM 22. By starting in S113, the sub CPU12 starts initial control of the print engine 15 according to the description of the engine control program 341. The main CPU 11 may also cause the sub CPU12 to start initial control of the print engine 15 by sending a start command to the sub CPU12 according to the processing of the bootstrap program 31.

The initial control of the print engine 15 is, for example, warm-up control including warm-up operation of the fixing device and toner stirring operation of the developing device. By performing initial control of the print engine 15 at the time of start, the printer 1 can start printing earlier than in the case of performing initial control after receiving a print job. The warm-up control of the print engine 15 of the printer 1 may take a maximum of about 29 seconds due to the influence of the outside air temperature or the like.

The sub CPU12 does not execute the power saving program 342 during the initial control of the print engine 15 by the engine control program 341 at the time of startup, and can execute the power saving program 342 after the initial control of the print engine 15 is completed.

On the other hand, the main CPU 11 can operate independently of the sub CPU12, and after the sub CPU12 is started, the operation according to the bootstrap program 31 is continued while the sub CPU12 performs initial control of the print engine 15. After step S113, the main CPU 11 decompresses the OS 32 stored in the ROM 21, loading it into the RAM 22 (S121). Thus, as shown in fig. 5, the printer 1 is in a state in which the OS 32 is stored in the RAM 22. That is, the printer 1 of the present embodiment causes the sub CPU12 to start initial control of the print engine 15 before decompressing and loading the OS 32 into the RAM 22.

After the completion of the loading of the OS 32, the main CPU 11 ends the operation according to the boot program 31, and starts the execution of the initial processing according to the description of the OS 32 (S122). The initialization processing according to the OS 32 includes initialization of the file system, initialization of the operation panel 13, and initialization of the communication IF 14.

The initial processing according to the OS 32 includes initial processing related to various application programs included in the main CPU program 33. The main CPU 11 decompresses the main control program 331 and the RIP control program 332 included in the main CPU program 33, and loads them into the RAM 22 (S123).

The main control program 331 is a program for controlling the parts of the printer 1 other than the print engine 15 including the operation panel 13 and the communication IF 14. The RIP control program 332 performs RIP processing on image data of a print target, and generates RIP data based on the image data. The main control program 331 and the RIP control program 332 are programs executed by the main CPU 11.

Then, the main CPU 11 starts the system main control process based on the main control program 331, and starts the RIP process based on the RIP control program 332 (S124). The system main control process and the RIP processing process are resident processes according to respective application programs running on the OS 32. There may be other resident processes, and the main CPU 11 may perform starting of other processes.

After the initial processing according to the main CPU program 33, the main CPU 11 starts monitoring the operation state of the sub CPU12 (S125). The main CPU 11 is set to a standby state after all of the initialization of the operation panel 13, the initialization of the communication IF 14, the start of the application program process, and the initial control of the print engine 15 are completed, and monitors the states of the operation panel 13 and the communication IF 14. The standby state is a state in which the print engine 15 can perform printing, and is an example of the first mode.

After the printer 1 is put into the standby state, IF the state in which the operation of the operation panel 13 or the data via the communication IF 14 is not received continues for a predetermined time or longer, the printer is put into the engine sleep state from the standby state. The engine sleep state is a state in which power supply to the heater of the fixing device is stopped. When a predetermined condition such as the internal temperature being equal to or lower than a predetermined temperature is satisfied after a certain time has elapsed, the printer 1 shifts to a deep sleep state in which power consumption is lower. The deep sleep state is a state in which the print engine 15 cannot print, and is an example of the second mode. In the deep sleep state, the sub CPU12 controls power supply to the print engine 15 according to the power saving time program 342. The process of controlling power supply by the power saving time program 342 is one example of specific processing.

The printer 1 cannot perform printing in the deep sleep state, but can receive the operation of the operation panel 13 and the data via the communication IF 14. When an operation or the like is received in the deep sleep state, the printer 1 first supplies power to each section, and transitions from the deep sleep state to the standby state.

Next, the operation of the printer 1 in the standby state will be described. The printer 1 can receive a user operation via the operation panel 13 in a standby state, and can receive a print instruction as an instruction of the user. The printer 1 can receive, for example, in a case where the image data 221 received in advance via the communication IF 14 is stored in the memory 20, an instruction to execute printing based on the stored image data 221 via the operation panel 13.

When a print instruction is received via the operation panel 13 in the standby state, for example, as shown in fig. 6, the main CPU 11 generates print data 222 based on the image data 221 to be printed, and stores the print data in the RAM 22.

Specifically, the system main control process requests RIP processing from the RIP processing process in accordance with the image data 221 designating a print target in accordance with a print instruction. The RIP processing process performs RIP processing on the image data 221, generates RIP data, stores the generated RIP data in the RAM 22, and requests the system main control process to perform post-processing. The system main control process performs post-processing such as dithering (dither) processing and color adjustment processing on the RIP data to generate print data 222.

The main CPU 11 designates a storage location of the generated print data 222, and requests the sub CPU12 to perform print processing. The sub CPU12 controls the print engine 15 according to the engine control program 341. The print engine 15 is in a standby state, and thus is in a printable state, and generates a print product under the control of the sub CPU 12.

Further, the printer 1 can receive various data transmitted from an external device via the communication IF 14 in a standby state. For example, a personal computer (hereinafter referred to as "PC") 41 connected to the printer 1 can transmit data including a print command instructing printing to the printer 1 based on an instruction of a user. The PC 41 is an example of an external device.

When data is received via the communication IF 14 in the standby state, the main CPU 11 analyzes the received data to determine whether or not a print command is included. When the received data includes a print command, for example, as shown in fig. 7, the main CPU 11 analyzes the received print command to acquire image data 221 to be printed.

Then, the main CPU 11 generates print data 222 based on the image data 221 to be printed, and stores the generated print data in the RAM 22, as in the example of fig. 6. The main CPU 11 designates a storage location of the generated print data 222, and requests the sub CPU12 to perform print processing. The sub CPU12 controls the print engine 15 according to the engine control program 341, and performs printing.

The printer 1 is capable of communicating with an external device storing print data via the communication IF 14 in a standby state, and is capable of receiving a print instruction to print the print data stored in the external device via the operation panel 13. The printer 1 can receive a print instruction based on the print data stored in the USB memory 42 via the operation panel 13, for example, in a case where the USB memory 42 in which the print data is stored is connected to the communication IF 14. The USB memory 42 is one example of an external device.

When receiving a print instruction to print data stored in an external device via the operation panel 13 in a standby state, the main CPU 11 acquires the print data from the external device via the communication IF 14, for example, as shown in fig. 8. The main CPU 11 stores the acquired print data 222 in the RAM 22, specifies the storage location of the print data 222, and requests the sub CPU12 to perform print processing. The sub CPU12 controls the print engine 15 according to the engine control program 341, and performs printing.

As described in detail above, according to the printer 1 of the present embodiment, the main CPU 11 loads the sub CPU program 34 from the ROM 21 to the RAM 22 or the like according to the boot program 31, and the sub CPU12 starts initial control of the print engine 15 according to the engine control program 341 of the sub CPU program 34. During initial control of the print engine 15 by the sub CPU12, the main CPU 11 loads the OS 32 from the ROM 21 into the RAM 22 according to the boot program 31, and starts execution of initial processing according to the OS 32. Accordingly, the initial processing by the main CPU 11 is performed in parallel with the initial control of the print engine 15 by the sub CPU12, and a reduction in the start-up time can be expected. For example, compared with a case where the main CPU 11 first performs an initial process to start the OS 32 and the system main control process, and the initial control of the print engine 15 of the sub CPU12 is started by the system main control process, it is possible to expect a reduction in the start time of the printer 1.

The present embodiment is merely an example, and the present invention is not limited thereto. Accordingly, the technology disclosed in the present specification is of course capable of various modifications and variations within a scope not departing from the gist thereof. For example, the printer 1 is not limited to a printer having only a printing function, but may be a multifunction machine, a copying machine, a facsimile apparatus, or the like as long as they have a printing function.

The image forming method of the print engine 15 is not limited to the electrophotographic method, and may be other methods. However, the initial control of the print engine 15 differs depending on the image forming method. For example, in the case of the inkjet type print engine 15, the sub CPU12 performs, as initial control, warm-up of the print head or the like.

For example, the OS 32 is not limited to the Linux kernel, and may be an RTOS or an embedded Windows. The application programs running on the OS 32 are not limited to the main control program 331 and the RIP control program 332, but may be other application programs.

In the present embodiment, the compression unit 312 of the boot program 31 is compressed and stored, and the compression unit 312 is decompressed and loaded into the SRAM 23 to be executed, but the present invention is not limited thereto. For example, the compression unit 312 of the boot program 31 may be decompressed and loaded into the RAM 22. In this case, the main CPU 11 may read the boot program 31 from the ROM 21 and operate the same. However, if the storage is compressed, the size, the load of the ROM 21 is reduced. Further, since the processing speed of reading from the SRAM 23 or the RAM 22 is faster than that of reading from the ROM 21, it is preferable to compress and store a part of the data in the ROM 21, decompress the data, and load the compressed data into the SRAM 23 or the RAM 22.

In the present embodiment, the main CPU 11 decompresses the engine control program 341 and the power saving program 342 and loads them into the RAM 22 and the SRAM 23, respectively, but the present invention is not limited thereto. For example, the main CPU 11 may decompress and load the engine control program 341, and the sub CPU12 may decompress and load the power saving program 342 according to the engine control program 341. The main CPU 11 or the sub CPU12 may load the power saving program 342 into the RAM 22. The SRAM 23 may be omitted.

In any of the flowcharts disclosed in the embodiments, the plurality of processes in any of the plurality of steps may be executed in parallel or in any order as long as the process contents do not contradict each other.

Further, the processing disclosed in the embodiments may be performed by a single CPU, a plurality of CPUs, an ASIC, or the like hardware, or a combination thereof. The processing disclosed in the embodiments can be implemented in various modes such as a recording medium or a method in which a program for executing the processing is recorded.

Claims (9)

1. A printer, comprising:

a first CPU;

a second CPU;

a nonvolatile first memory;

a volatile second memory; and

the print engine is configured to receive a print job,

a boot program, a system program, and a print program are stored in the first memory, the system program and the print program are stored in the first memory in a compressed manner,

when the power is turned on:

the first CPU decompresses the print program in the first memory and writes it into the second memory according to the boot program,

the second CPU starts initial control of the print engine according to the print program,

the first CPU decompresses and writes the system program in the first memory into the second memory according to the bootstrap program and starts execution of initial processing according to the system program during the initial control of the print engine by the second CPU after the print program is written into the second memory.

2. The printer according to claim 1, wherein when the power is turned on, the first CPU causes the second CPU to start the initial control of the print engine according to the print program according to the boot program before decompressing the system program in the first memory and writing the system program in the second memory after decompressing the print program in the first memory according to the boot program and writing the system program in the second memory.

3. The printer according to claim 1, wherein the boot program has a compression section that is stored in the first memory in a compressed manner,

the first CPU decompresses the compression section of the boot program and writes to the second memory, decompresses the print program in the first memory and writes to the second memory according to the boot program written to the second memory, decompresses the system program in the first memory and writes to the second memory.

4. The printer of claim 1, wherein the system program comprises an operating system and an application running on the operating system,

when the power is turned on, the first CPU decompresses and writes the operating system in the system program in the first memory into the second memory according to the boot program, after the print program is written into the second memory, during the initial control of the print engine by the second CPU, and starts execution of the initial process in which the application program is decompressed and written into the second memory according to the operating system, according to the application program, starting a process.

5. The printer of claim 1, wherein the print program comprises a first engine program and a second engine program,

when the power is turned on:

the first CPU decompresses the printing program in the first memory according to the bootstrap program, writes the decompressed first engine program and the decompressed second engine program into the second memory respectively,

the second CPU starts the initial control of the print engine according to the first engine program, does not execute a specific process of the second engine program during the initial control of the print engine, and can execute the specific process different from the initial control of the print engine by the second engine program after the initial control of the print engine is completed.

6. The printer of claim 5 having a first mode in which printing by the print engine is enabled and a second mode in which less power is supplied to the print engine than the first mode and printing by the print engine is disabled,

the second memory includes a first characteristic memory as a memory having a first electrical characteristic and a second characteristic memory as a memory having a second electrical characteristic,

when the power is turned on, the first CPU decompresses the print program in the first memory according to the boot program, writes the decompressed first engine program into the first characteristic memory, writes the decompressed second engine program into the second characteristic memory,

the second CPU controls power to the print engine according to the second engine program.

7. The printer according to any one of claims 1 to 6, further comprising an operation panel for receiving a print instruction,

when the power is turned on, the first CPU decompresses the system program in the first memory according to the bootstrap program and writes it into the second memory during the initial control of the print engine by the second CPU after writing the print program into the second memory, starts execution of the initial processing according to the system program, initializes the operation panel according to the system program in the initial processing,

after the operation panel is initialized, in a case where the print instruction is received via the operation panel:

the first CPU generates print data as a print target according to the system program,

the second CPU causes the print engine, which has completed the initial control, to perform printing based on the print data according to the print program.

8. The printer according to any one of claims 1 to 6, further comprising a communication interface for communicating with an external device,

when the power is turned on, the first CPU decompresses the system program in the first memory according to the bootstrap program and writes it into the second memory during the initial control of the print engine by the second CPU after writing the print program into the second memory, starts execution of the initial processing according to the system program, initializes the communication interface according to the system program in the initial processing,

after the communication interface is initialized, in the case where a print command is received from the external device via the communication interface:

the first CPU generates print data as a print target based on the received print command according to the system program,

the second CPU causes the print engine, which has completed the initial control, to perform printing based on the print data according to the print program.

9. The printer according to any one of claims 1 to 6, further comprising:

an operation panel for receiving a print instruction; and

a communication interface for communicating with an external device,

when the power is turned on, the first CPU decompresses the system program in the first memory according to the bootstrap program and writes it into the second memory during the initial control of the print engine by the second CPU after writing the print program into the second memory, starts execution of the initial processing according to the system program, initializes the operation panel and the communication interface according to the system program in the initial processing,

after the operation panel and the communication interface are initialized, in the case where the print instruction to take print data stored in the external device as a print object is received via the operation panel:

the first CPU reads out the print data from the external device via the communication interface,

the second CPU causes the print engine, which has completed the initial control, to perform printing based on the print data read out from the external device according to the print program.