JP2021157561A - Recording device and control method therefor - Google Patents

Abstract

To provide a recording device that can appropriately set a temperature at which functional restriction is imposed on a recording medium.SOLUTION: A recording device 100 configured to access a recording medium 150 includes control means for setting a temperature threshold at which functional restriction is imposed on the recording medium to a value within a range that can be set in the recording medium, and measurement means for measuring a speed of writing to the recording medium or a speed of reading from the recording medium when the functional restriction is imposed on the recording medium by writing or reading data having a predetermined size to or from the recording medium (S607 to S608). The control means sets a temperature threshold at which the functional restriction is imposed on the recording medium, based on the writing speed or the reading speed measured by the measurement means (S609 to S614).SELECTED DRAWING: Figure 6

Description

The present invention relates to a recording device that can access a recording medium and a method for controlling the recording device.

A flash memory card is widely used as a recording medium for an imaging device. In recent years, while performance demands for write / read speed to flash memory cards have increased, the market demands that the physical memory size be the same or larger. However, when trying to improve the performance of a flash memory card, the electric power and heat / temperature increase, and when trying to further reduce the size, the heat tends to be trapped.

Then, due to this temperature rise, overheating that exceeds the guaranteed operating temperature of each hardware component occurs, resulting in failure or failure. As a result, the content recorded by the user may not be viewable due to media corruption.

In order to avoid heating due to a temperature rise, Patent Document 1 describes that the outside air temperature is detected and the speed is dynamically controlled according to the detected outside air temperature.

In addition, there is a technique called "thermal throttling" as a technique for preventing failures and failures due to overheating. This is because the recording media stores its own temperature threshold inside the flash memory card, and when the value that can be obtained from the internal thermometer of the recording media exceeds the temperature threshold, functional restrictions such as access speed limitation This is a technique for suppressing a temperature rise above the threshold value.

By using this technology, it is possible to maintain the guaranteed operating temperature for the hardware parts in the recording media even in a harsh environment, guarantee the reliability of the recorded content, and extend the life of the recording media. Will be possible.

Thermal throttling (suppressing temperature rise by limiting functions) also has the disadvantage of slowing down the write / read speed. This is due to the flash memory card characteristic that the write / read speed is proportional to the heat / power increase. When thermal throttling is executed, the write / read speed is limited until the temperature of the recording medium drops to the threshold for release. Then, when the temperature of the recording medium becomes equal to or lower than the threshold value for release, the thermal throttling is released, the limitation on the write / read speed is released, and the write / read speed is restored to the normal top speed.

CFexpress, which is a standard for recording media, provides a function called HCTM (Host Controlled Thermal Management) for thermal throttling. With this HCTM function, the host side can set the temperature threshold value at which thermal throttling is executed.

JP-A-2017-5323

In the HCTM function, for example, by setting the temperature threshold value to a settable temperature upper limit, it becomes possible to control the thermal throttling with difficulty in activating it.

However, if the temperature threshold is set to a temperature upper limit that can be set by the HCTM function or the like in order to make it difficult to activate thermal throttling, high-speed data recording / reading is performed even in the case of data recording or reading that does not require top speed. Is done. Therefore, the temperature tends to rise. When the temperature rises and the temperature of the recording medium reaches the upper limit, writing / reading to / from the recording medium becomes practically impossible. Therefore, writing / reading cannot be performed until the temperature of the recording medium drops, and shooting (recording) or image reproduction may not be possible, for example, a shooting chance may be missed.

By executing thermal throttling, it is possible to limit the write and read speeds to suppress heat generation of the recording medium, but on the other hand, since the write and read speeds are limited, control is performed in a balanced manner between the two. Is preferable.

By using the HCTM command, the recording medium can limit the speed in a high temperature environment, but the write and read speeds at the time of the speed limit are unknown from the recording device. Therefore, it is unclear whether the performance (write speed, read speed) for executing a specific process is sufficient when the function restriction is executed.

When the performance of the recording device is sufficient even if the function is restricted, the temperature rise can be suppressed by restricting the function. However, the performance (write speed, read speed) when the function is limited differs depending on the recording medium.

The present invention has been made in view of such a situation, and by measuring the writing or reading speed of the recording medium at the time of function limitation and setting a temperature threshold value at which the function limitation is executed according to the measurement result. An object of the present invention is to provide a recording device capable of appropriately setting a temperature at which the function of a recording medium is restricted.

In order to solve the above-mentioned problems, the recording device of the present invention is a recording device that can access the recording medium, and is a control means for setting a temperature threshold at which the function is restricted in the recording medium, and a predetermined size for the recording medium. The control means has a measuring means for measuring the writing speed or the reading speed to the recording medium when the function is restricted in the recording medium by writing or reading the data of the above, and the control means limits the function in the recording medium. Is characterized in that the temperature threshold value at which the above is performed is set based on the writing speed or reading speed measured by the measuring means.

According to the present invention, the writing or reading speed of the recording medium at the time of function limitation is measured, and the temperature at which the function limitation of the recording medium is applied is set by setting the temperature threshold value at which the function limitation is executed according to the measurement result. A recording device that can be appropriately set can be provided.

The figure which shows typically the structure of the image pickup apparatus 100. The flowchart of the process for using the HCTM function executed by the image pickup apparatus 100. The flowchart which shows the HCTM useability determination processing. A flowchart showing a white list determination process. A flowchart showing a mode determination process. A processing flowchart for using the HCTM function according to the performance measurement result.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The following embodiments do not limit the invention according to the claims. Although a plurality of features are described in the embodiment, not all of the plurality of features are essential to the invention, and the plurality of features may be arbitrarily combined. Further, in the attached drawings, the same or similar configurations are given the same reference numbers, and duplicate explanations are omitted.

[First Embodiment]
<Configuration of imaging device>
FIG. 1 is a diagram schematically showing a configuration of an image pickup apparatus 100 which is an example of a recording apparatus.

In FIG. 1, a lens unit 102, an image pickup unit 103, a display unit 104, an operation unit 105, an image pickup device temperature detection unit 106, a heat dissipation fan 107, and a CPU 108 are connected to the image pickup device internal bus 101. Further, the image processing unit 109, the first media control unit 110, the second media control unit 111, the RAM 112, the non-volatile memory 113, and the power supply unit 114 are connected to the image processing device internal bus 101. Each part connected to the image pickup device internal bus 101 is configured so that data can be exchanged with each other via the image pickup device internal bus 101.

The CPU 108 controls each part of the image pickup apparatus 100 by using the RAM 112 as a work memory according to a program stored in the non-volatile memory 113, for example.

The non-volatile memory 113 stores image data, audio data, other data, various programs for operating the CPU 108, and the like. The non-volatile memory 113 is composed of, for example, a hard disk (HD) or a ROM.

Based on the control of the CPU 108, the image processing unit 109 refers to the image data stored in the non-volatile memory 113 or the RAM 112, the image data obtained by the imaging unit 103 of the subject optical image incident through the lens unit 102, and the like. Perform various image processing. The image processing performed by the image processing unit 109 includes A / D conversion processing, D / A conversion processing, image data encoding processing, compression processing, decoding processing, enlargement / reduction processing (resizing), noise reduction processing, and color conversion processing. Etc. are included. The image processing unit 109 may be configured by a dedicated circuit block for performing specific image processing. Further, depending on the type of image processing, the CPU 108 may perform image processing according to a program without using the image processing unit 109.

The display unit 104 displays an image, a GUI screen that constitutes a GUI (Graphical User Interface), and the like based on the control of the CPU 108. The CPU 108 controls each unit of the image pickup apparatus 100 so as to generate a display control signal according to a program, generate a video signal for display on the display unit 104, and output the video signal to the display unit 104. The display unit 104 displays an image based on the output image signal. The image pickup device 100 itself may include an interface for outputting a video signal to be displayed on the display unit 104, and the display unit 104 may be configured by an external monitor (television or the like).

The operation unit 105 is an input device for accepting user operations, including a touch panel, a power button, a shutter button, a mode switching dial, a cross key, an operation dial, and a menu button. The touch panel is an input device that is superposed on the display unit 104 and is configured in a plane so that coordinate information corresponding to the contacted position is output.

The power supply unit 114 has a power supply input terminal to which the battery 115 and the AC adapter 116 can be mounted, and is a power supply selection circuit composed of a comparator, a load switch, etc., and gives priority to the high voltage side or the AC adapter 116 to supply power. select.

Further, the power supply unit 114 includes a battery interface for connecting the image pickup device 100 and the battery 115. The battery interface includes not only a power supply and ground, but also a communication terminal with a microcomputer (not shown) inside the battery 115, and a temperature detection unit (not shown) inside the battery 115. Further, the power supply unit 114 includes an AC adapter interface for connecting the image pickup device 100 and the AC adapter 116. The AC adapter interface includes a detector that detects the power supply, ground, and AC adapter 116.

Further, the power supply unit 114 can notify the CPU 108 of the information of the battery 115 and the AC adapter 116 via the image pickup device internal bus 101. Further, the power supply unit 114 regulates the voltage from the selected power source using a DC / DC converter or a series regulator (not shown), and supplies electric power to each unit constituting the image pickup apparatus 100. Further, the power supply unit 114 A / D-converts the voltages of the attached battery 115 and the AC adapter 116, and notifies the CPU 108 of the values.

The battery interface 117 is an interface for connecting the image pickup device 100 and the battery 115, and is not only a power supply and a ground, but also a communication terminal with a microcomputer (not shown) inside the battery 115 and a temperature detection unit (not shown) inside the battery 115. including.

The AC adapter interface 118 is an interface for connecting the image pickup device 100 and the AC adapter 116, and includes a power supply, a ground, and a detection signal of the AC adapter 116.

The image pickup unit 103 is an image pickup element such as a CCD sensor or a CMOS sensor. The lens unit 102 is a lens unit composed of a zoom lens, a focus lens, a shutter, an aperture, a distance measuring unit, an A / D converter, and the like.

The imaging unit 103 can capture still images and moving images. The image data of the captured image is transmitted to the image processing unit 109, subjected to various processing, and then recorded as a still image file or a moving image file on the first recording medium 150 or the second recording medium 160.

The heat dissipation fan 107 is a cooling fan, and the temperature inside the image pickup device 100 is detected by the image pickup device temperature detection unit 106 and notified to the CPU 108. The CPU 108 controls the rotation speed of the fan of the heat dissipation fan 107 according to the temperature, and adjusts the temperature inside the image pickup apparatus 100.

The image pickup apparatus 100 can access the first recording medium 150 via the first media control unit 110 and the first media interface 155, and the image processing unit 109 performs image processing, encoding processing, and compression processing. The still image / moving image data can be recorded on the first recording medium 150. Further, the image pickup apparatus 100 can read the still image / moving image data recorded on the first recording medium 150 via the first media control unit 110 and the first media interface 155. The image pickup apparatus 100 displays an image obtained by decoding the read data by the image processing unit 109 on the display unit 104.

The first recording medium 150 is a recording medium that can be attached to and detached from the image pickup apparatus 100, and in the present embodiment, it is a memory card that conforms to the CFexpress standard.

The first media control unit 110 can also communicate control commands with the first memory controller 152 via the first media interface 155. The control commands include commands for acquiring vendor information, temperature information, write count information, and the like, in addition to commands for recording and reproducing data.

The first recording medium 150 includes a first memory controller 152, a first NAND memory unit 153, and a first media temperature detection unit 154, each of which is connected by a first recording media internal bus 151. ..

The first memory controller 152 records the still image / moving image data transferred from the first media control unit 110 in the first NAND memory unit 153. At this time, the first memory controller 152 executes control of writing to the cache area of the first NAND type memory unit 153 and control of moving data to the main data area. Further, the first memory controller 152 can perform garbage collection for securing a free area by moving and organizing fragmented data in the first NAND memory unit 153.

Further, the first memory controller 152 acquires the temperature of the first NAND type memory unit 153 detected by the first media temperature detection unit 154. The first memory controller 152 controls the clock frequency to the first NAND type memory unit 153, controls access prohibition / permission, and controls the access speed according to the acquired temperature.

The control of the access speed performed by the first memory controller 152 is divided according to the temperature, and in the present proposal, it is divided into a first speed limit and a second speed limit. Further, the temperature when the first speed limit is applied is set as the first speed limit temperature, the temperature when the second speed limit is applied is set as the second speed limit temperature, and the first speed limit temperature is the second. It shall be lower than the speed limit temperature. Further, it is assumed that the second speed limit is slower than the first speed limit.

The second recording medium 160 is connected to the image pickup apparatus 100 via the second media control unit 111 and the second media interface 165, and has the same configuration and function as the first recording medium 150. The second memory controller 162, the second NAND memory unit 163, and the second media temperature detection unit 164 are the first memory controller 152, the first NAND memory unit 153, and the first media, respectively. Corresponds to the temperature detection unit 154. The second memory controller 162, the second NAND memory unit 163, and the second media temperature detection unit 164 are connected by the second recording media internal bus 161.

When the still image shooting mode is selected by the mode switching dial by the user operation, the imaging device operates in the still image shooting mode. In the still image shooting mode, the CPU 108 captures a still image by the imaging unit 103 in response to an operation on the shutter button, transmits the image data of the captured still image to the image processing unit 109, and performs various processing. To control. After that, the CPU 108 generates a still image file from the image data that has undergone image processing, and uses the still image file as the first recording medium via the first media control unit 110 or the second media control unit 111. Recording control for recording on the 150 or the second recording medium 160 is performed.

When the moving image shooting mode is selected by the mode switching dial by the user operation, the imaging device operates in the moving image shooting mode. In the moving image shooting mode, the CPU 108 starts capturing a moving image by the imaging unit 103 in response to an operation to the shutter button or the moving image shooting button, and again shoots the moving image until the shutter button or the moving image shooting button is operated. .. The CPU 108 transmits the image data of the captured moving image to the image processing unit 109, performs various processing, generates a moving image file from the image data subjected to the image processing, and uses the media control unit (110 or 111). Therefore, recording control for recording on a recording medium (150 or 160) is performed.

Further, when the reproduction mode button is operated by the user operation, the imaging device is put into the reproduction mode. In the playback mode, the CPU 108 uses the image file (still image) recorded on the first recording medium 150 and the second recording medium 160 via the first media control unit 110 and the second media control unit 111. (File, moving image file) is read and playback control is performed to display it on the display unit 104. In the playback mode, the CPU 108 displays the image data of the still image file on the display unit 104 for the still image file. Regarding the video file, first, the representative image or the frame image of the first frame of the video is read out and displayed on the display unit 104, and then, in response to the user inputting the instruction to start the video playback, the video file is displayed. Performs video playback that continuously plays and displays multiple frame images of a file.

<HCTM function of recording media>
Some memory cards conforming to the CFexpress standard can use a function called HCTM (Host Controlled Thermal Management). However, since HCTM is an optional function, some recording media do not support it. As described above, in the recording media (150, 160), the memory controller (152, 162) controls the clock frequency and prohibits access based on the temperature detected by the media temperature detection unit (154, 164). Function restriction control such as permission control and access speed control is performed. In the HCTM function, the temperature at which the threshold value for performing this function limitation control can be set from the media control unit (110, 111) on the host side to the recording media (150, 160).

In HCTM, a first value and a second value (first value <second value) can be set as the temperature threshold setting. When the temperature detected by the media temperature detection unit (154, 164) is less than the first value, the memory controller (152, 162) does not perform the function limitation control, so that the access speed is not limited, but the consumption is consumed. The current is also unrestricted. Therefore, when recording a 4K moving image or the like, the rush current at the time of writing becomes large. When the temperature detected by the media temperature detection unit (154, 164) is equal to or greater than the first value and less than the second value, the memory controller (152, 162) performs function limitation control to consume current and write speed. Will operate in the first restriction mode. The limit of the writing speed in the first limiting mode differs depending on the recording medium, but in many cases, writing is possible if the recording is about 4K moving image. When the temperature detected by the media temperature detector (154, 164) is equal to or higher than the second value, the memory controller (152, 162) functions the recording medium (150, 160) significantly more than the first limiting mode. Operate in a second restricted mode in which the restriction is performed. In the second limiting mode, since the power consumption and the writing speed are significantly limited, it is often impossible to write / read to the actual media. In the second restriction mode, the temperature of the recording medium can be lowered by significantly restricting the functions (substantially disabling writing / reading). In this way, the media control units (110, 111) of the imaging device on the host side set the timing of transition to the first restricted mode and the second restricted mode in the recording media compatible with the HCTM function as the first value. It can be controlled by setting a second value.

Default values (DEFAULT_TMT1 and DEFAULT_TMT2) for each of the first value and the second value are set for each recording medium. Further, a temperature setting upper limit value (MXTMT) and a temperature setting lower limit value (MNTMT) indicating a range of temperature setting that can be set are also set for each recording medium. The media control unit (110, 111) of the image pickup device uses a command to acquire media capability information from the recording medium (150, 160), so that the image pickup device can perform the temperature setting upper limit value (1) set in the recording medium. It is possible to acquire media capacity information including MXTMT) and the lower limit of temperature setting (MNTMT). Then, within the range of the temperature setting indicated by the temperature setting upper limit value and the temperature setting lower limit value, the first value and the second value which are the threshold values of the temperature at which the first limit mode and the second limit mode are executed are executed. And can be set.

When power is supplied to the recording medium and the power is turned on, the memory controller of the recording medium initially sets default values (DEFAULT_TMT1 and DEFAULT_TMT2) for the first value and the second value, respectively. If the media control unit (110, 111) of the image pickup apparatus does not set the first value and the second value, this default value is used. Using the default value is called "HCTM standard use". The media control unit of the image pickup apparatus sets the first value and the second value from the temperature setting lower limit value (MNTMT) set in the recording medium to the temperature setting upper limit value (MXTMT) by using a command related to the HCTM function. ) Can be changed. Since the first value and the second value are stored in the volatile memory of the recording medium, they are erased in response to the recording media power being turned off, and when the power is turned on again. The default value is set to. Setting the first value and the second value close to the temperature setting upper limit value (MXTMT) with respect to the "HCTM standard use" is referred to as "HCTM upper limit use". In the present embodiment, in the use of the HCTM upper limit, the second value is set to the temperature setting upper limit value (MXTMT), and the first value is set to the temperature one degree below the temperature setting upper limit value (MXTMT). However, the temperature setting of the first value and the second value when the HCTM upper limit is used is not limited to this. The first value and the second value are closer to the temperature setting upper limit value (MXTMT) than when the HCTM standard is used so that the first limit mode and the second limit mode are less likely to occur even if the temperature rises. Just set the value. Furthermore, by making the first value when using the HCTM upper limit larger than the second value when using the HCTM standard, it becomes difficult for the first restriction mode and the second restriction mode to be activated when the HCTM upper limit is used. You will be able to make the best use of the performance of the recording media. However, in this case, the temperature tends to rise.

In the present embodiment, the recording medium is a memory card conforming to the CFexpress standard. However, the present invention can be applied to recording media of different standards as long as it has a function that allows the host device to set a temperature for limiting the function of the recording medium, such as the HCTM function of the CFexpress standard. ..

<Processing flow using HCTM function>
FIG. 2 is a main flowchart of a process for using the HCTM function executed by the image pickup apparatus 100. This flowchart is realized by the CPU 108 executing a control program stored in the non-volatile memory 113 to control each part of the image pickup apparatus 100. In this flowchart, the processing related to the recording medium is mainly described, but in addition to these processing, shooting processing, image reproduction processing, display processing of captured images and menu screens, menu setting processing, and the like are performed. .. Further, in the description of this flowchart, the processing for the first recording medium 150 will be described, but the processing for the second recording medium is also performed in the same manner.

The process of this flowchart is executed in response to the fact that the power button is pressed and the power of the image pickup apparatus 100 is turned on.

First, in S201, the media control unit 110 initializes the PCIe bus for the recording medium 150. Here, commands are exchanged at the physical layer level between the first media control unit 110 of the image pickup device on the host side and the recording medium 150, the recording media is activated, and the power of the recording media is turned on. do. Then, in S202, the media control unit 110 performs initialization according to the NVMe protocol, and performs startup processing including Submission Queue and Completion Queue. In S202, unlike the physical layer level initialization in S201, the initialization required by the software level protocol is performed.

Next, in S203, the media control unit 110 issues an Identity command in order to acquire the detailed capability (media capability information) of the recording medium 150. This Identity command is one of the commands for acquiring basic information such as commands and functions supported by the recording medium. The capability information that can be obtained through this command includes, for example, the model name and firmware version, whether or not a specific command or function is supported, the number of low power consumption modes, and the specific power consumption value. Then, in S204, the CPU 108 analyzes the HCTM compatibility information from the capability information of the recording medium 150 acquired by the Identity command in S203. Then, in S205, the CPU 108 determines whether or not the recording medium 150 is compatible with HCTM as a result of analysis in S204, and if it is determined that the recording medium 150 is compatible with HCTM, recording using the HCTM function after S206. Proceed to the media control sequence. If it is determined in S205 that the HCTM is not supported, the processing of this flowchart is terminated, and the processing of the recording medium that does not use the HCTM function is executed.

In S206, the CPU 108 acquires the temperature setting upper limit value (MXTMT) and the temperature setting lower limit value (MNTMT) of the recording medium 150 from the media capacity information acquired in S203. This is a value that is valid only when HCTM is supported, and indicates the upper limit value and the lower limit value of the temperature values (first value, second value) that can be set from the host side. That is, here, the range of the value of the temperature setting that can be set is acquired. The CPU 108 stores the temperature setting upper limit value (MXTMT) and the temperature setting lower limit value (MNTMT) acquired here in the RAM 112.

Next, in S207, the first media control unit 110 issues a Get Feature command, which is a detailed function information acquisition command. This command is a command for acquiring the information of the recording medium 150, but can acquire information different from the Identity command. The Get Feature command is a command that can acquire more detailed information than the Identity command. By using the Get Feature command, it is possible to acquire the set temperature (first value, second value) in the HCTM function currently set in the recording medium 150. Since the set temperature acquired here is a value acquired without changing the temperature setting immediately after the power of the recording medium is turned on, it is the default value set in the recording medium 150. That is, here, the default value of the threshold value (first value, second value) of the temperature setting of the recording medium is acquired. The CPU 108 stores the first value acquired here as DEFAULT_TMT1 and the second value as DEFAULT_TMT2 in the RAM 112.

Next, in S208, the CPU 108 determines whether or not HCTM can be used. This will be described in detail with reference to FIG. 3 described later. Since HCTM is not a mandate function but an optional function, there may be recording media that are not supported. In addition, since it is a function that has no advantage for the recording media vendor, there is a possibility that the pre-vendor in-vendor inspection is not performed precisely like the Suspend Address Command of the previous Video Speed Class standard. For this reason, in S208, the validity of the temperature setting upper limit value, the temperature setting lower limit value, and the HCTM default value acquired in S207 is confirmed, and whether or not to use the HCTM function based on the confirmation result. Is determined. Then, in S209, the CPU 108 proceeds to S210 if the determination result in S208 is HCTM available. If the determination result in S208 is that HCTM cannot be used, the processing of this flowchart is terminated, and the processing of the recording medium that does not use the HCTM function is executed.

In S210, the CPU 108 makes a white list determination. A detailed description will be given with reference to FIG. In S211 the CPU 108 proceeds to S212 if the determination is successful, based on the result of the white list determination in S210. If the determination fails, the processing of this flowchart is terminated, and the processing of the recording medium that does not use the HCTM function is executed.

In S212, the CPU 108 makes a mode determination. The details will be described with reference to FIG. By this mode determination, the current operation mode of the image pickup apparatus is determined, and it is determined whether to use "HCTM standard use" or "HCTM upper limit use" according to the operation mode. As described above, in the case of "HCTM standard use", the default value acquired in S207 is used as it is, and in the case of "HCTM upper limit use", the value based on the temperature setting upper limit value acquired in S206 is used. .. In this way, the temperature at which the recording medium shifts to the first limiting mode and the second limiting mode is switched according to the operation mode of the imaging device. In the operation mode that does not require speed, the HCTM standard using the default value is used to suppress the temperature from rising more than necessary. Then, in the operation mode in which speed is required, by using the upper limit of HCTM, it becomes possible to continue to draw out the performance of the recording medium until the temperature becomes higher than that in the case of using HCTM as standard.

In S213, the CPU 108 determines whether or not the HCMT upper limit utilization is set as a result of the mode determination in S212. If the HCMT upper limit usage is set, the process proceeds to S214. In S214, the CPU 108 determines the second value as the temperature setting upper limit value, MXTMT, and the first value as MXTMT-1 as the temperature setting of the HCTM set in the recording medium. In the present embodiment, the first value is MXTMT-1, which is one degree lower than MXTMT. However, the first value when using the upper limit of HCTM does not have to be MXTMT-1, and if it is larger than the default value DEFAULT_TMT1, it is set to another value according to the operating conditions and the heat generation rise curve. You may.

If it is determined in S213 that the HCTM standard use is set instead of the HCMT upper limit use as a result of the mode determination in S212, the process proceeds to S215. In S215, the CPU 108 determines the HCTM temperature setting set in the recording medium as a default value. That is, the CPU 108 determines the first value as DEFAULT_TMT1 and the second value as DEFAULT_TMT2. In the present embodiment, the default value of the recording medium is used in the standard use, but if there is another index value, that value may be adopted instead of the default value. Even when the default value is not used, the first value in HCTM standard use is smaller than the first value in HCTM upper limit use, and the second value in HCTM standard use is HCTM upper limit use. It shall be smaller than the second value of.

Next, in S216, the CPU 108 and the first media control unit 110 use the detailed function setting command called the SetFature command to determine the temperature threshold value (first value, first value, first) of the HCTM function determined in S214 or S215. The process of setting the value of 2) to the recording medium 150 is performed. Specifically, the first value and the second value determined in S214 or S215 are set in the argument for setting the HCTM temperature threshold value in the Set Feature command, and the Set Feature command is recorded on the recording medium 150. Issued to. By setting the temperature threshold value in S216, the temperature threshold value for executing the first limiting mode and the second limiting mode on the recording medium 150 is changed.

In S217, the CPU 108 determines whether the operation mode of the image pickup apparatus 100 has changed. If the mode has been changed, the process proceeds to S212. If the mode has not changed, the process proceeds to S218. In the imaging device, when the user operates the mode switching dial, the mode is switched between the still image shooting mode and the moving image shooting mode. Further, when the play button is operated, the mode is switched to the play mode, and when the menu button is operated, the setting screen is displayed on the display unit 104, and the mode is switched to the setting mode in which various settings are made according to the user operation. In addition to changing to still image shooting mode, movie shooting mode, playback mode, and setting mode, changing the image to be played back in playback mode, executing specific functions such as copying image data between media, etc. In this embodiment, the operating state of the image pickup apparatus is also included in the mode change. Therefore, in S217, it is determined that the mode has been changed even when the operating state is changed, and the processes S212 to S216 are executed for the changed mode.

In S218, the CPU 108 determines whether or not the power has been turned off. If there is an operation to turn off the power, this process is terminated and the process for turning off the power is performed. If there is no power off operation, the process returns to S217. That is, every time the mode is changed, the processes of S212 to S216 are repeated.

With reference to FIG. 3, a detailed description of the HCTM availability determination process of S208 of FIG. 2 will be described.

First, in S301, the CPU 108 confirms whether the temperature setting upper limit value (MXTMT) and the temperature setting lower limit value (MNTMT) acquired in S206 are both non-zero. If the temperature setting upper limit value or temperature setting lower limit value is 0 ° C even though it is compatible with HCTM, the initial value 0 is entered because the vendor has not entered the value, instead of interpreting it as 0 ° C. I think it is. If neither the temperature setting upper limit value nor the temperature setting lower limit value is 0, the process proceeds to S302. If either the temperature setting upper limit value or the temperature setting lower limit value is 0, the process proceeds to S304, and in S304, the CPU 108 determines that the HCTM cannot be used. In the present embodiment, it is determined that HCTM cannot be used when either the temperature setting upper limit value or the temperature setting lower limit value is 0, but both the temperature setting upper limit value and the temperature setting lower limit value are 0. It may be determined that HCTM cannot be used only in certain cases.

Next, in S302, the CPU 108 determines whether or not the temperature setting upper limit value (MXTMT) is within a predetermined range in order to confirm the validity of the value. Specifically, when the temperature setting upper limit value (MXTMT) is in the range of 60 to 110 (° C.), it is determined that it is appropriate. In the present embodiment, the temperature range to be judged to be appropriate is set in advance as 60 ° C. to 110 ° C., but the temperature range is not limited to this. If the temperature setting upper limit value (MXTMT) is in the temperature range of 60 to 110, the process proceeds to S303. If it is out of the range, the process proceeds to S304, and in S304, the CPU 108 determines that the HCTM cannot be used.

Next, in S303, the CPU 108 compares DEFAULT_TMT2 corresponding to the second value among the default values acquired in S207 with the temperature setting upper limit value (MXTMT) acquired in S206. If DEFAULT_TMT2 set as the default value of the second value on the recording medium is larger than MXTMT which is the upper limit of the temperature setting, the value of DEFAULT_TMT2 or MXTMT set on the recording medium is not appropriate. Therefore, if DEFAULT_TMT2 is larger than MXTMT, which is the upper limit of the temperature setting, the process proceeds to S304, and the CPU 108 determines that HCTM cannot be used. If DEFAULT_TMT2 is equal to or less than the temperature setting upper limit value, the process proceeds to S305, and in S305, the CPU 108 determines that HCTM can be used.

As described above, in the present embodiment, HCTM availability / non-availability is determined by checking S301, S302, and S303, but other determinations may be made. For example, the temperature setting upper limit value (MXTMT) and the temperature setting lower limit value (MNTMT) may be compared, and if MXTMT is smaller than MNTMT, it may be determined that HCTM cannot be used.

Next, the white list determination process will be described with reference to FIG. For this determination, reliable recording media information (white list) must be stored in the image pickup apparatus 100 in advance. As a specific example of this retained information, ModelName will be described as an example, but the present invention is not limited to this, and a VenderID obtained from the physical layer communication of PCIe may be used.

First, in S401, the CPU 108 analyzes the media capability information acquired in S203 and acquires ModelName. Next, in S402, the CPU 108 collates with the information internally held in advance. In S403, the CPU 108 determines whether the ModelName acquired in S401 is included in the internally held information (whether it hits), and if it does not hit, determines in S404 that the white list determination has failed and ends. When ModelName is included in the internally held information, the CPU 108 determines in S405 that the whitelist determination is successful, and ends the whitelist determination process.

Next, the mode determination process will be described in detail with reference to FIG. First, in S501, the CPU 108 determines whether or not the current operation mode of the image pickup apparatus is the still image shooting mode. If it is determined that the still image shooting mode is set, the process proceeds to S506, and if not, the process proceeds to S502 and the next determination is made. In S502, the CPU 108 determines whether or not the current operation mode of the image pickup apparatus is the moving image shooting mode. If it is determined that the movie shooting mode is set, the process proceeds to S506, and if not, the process proceeds to S503 and the next determination is made. In S503, the CPU 108 determines whether or not the current operation mode of the image pickup apparatus is the reproduction mode. When the reproduction mode is determined, in S504, the CPU 108 determines whether the mode change operation detected in S217 is an operation to the moving image reproduction button for instructing the moving image reproduction. If it is an instruction to play a moving image, the process proceeds to S506. In the case of transition to a playback mode, playback of a still image, playback of an image for one frame in a video file, or the like other than the instruction of video playback, the process proceeds to S505. When the playback target image is changed (switched) in the playback mode, the next still image or the representative image of the next moving image (only the image of the first frame) is played back, so that the playback target image is changed. In the case of, the process proceeds to S505. If it is determined in S503 that the playback mode is not set, the process proceeds to S505. In S505, the CPU 108 determines to use the HCTM as standard. Then, in S506, the CPU 108 determines that the HCTM upper limit is used. As described above, in the present embodiment, it is determined whether to use the HCTM standard or the HCTM upper limit according to the operation mode and the operation state of the image pickup apparatus.

In the present embodiment, the HCTM upper limit is used when changing to the still image shooting mode, when changing to the moving image shooting, or when the moving image is played back in the playback mode. Then, in other modes (setting mode and still image reproduction in the reproduction mode), HCTM is used as standard. In the still image shooting mode and the moving image shooting mode, it is decided to use the HCTM upper limit in order to bring out the maximum performance of the recording medium because the shooting timing / chance intended by the user is not missed.

In video playback, if the video is read out in time for the playback interval, so-called underflow, the video playback will stop, so even if the temperature rises a little, the maximum performance of the recording media can be obtained using the HCTM upper limit. Decide to do.

In addition, still image reproduction in the reproduction mode, simultaneous reproduction of a plurality of thumbnails, and HCTM standard use in the setting mode. Further, in the reproduction mode, even when the moving image file is reproduced, when only one frame image of the moving image file (only the representative image or the selected frame) is reproduced, HCTM is used as standard as in the still image reproduction. In addition, there is no particular time constraint when executing the RAW image development function, recording media initialization function, image data copy function between multiple media, moving image cutout editing function, etc. as the functions of the image pickup device. Since it is not necessary to bring out the best performance of the media, HCTM is used as standard. The RAW image development function, the image data copy function between media, and the moving image cropping / editing function may raise the temperature by 20 ° C. to 25 ° C. when these functions are executed for image data having a large data size. Therefore, instead of using the upper limit of HCTM, which tends to increase the temperature, the standard use of HCTM, which can suppress the temperature increase more than the upper limit of HCTM, is used.

In the present embodiment, it is determined whether the still image shooting mode, the moving image shooting mode, or the moving image playback is performed. In this case, the HCTM upper limit is used, and in other cases, the HCTM standard is used. However, the present invention is not limited to this, and other modifications can be considered. For example, the HCTM upper limit may be used in the shooting mode without distinguishing between the still image shooting mode and the moving image shooting mode. In addition, in video playback, it is determined whether the video needs to bring out the best performance of the recording media according to the bit rate of the video, the HCTM upper limit is used for the video with a large bit rate, and the video with a small bit rate is used. HCTM may be used as standard.

As described above, in the present embodiment, in S217, the CPU 108 monitors the change of the operation mode and the operation state related to the change of the HCTM standard use and the HCTM upper limit use, and when there is a change, the HCTM standard is processed by the mode determination process. Decide whether to use or to use the HCTM upper limit. Then, in S216, the value of the temperature threshold value in the HCTM function of the recording medium is changed by setting the first value and the second value corresponding to the determined HCTM standard use or HCTM upper limit use. That is, for S216, if the setting before the change and the setting after the change are the same, the processing of S216 may be omitted.

If there is a mode change, the temperature threshold setting for HCTM standard use and HCTM upper limit use is changed, and then the processing in each mode (operating state) is started. Alternatively, the processing of each mode and the setting change of the temperature threshold value may be performed in parallel. However, for moving image reproduction, it is advisable to start the moving image reproduction process after changing the temperature threshold setting.

[Second Embodiment]
In the first embodiment, the settings of the HCTM upper limit use and the HCTM standard use are switched according to whether the operation mode of the image pickup apparatus 100 is the still image shooting mode, the moving image shooting mode, or the moving image reproduction. In the present embodiment, the performance of the recording medium connected to the recording device is measured, and the HCTM temperature threshold value is set according to the measurement result.

<Processing flow for using HCTM function according to performance measurement results>
FIG. 6 is a flowchart of the performance measurement process executed by the image pickup apparatus 100. The processing of each step in this flowchart is realized by the CPU 108 executing a control program stored in the non-volatile memory 113 to control each part of the image pickup apparatus 100. In this flowchart, the processing related to the recording medium is mainly described, but in addition to these processing, shooting processing, image reproduction processing, display processing of captured images and menu screens, menu setting processing, and the like are performed. .. Further, in the description, it is assumed that the present proposal is implemented for the first recording medium 150, and the same processing is performed for the second recording medium 160.

In S601, the media control unit 110 acquires the detailed capacity (media capacity information) of the recording medium 150 as in S203 of the first embodiment. Next, in S201, the CPU 108 has a temperature setting upper limit value (a temperature setting upper limit value) which is information in a range that can be set by setting the temperature of the recording medium 150 from the media capacity information acquired in S601, similarly to S206 of the first embodiment. MXTMT) and the lower limit of temperature setting (MNTMT) are acquired and stored in the RAM 112. Then, in S603, the first media control unit 110 sets the first value and the second value, which are the set temperatures in the HCTM function currently set in the recording medium 150, as in S207 of the first embodiment. It is acquired and stored in the RAM 112 as a default value. The acquired first value is stored in the RAM 112 as DEFAULT_TMT1 and the second value is stored in the RAM 112 as DEFAULT_TMT2.

In S604, the CPU 108 and the first media control unit 110 use the SetFature command to set the first value of the first recording medium 150 to the temperature setting lower limit value (MNTMT) acquired in S602. .. At this time, the second value may be left as the default value (DEFAULT_TMT2) or may be set to the temperature setting upper limit value (MXTMT) acquired in S602. In this way, by setting the lower limit value of the settable range as the first value which is the temperature threshold value at which the first limiting mode is executed in the recording medium, it is easy to shift to the first limiting mode. Is possible.

In S605, the CPU 108 and the first media control unit 110 pass through the first memory controller 152, and the temperature information which is the current temperature of the first recording media 150 from the first media temperature detection unit 154. To get.

In S606, the temperature setting lower limit value (MNTMT) acquired by the CPU 108 in S602 and set as the first value in the first recording medium in S604 is the current temperature of the first recording medium acquired in S605. To compare. When the temperature setting lower limit value (MNTMT) is equal to or lower than the temperature of the first recording medium, the process proceeds to S607, and when the temperature setting lower limit value (MNTMT) is larger than the temperature of the first recording medium, the process proceeds to S618. When the temperature setting lower limit value (MNTMT) is equal to or lower than the temperature of the first recording medium, the first restriction mode is executed when the first recording medium 150 is accessed.

In S607, the CPU 108 generated a dummy file having a specific data size determined in advance, and generated the dummy file in the first NAND type memory unit 153 of the first recording medium 150 via the first media control unit 110. Write a dummy file. When writing a dummy file, the CPU 108 measures the time from the start to the completion of writing. Further, not only the writing but also the reading of the dummy file after writing to the first recording medium is performed, and the time from the start of reading to the completion of reading is also measured.

In S608, the CPU 108 calculates the write or read speed per unit time from the time measured in S607 and the size of the dummy file used. In S604, the first value of the first recording medium 150 is set to MNTMT, and since this value is equal to or lower than the current temperature of the first recording medium, data writing and reading in S607 is the first. This is done while the restricted mode of is running. Therefore, the performance (writing speed, reading speed) of the first recording medium in the first limiting mode can be measured. The CPU 108 stores the write speed and the read speed in the first limited mode in the RAM 112, and proceeds to S609.

In S609 to S614, the CPU 108 determines the value of the HCTM temperature setting based on the write speed and the read speed in the first limited mode measured in S607 and S608.

First, in S609, the CPU 108 determines whether the measured writing speed in the first limiting mode is equal to or higher than the first threshold value, which is the writing speed required in the shooting mode.

If it is determined that the threshold value is equal to or higher than the first threshold value, the process proceeds to S610, and the CPU 108 determines the first value as MNTMT and the second value as MXTMT for the HCTM temperature setting in the shooting mode, and determines the determined value as RAM 112. Record in. When the writing speed in the first limiting mode is equal to or higher than the first threshold value, data can be recorded at a sufficient writing speed even if the first limiting mode is set in the shooting mode. Therefore, by setting the first value to MNTMT (temperature setting lower limit value) in the shooting mode to set the first limiting mode, it is possible to record at a sufficient writing speed and the recording medium. It is possible to suppress the temperature rise of.

If it is determined that the writing speed in the first limiting mode is not equal to or higher than the first threshold value, the process proceeds to S611, and the CPU 108 determines to use the HCTM upper limit for the HCTM temperature setting in the shooting mode. That is, the first value is determined to be MXTMT-1, and the second value is determined to be MXTMT. Then, the value of the HCTM temperature setting at the determined shooting mode is recorded in the RAM 112. When the writing speed is not equal to or higher than the first threshold value, by setting the value for using the HCTM upper limit, the first value becomes a considerably larger value than the setting in S610. Therefore, it is more difficult for the recording medium to shift to the first restricted mode than in the case of the setting of S610, and data recording becomes impossible due to insufficient writing speed as much as possible.

Next, in S612, the CPU 108 determines whether the measured read speed in the first limiting mode is equal to or higher than the second threshold value, which is the read speed required in the reproduction mode.

When it is determined that the read speed in the first limit mode is equal to or higher than the second threshold value, the process proceeds to S613, and the CPU 108 sets the HCTM temperature in the playback mode to MNTMT as the first value and MXTMT as the second value. The determined value is recorded in the RAM 112. When the read speed in the first limit mode is equal to or higher than the second threshold value, data can be reproduced at a sufficient read speed even if the first limit mode is set in the reproduction mode. Therefore, by setting the first value to MNTMT (temperature setting lower limit value) in the playback mode so that the mode becomes the first limiting mode, it is possible to play back at a sufficient read speed and the recording medium. The temperature rise can be suppressed.

When it is determined that the read speed in the first limit mode is not equal to or higher than the second threshold value, the process proceeds to S614, and the CPU 108 determines to use the HCTM standard for the HCTM temperature setting in the reproduction mode. That is, the first value is determined to be DEFAULT_TMT1 and the second value is determined to be DEFAULT_TMT2. Then, the value of the HCTM temperature setting in the determined reproduction mode is recorded in the RAM 112. When the read speed is not equal to or higher than the second threshold value, the value of HCTM standard use is set so that the first value becomes a value larger than the value set in S613. Therefore, it is more difficult for the recording medium to shift to the first restricted mode than in the case of the setting of S613, and it is prevented that the reading speed becomes insufficient. When the read speed is not equal to or higher than the second threshold value, the HCTM temperature setting in the reproduction mode may be set to the HCTM upper limit use instead of the standard use so that the first limit mode is not set. Alternatively, as in the first embodiment, in the case of reading a moving image that requires a large reading speed, the HCTM upper limit may be set, and in other cases, the HCTM standard use may be set.

Next, in S615, the CPU 108 sets the temperature threshold value (first value and second value) of the HCTM temperature setting for the first recording medium 150 by using the SetFeature command. As the value of the temperature threshold value set at this time, a first value and a second value corresponding to the mode of the current imaging device are set. That is, the setting for each mode determined in S610, 611, S613, and S614 and recorded in the RAM 112 is read from the RAM 112 and set in the first recording medium as the temperature threshold value for the HCTM temperature setting. In the above flow, the temperature thresholds (first value and second value) are determined for the shooting mode and the playback mode and recorded in the RAM, but other, for example, the setting mode, HCTM is used as standard. It is advisable to use the value of. Further, in the above flow, the determination is made separately for the shooting mode and the playback mode, but when there are many other modes, the mode for mainly writing data such as the shooting mode and the playback mode such as the playback mode are used. The temperature threshold value (first value and second value) may be determined separately from the mode in which data is mainly read. Next, in S616, the CPU 108 determines whether the mode of the image pickup apparatus 100 has been changed. This process is the same as S217 of the first embodiment. When the mode is changed, the process proceeds to S615, and the temperature threshold values (first value and second value) corresponding to the changed mode are set in the first recording medium. If the mode has not been changed, the process proceeds to S617, and the CPU 108 determines whether or not the power has been turned off. This process is the same as S218 of the first embodiment. If it is determined that the power is off, this process is terminated, and if it is determined that the power is not turned off, the process returns to S616 and the processes of S616, S615, and S617 are repeated.

When it is determined in S606 that the temperature setting lower limit value (MNTMT) is not equal to or lower than the temperature of the first recording medium, the first recording medium is operated in the first limiting mode even if the temperature threshold value of the HCTM is changed. It is not possible to measure the write and read speeds in the first restricted mode. Therefore, in S618, the CPU 108 decides not to use the HCTM function, and in S619, the CPU 108 and the first media control unit 110 do not use the HCTM function for the first recording medium by using the SetFature command. Set to. Then, this process ends. In the present embodiment, it is determined that the temperature setting lower limit value (MNTMT) is not equal to or lower than the temperature of the first recording medium, and even if the temperature threshold value of the HCTM is changed, the write / read speed in the first limit mode is measured. If this is not possible, the HCTM function was disabled. However, instead of disabling the HCTM function, the HCTM upper limit use and the HCTM standard use may be switched according to the mode as in the first embodiment.

In this flow, the performance of the recording medium in the first limiting mode was measured (S07 to S608), and the temperature threshold value was determined according to the measurement result (S609 to S614). The processing of measuring the performance and determining the temperature threshold value according to the measurement result may be performed, for example, after the main power of the image pickup apparatus 100 is turned on (at the time of startup) and immediately before the standby state is entered. Alternatively, it may be performed after the file format of the recording medium (at the time of initialization). Further, even at the time of startup after the power is turned on, the performance may not be measured at the time of high-speed startup, which starts at high speed based on the information at the time of the previous operation, instead of normal startup.

Further, the size of the dummy file used for the performance measurement may be changed according to the timing of the performance measurement. As the data size increases, the measurement time becomes longer, but the measurement data is smoothed and accuracy can be expected to improve. Therefore, the size of the dummy file may be adjusted depending on the situation in consideration of the time required for the performance measurement by this flow.

By storing the performance measurement result once measured, for example, in the non-volatile memory 113, it is possible to reuse the performance measurement result again using the same recording medium. In that case, the performance measurement process according to this flow can be omitted again. Further, the temperature threshold value determined according to the measurement result may be recorded without recording the performance measurement result (write speed, read speed). In that case, not only the performance measurement process but also the temperature threshold determination process according to the measurement result can be omitted.

The performance measurement according to this flow may be performed in the recording of the image data in the photographing mode and the reproduction of the image data in the reproduction mode in the image pickup apparatus 100. In that case, it is possible to carry out by using the image data (image file) used in the actual recording or reproduction instead of the dummy data.

As a typical method of writing data to a recording medium, there are SLC (Single Level Cell) and TLC (Triple Level Cell). For example, when writing with SLC whose writing speed is not stable, the performance is not measured by this flow, but the performance is measured from the time of writing with TLC. By doing so, smoothing of measurement can be expected, and more accurate performance measurement becomes possible. Further, by stopping the performance measurement by this flow at the moment when the image pickup apparatus 100 starts the recording operation, it is possible to control so as not to affect the actual performance in the photographing operation.

If it can be determined that the write speed and read speed obtained by the performance measurement are abnormally slower than the mode assumed by the image pickup apparatus 100, the HCTM function is invalidated so as not to be the first limited mode (the HCTM function is disabled). It may be unused).

Further, in the above-described embodiment, the write speed and the read speed are measured as the performance in the first limited mode, respectively. However, instead of calculating the write speed and the read speed individually, the dummy file is written and read continuously, and the access speed in the first restricted mode is set based on the time from the start of writing to the completion of reading. It may be calculated. In this case, if the access speed is equal to or higher than a predetermined value regardless of the mode without setting the temperature threshold for each mode of the imaging device, MNTMT is set as the first value and the recording medium is always the first limitation. It is good to operate in the mode.

[Other Embodiments]
Although the present invention has been described in detail based on the preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various embodiments within the scope of the gist of the present invention are also included in the present invention. included.

The present invention is also a process in which a program that realizes the functions of the above-described embodiment is supplied to a system or device via a network or a storage medium, and one or more processors in the computer of the system or device reads and executes the program. It is feasible. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

Therefore, in order to realize the functional processing of the present invention on a computer, the program code itself supplied and installed on the computer also realizes the present invention. That is, the computer program itself for realizing the functional processing of the present invention is also included in the present invention.

100 Imaging device 108 CPU
110 First media control unit 111 Second media control unit 112 RAM
113 Non-volatile memory 150 First recording media 160 Second recording media

Claims (14)

A recording device that can access a recording medium
A control means for setting a temperature threshold at which the function is restricted in the recording medium, and
It has a measuring means for measuring the writing speed or reading speed to the recording medium when the function is restricted in the recording medium by writing or reading data of a predetermined size to the recording medium.
The control means is a recording device characterized in that a temperature threshold value at which a function is restricted in the recording medium is set based on a writing speed or a reading speed measured by the measuring means. It has a range acquisition means for acquiring a range of values that can be set as a temperature threshold value at which the function is restricted in the recording medium from the recording medium.
The measuring means writes data of a predetermined size to the recording medium after setting a lower limit value of a range that can be set as a temperature threshold acquired by the range acquisition means as a temperature threshold at which the function is restricted in the recording medium. The recording apparatus according to claim 1, wherein reading is performed to measure the writing speed or reading speed to the recording medium when the function is restricted in the recording medium. When the writing speed measured by the measuring means is larger than the first threshold value, the control means sets a temperature threshold value at which the function is restricted in the recording medium in the mode of writing data to the recording medium. The recording device according to claim 2, wherein the lower limit value of the settable range acquired by the range acquisition means is set. When the writing speed measured by the measuring means is smaller than the first threshold value, the control means sets a temperature threshold value at which the function is restricted in the recording medium in the mode of writing data to the recording medium. The recording device according to claim 3, wherein the recording device is set to a second setting larger than the default value set in the recording medium. Any of claims 2 to 4, wherein the control means controls so that when the writing speed measured by the measuring means is smaller than the second threshold value, the functional limitation according to the temperature threshold value is not executed in the recording medium. The recording device according to item 1. When the reading speed measured by the measuring means is larger than the third threshold value, the control means sets a temperature threshold value at which the function is restricted in the recording medium in the mode of reading data to the recording medium. The recording device according to any one of claims 2 to 5, wherein the lower limit value of the settable range acquired by the range acquisition means is set. When the reading speed measured by the measuring means is smaller than the third threshold value, the control means sets a temperature threshold value at which the function is restricted in the recording medium in the mode of reading data to the recording medium. The recording device according to claim 6, wherein the recording device is set to a second setting larger than the default value set in the recording medium. Any of claims 2 to 7, wherein the control means controls so that when the read speed measured by the measuring means is smaller than the fourth threshold value, the functional limitation according to the temperature threshold value is not executed in the recording medium. The recording device according to item 1. Claim 1 is characterized in that the measuring means measures a writing speed or a reading speed when the function limitation is performed on the recording medium at the time of initializing the recording medium or starting the recording device. The recording apparatus according to any one of 8 to 8. The measuring means measures the writing speed or the reading speed when the function limitation is performed on the recording medium when the recording device is started.
The recording device according to claim 9, wherein when the high-speed start-up of the recording device is executed, the writing speed or the reading speed is not measured by the measuring means. The recording medium is a memory card compatible with the CFexpress standard.
The recording device according to any one of claims 1 to 9, wherein the control means sets the temperature threshold value by using the HCTM (Host Controlled Thermal Management) function. A method of controlling a recording device that can access a recording medium.
A control step for setting a temperature threshold at which the function is restricted in the recording medium, and
It has a measurement step of measuring the writing speed or reading speed of the recording medium when the function is restricted in the recording medium by writing or reading data of a predetermined size to the recording medium.
A control method for a recording device, wherein in the control step, a temperature threshold value at which a function is restricted in the recording medium is set based on a writing speed or a reading speed measured by the measuring means. A program for operating a computer as each means according to any one of claims 1 to 11. A program for causing a computer to execute the control method of the recording device according to claim 12.

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