JP2015182367A - Transfer system and printing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfer system which allows for immediate processing.SOLUTION: A first control circuit interprets the direction data transferred, at a rising edge of the clock pulse on a clock line, together with own first identification data or second identification data in which plural control circuits are specified collectively. A second control circuit interprets the direction data transferred, at a falling edge of the clock pulse on the clock line, together with own first identification data or third identification data in which plural control circuits are specified collectively.

Description

  The present invention relates to a transfer system that transmits data for driving an electric motor, and a printing apparatus including the transfer system.

  Conventionally, various methods for efficiently transferring data while simplifying wiring necessary for data transfer have been attempted (see, for example, Patent Document 1).

JP 2001-217827 A

Assume that the motor driver wiring is shared as a configuration that shares some wiring related to data transfer. Motor driver A and motor driver B drive each motor. In order to facilitate separation of control parameters related to motor control, transfer of control parameters to the other is started after the transfer of control parameters related to motor control to one side is completed.
Here, if a situation occurs in which motor control based on the control parameter must be performed almost at the same time, after the transfer of the control parameter for controlling one motor is started, the control parameter of the other motor is changed. The transfer cannot be started immediately, and a waiting time is generated until the control of the other motor can be started, and the motor may not be controlled at an appropriate timing.

    The present invention has been made in view of the problems that may occur in the configuration in which a part of wiring related to data transfer is shared as described above, and provides a transfer system that enables immediate processing. Objective.

[Application Example 1]
In order to solve the above-described problem, according to one embodiment of the present invention, a plurality of control circuits for controlling an electric motor and a plurality of control circuits connected via one data line and one clock line are connected to each of the control circuits. An identification data for instructing control and a controller for serially transferring the instruction data, and a plurality of the control circuits can each identify first identification data for identifying their own control circuits, The identification data for the first control circuit and the first instruction data are transferred in association with the first data line with respect to the rising edge of the clock pulse in the one clock line, and the clock pulse in the first clock line is transferred. Identification data for the second control circuit with respect to the falling edge of The instruction data of 2 is transferred in association with the first data line, and the first control circuit is configured to detect the first identification data of the first clock line or the plurality of instruction data with respect to a rising edge of the clock pulse in the first clock line. The instruction data transferred together with the second identification data for collectively specifying the control circuit is interpreted, and the second control circuit is self-first with respect to the falling edge of the clock pulse in the one clock line. The instruction data transferred together with the identification data or the third identification data for collectively specifying a plurality of control circuits is interpreted.

In the invention configured as described above, the first control circuit and the second control circuit may be configured such that the first identification data or the plurality of controls is applied to the rising or falling edge of the clock pulse in one clock line. The instruction data transferred together with the second or third identification data for designating the circuits collectively is interpreted.
Therefore, while the data line is shared, the control unit can interpret the self-addressed data transmitted on the data line by the first identification data. When the instruction data is transferred together with the second or third identification data, the instruction data can be transferred to a plurality of control circuits.
In other words, even when a data line is shared by a plurality of control circuits, transfer of instruction data to individual control circuits and batch transfer to a plurality of control circuits can be used properly. It can be done flexibly.

[Application Example 2]
In one aspect of the present invention, the second identification data and the third identification data are the same data.
In the invention configured as described above, the instruction data can be transferred to all the control circuits by one identification data.

[Application Example 3]
In one aspect of the present invention, the instruction data corresponding to all the control circuits is data for stopping the electric motor.
In the invention configured as described above, the time required for stopping the electric motor can be shortened.

[Application Example 4]
In one aspect of the present invention, the controller transmits the second identification data and instruction data for all control circuits in one data line during a period including a rising edge and a falling edge of a clock pulse in the one clock line. Transfer in association with.
In the invention configured as described above, the data transfer width can be shortened to shorten the time required for the transfer.

  In addition, the present invention can be regarded not only as a transfer system but also as a printing apparatus including a part of such a transfer system.

1 is a diagram illustrating a configuration of a printing apparatus. The figure which shows a part of hardware which controls a motor drive. The figure explaining the transfer data 100 structure transferred to the motor drivers 210-260 from SOC50. The figure explaining the structure of a motor driver. The figure which shows the example of a format of the data transferred between SOC and a motor driver. The figure which shows an example of the process performed when setting the parameter of a motor driver. FIG. 4 is a diagram illustrating an example of a printing process performed by a sheet feeding unit and a carriage unit. The figure which shows an example of the process performed when stopping each motor collectively.

Hereinafter, embodiments of the present invention will be described in the following order.
1. First embodiment:
(1) Configuration of printing apparatus (2) Outline of transfer process (3) Parameter setting process (4) Print control Second embodiment:
3. Other embodiments:

1. First embodiment:
(1) Configuration of Printing Apparatus FIG. 1 is a diagram illustrating a configuration of a printing apparatus.
The printing apparatus 10 is a multifunction machine having a FAX function, a printing function, and a scanner function. The printing apparatus 10 includes a housing 11, a scanner unit 20 provided on the top of the housing 11, a printing unit 30 that is provided inside the housing 11 and performs printing on paper, and is provided inside the housing 11. A transport unit 40 that supplies paper to the printing unit 30.

  The scanner unit 20 scans a document set on a document table (not shown) and converts it into data. The scanner unit 20 includes a scanner unit 21, mirrors 22 and 23, a lens 24, and a CCD image sensor 25. In the scanner unit 20, the scanner unit 21 moves in the scanning direction to read a document. Document data read by the scanner unit 21 is collected by the lens 24 via the mirrors 22 and 23 and input to the CCD image sensor 25. Hereinafter, the data scanned by the scanner unit 20 is also referred to as document data.

  The transport unit 40 includes a tray 41 on which paper is set, paper feed rollers 42 and 43 that supply the paper set on the tray to the transport path, and a transport roller 44 that feeds the fed paper to the printing unit 30. , 45.

  In the present embodiment, an example of an inkjet print head that performs scanning is described as an example of the printing unit 30. The printing unit 30 includes a print head 31 that records ink on a sheet fed by the transport unit 40 and a carriage 32 that reciprocates the print head 31. The carriage 32 fixes the print head 31 with the ink ejection surface of the print head 31 facing downward. The carriage 32 reciprocates in the scanning direction. Further, the print head 31 records ink on the paper in synchronization with the carriage 32 and the conveyance of the paper.

FIG. 2 is a diagram illustrating a part of hardware for realizing a data transfer function related to each motor control in the transport unit 40, the carriage 32, and the scanner unit 21.
The SOC 50 is a controller that controls a motor by including a central processing unit (CPU) 60, an arbitration circuit (arbiter) 70, a memory and a controller circuit (not shown), and the like. The output port of the SOC 50 is connected to a plurality of motor drivers 210 to 260.

  The CPU 60 has a plurality of registers. The transfer data 100 and the flag are recorded in each register by the CPU 60 that executes a predetermined program (for example, firmware for operating the printing apparatus 10), and the transfer data and the flag recorded in each register are sequentially stored. , And output to the arbitration circuit 70 in the subsequent stage.

  Information corresponding to the motor drivers 210 to 260 is recorded in each register of the CPU 60. For example, transfer data 100 for the motor driver 210 is recorded in a first register (not shown), and transfer data 100 for the motor driver 220 is recorded in a second register (not shown). The arbitration circuit 70 outputs the transfer data 100 from each register according to the priority of the transfer data 100 recorded in each register.

The motor drivers 210 and 230 are connected to the paper feed motors 310 and 330 that drive the paper feed rollers 42 and 43 of the transport unit 40, respectively, and control the rotation of the paper feed motors 310 and 330.
Further, the motor drivers 220 and 240 are connected to the transport motors 320 and 340 that drive the transport rollers 44 and 45 of the transport unit 40, respectively, and control the rotation of the transport motors 320 and 340.
The motor driver 250 is connected to a carriage motor 350 that drives the carriage 32, and controls the rotation of the carriage motor 350.
The motor driver 260 is connected to the scanner motor 360 that drives the scanner unit 21 and controls the rotation of the scanner motor 360.

Each motor driver assumes an IC configured separately from the SOC 50, but may be incorporated in the SOC. In this embodiment, the scanner motor 360 is assumed to be a stepping motor. The paper feed motors 310 and 330, the transport motors 320 and 340, and the carriage motor 350 are assumed to be direct current motors (DC motors) that are driven by direct current, but are not limited to these as long as they are electric motors.
In the present embodiment, the first control circuit is the motor drivers 220 and 240, and the second control circuit is the motor drivers 210 and 230.

  Data transfer between the SOC 50 and each motor driver 210 to 260 adopts a serial interface method, and data transfer is performed using three lines of a clock line (CLK), a data line (DATA), and a load line (LD). Is done. The SOC 50 uses only one line for data transfer, and the CLK, DATA, and LD lines are each branched into six branches and connected to the motor drivers 210 to 260.

Next, the configuration of the transfer data 100 transferred between the SOC 50 and the motor drivers 210 to 260 will be described.
FIG. 3 is a diagram for explaining the configuration of transfer data 100 transferred from the SOC 50 to the motor drivers 210 to 260. FIG. 3A shows a data format. FIG. 3B is a diagram for explaining a motor driver designated by the identification ID 110.

  As shown in FIG. 3A, the transfer data 100 includes an identification ID 110 and instruction data 120. The identification ID 110 is information for specifying the destination motor driver. The instruction data 120 is information defining an instruction to be executed by the motor driver. For example, the identification ID 110 is composed of the first 3 bits of one transfer data 100. In addition, the instruction data 120 is composed of the last 18 bits compared to the identification ID 110.

  Each value of the identification ID 110 corresponds to each motor driver. In the first embodiment, “0” in the identification data is a number common to a plurality of drivers (hereinafter also referred to as a common ID), and “1” to “6” are the numbers of the motor drivers. It is an individual number (hereinafter also referred to as an individual ID).

Further, as shown in FIG. 3B, even when the identification ID is the common ID “0”, the corresponding motor driver varies depending on the change of the edge (falling, rising) of the clock pulse flowing through the clock line CLK. . Hereinafter, the change in the edge of the clock pulse combined when the common ID “0” is distinguished is also referred to as an identification CLK edge. That is, the case where the transfer data 100 is synchronized with the falling edge of the clock pulse with the common ID “0” is described as “the falling edge of the identification CLK”. A case where the transfer data 100 is synchronized with the rising edge of the clock pulse with the common ID “0” is described as “rising edge of identification CLK”.
In other words, when the identification CLK edge falls with the common ID “0”, the motor drivers 210 (identification ID “1”), 230 (identification ID “3”), 250 (identification ID “5”) with the odd individual IDs. The common identification data. In the present embodiment, the motor drivers 210, 230, and 250 whose individual IDs are odd numbers (“1”, “3”, and “5”) are circuits that control the motors 310, 330, and 350, respectively.
In addition, when the identification CLK edge rises with the common ID “0”, the identification data is common to the motor drivers 220 (“2”) and 240 (“4”) whose individual IDs are even numbers. In this embodiment, the motor drivers 220 and 240 whose individual IDs are even numbers (“2” and “4”) are circuits for controlling the motors 320 and 340, respectively.

Therefore, the first identification data of the present invention is identification IDs “1” to “6”. The second identification data and the third identification data are either the identification CLK edge falling at the identification ID “0” or the identification CLK edge rising at the identification ID “0”.
In this embodiment, when the identification CLK edge rises with identification “0”, the motor driver 260 that drives the stepping motor (scanner motor 360) is not targeted, but is not limited thereto, and the motor driver 260 is targeted. It may be.

The instruction data 120 includes a setting command for setting the motor driver and a driving command for controlling driving of the motor driver.
The setting command includes a “current parameter” for setting a supply method of a current supplied to drive each motor, and a “stop parameter” for specifying a motor stop method. The drive command includes commands of “constant speed control”, “constant speed second control”, “regenerative brake”, “short brake”, and “brake end”.

  Data processed by each of the motor drivers 210 to 260 is composed of a plurality of bit strings. In the present embodiment, a mode configured in units of 21 bits, that is, units of 3 bytes is assumed. It may be data having a smaller or larger number of bits, or may be data having a variable number of bits depending on the mode of commands, parameters, and the like.

  The amount of data transferred between the SOC 50 and the motor drivers 210 to 260 varies depending on the operation of the printing apparatus. For example, when copying a document with a printing apparatus, the scanner unit 21 needs to move with high accuracy while reading along the document. Accordingly, the SOC 50 sends drive instruction data to the motor driver 260 for each unit control step such as phase switching in order to drive the stepping motor, which is the scanner motor 360, with high accuracy.

  Further, in order to sequentially print the image data of the read original, the SOC 50 provides drive commands for driving the paper feed motors 310 and 330, the transport motors 320 and 340, and the carriage motor 350, respectively, to the motor drivers 210 to 250. Send to. Accordingly, the SOC 50 asynchronously instructs the motor driver 260 to drive the scanner motor 360 and the motor drivers 210 to 250 to drive the paper feed motors 310 and 330, the transport motors 320 and 340, or the carriage motor 350. Depending on the case, control based on the control command may be instructed substantially simultaneously. (In this embodiment, motor control parameters such as drive instruction data for stepping motors and command data for DC motors transferred by the SOC 50 may be referred to as “data”, “command”, “parameter”, etc.).

Next, the configuration of the motor driver that processes such transfer data 100 will be described. FIG. 4 is a diagram illustrating the configuration of the motor driver. Hereinafter, the configuration of the motor driver 220 will be described as an example. The configuration of the other motor drivers is the same, and the description is omitted.
The motor driver 220 includes a clock determination unit 221, a serial / parallel conversion unit 222, an ID determination unit 223, a current generation unit 224, and an ID setting unit 225. Each part constituting the motor driver 220 is constituted by hardware such as a well-known electronic component.

  The clock pulse input through the clock line CLK is input to the clock determination unit 221. The clock determination unit 221 detects the rising or falling edge of the clock pulse and outputs a determination signal according to the determination. As described above, the clock determination unit 221 included in the motor drivers 210, 230, and 250 having the odd identification ID detects the falling edge of the clock pulse. In addition, the clock determination unit 221 included in the motor drivers 220, 240, and 260 having the even identification ID detects the rising edge of the clock pulse.

  Further, the transfer data 100 input through the data line DATA is input to the pre-stage unit 222 a of the serial / parallel conversion unit 222. In the serial / parallel converter 222, the front stage 222a is connected to the data line DATA and the output side of the clock determination unit 221, and the rear stage 222b is connected to the load line LD, the ID determination unit 223, and the current generation unit 224. The pre-stage unit 222 a of the serial / parallel conversion unit 222 can record 21-bit information constituting one transfer data 100. In synchronization with the input of the determination signal from the clock determination unit 221, the front-stage unit 222a outputs the recorded 21-bit information (transfer data 100) to the rear-stage unit 222b. Then, in synchronization with the input of the load signal input through the load line LD, the transfer data 100 is output in parallel.

  The ID determination unit 223 is connected to the upper 3 bits of the rear stage unit 222b, and records the upper 3 bits output from the rear stage unit 222b. As described above, the upper 3 bits of the transfer data 100 are the identification ID 110. Therefore, the ID determination unit 223 compares the information of the identification ID 110 with the identification information of the motor driver 220 (information input from the ID setting unit 225), and outputs an ID determination signal if they match. Further, the ID determination unit 223 functions similarly to its own identification number even when the identification ID 110 is a common ID (“0” in FIG. 3B). As an example, in this embodiment, the ID determination unit 223 compares the lower 1 bit of the common ID with the lower 1 bit of the identification information of each motor driver, and outputs an ID determination signal when the comparison results match. .

  The ID setting unit 225 includes, for example, three setting pins, and sets identification information of the motor driver 220 according to a combination of voltage values of the setting pins. For example, if the identification information of the motor driver 220 is “3” (011), the voltage value combinations of the setting pins are “low”, “high”, and “high”. The setting pin is connected to a circuit (not shown).

  The current generation unit 224 is connected to the part to which the lower 18 bits of the rear stage part 222 b of the serial / parallel conversion unit 222 are input and the ID determination unit 223. As described above, the lower 18 bits of the transfer data 100 correspond to the instruction data 120. When receiving the instruction data 120, the current generation unit 224 interprets the instruction data 120, and outputs a current and sets parameters in synchronization with the ID determination signal output from the ID determination unit 223.

(2) Outline of Transfer Process Next, an outline of a data transfer process performed between the SOC 50 and the motor drivers 210 to 260 will be described.
FIG. 5 is a diagram illustrating a format example of data transferred between the SOC 50 and the motor driver 210 and the motor driver 220. The data of the motor driver 210 (the identification ID is an odd number) is associated with the DATA bit value when the clock pulse flowing through the clock line CLK falls (t2, t4,..., T16). The data of the motor driver 220 (the identification ID is an even number) is set to the bit value of the transfer data 100 flowing on the data line DATA at the rising edge of the clock pulse flowing on the clock line CLK (t1, t3,..., T15). It is associated. That is, the SOC 50 causes a value obtained by logically adding a bit value that is data for the motor driver 210 and a bit value that is data for the motor driver 220 to the data line DATA.

  In addition, a bit string delimiter of one data composed of a plurality of bit data is associated with a load signal flowing through the load line LD. In the present embodiment, if the LD is ON at the rising edge of CLK, the data delimiter of the motor driver 220 is shown, and if the LD is ON at the falling edge of CLK, the data delimiter of the motor driver 210 is shown. Therefore, when the motor driver 210 and the motor driver 220 detect a data break, the motor driver 210 and the motor driver 220 recognize the bit string acquired so far as one piece of data. In other words, this LD signal is transferred at one time or divided into a plurality of times in correspondence with the edge of the clock pulse, and defines the range of the acquired bit data. It has a function of defining a range as a unit.

(3) Parameter Setting Process Next, a parameter setting method using the data transfer process of the present invention will be described. FIG. 6 is a diagram illustrating an example of processing performed when setting parameters of the motor driver. The process shown in FIG. 6 is a case where settings are made for the paper feed motors 310, 330, and 350, and targets the motor drivers 210, 230, and 250.

  The SOC 50 causes the transfer data 100 having the identification ID 110 as the common ID “0”, the identification CLK edge to fall, and the instruction data 120 as the “parameter” to flow on the data line DATA. The instruction data 120 is a command for setting common parameters of the current generation unit 224 for the motor driver 210, the motor driver 230, and the motor driver 250. For example, a method for controlling the current supplied to each motor 310, 330, 350 is set by this “parameter”.

  When the identification ID 110 is the common ID “0” and the identification CLK edge falls, the motor drivers 210, 230, and 250 whose identification ID 110 is “1”, “3”, and “5” flow through the clock line CLK. The transfer data 100 is received at the falling edge of the clock pulse. Then, the motor drivers 210, 230, 250 interpret the instruction data 120 (parameters) of the transfer data 100 and make settings. In FIG. 6, the motor driver 210, the motor driver 230, and the motor driver 250 set the parameters of the current generation unit 224 in the parameter setting 1 and the parameter setting 2.

As an example of the method set by `` parameter '', the block time for masking the rising noise of the current value, the off time for controlling the current peak, the duty for setting the current value, This is the method for stopping the motor (regenerative braking, short braking), etc.
In addition, although explanation is omitted, when setting related to the transport motors 320 and 340 (or 320, 340 and 360), the transfer data 100 is transferred by using the rising edge of the identification CLK edge with the common ID “0”. Thus, the setting can be made for the motor drivers 220, 240 (or 220, 240, 260).
The parameter setting process has been described above.

(4) Printing Control Next, printing control by the motor drivers 220 and 240 and the motor driver 250 will be described. FIG. 7 is a diagram illustrating an example of a printing process performed in cooperation between the transport unit and the carriage unit. Note that FIG. 7 mainly describes the motor driver 220 in order to simplify the description.

  The data group transferred from the SOC 50 to the motor drivers 220 and 240 and the motor driver 250 is a command group which is a control parameter for any of the transport motors 320 and 340 or the carriage motor 350. FIG. 7 is a flowchart for instructing the actual driving of the DC motor, which is necessary for realizing each process such as “sub-scanning”, “main scanning + printing”, and “sub-scanning” as operations of the printing apparatus 10. The command to be used is shown corresponding to each process. Here, for example, when the motor is a stepping motor (for example, 4W1-2 phase excitation method), command transfer is required 64 times to make one rotation of the motor shaft, and command transfer is compared with control of the DC motor. The frequency is relatively high.

  In the first “sub-scanning”, the first area of the paper is moved to the printing position at a constant speed by driving the conveyance motor 320. In “main scanning + printing”, printing is executed by an ink ejection operation on the first region while the print head unit is moved at a constant speed by driving the carriage motor 350. In the last “sub-scanning”, the conveyance motor 320 is driven to move the second area to be printed following the first area of the paper to the printing position.

  Motor processes that execute “sub-scan” include “constant speed control”, “constant speed second control”, “regenerative brake”, and “short brake”, and the SOC 50 provides commands for instructing these processes. Then, it is transferred to the motor driver 220 to be reflected in the actual drive of the transport motor 320. In addition, the SOC 50 is a motor process for executing “main scanning + printing”. “Constant speed on”, “Constant speed control”, “Constant speed off”, “Regenerative brake”, “Short brake” and “Brake” The SOC 50 transfers a command for instructing these processes to the motor driver 250 to reflect the actual driving of the carriage motor 350.

As a method of controlling the current supplied to each motor, a method of controlling by separately providing an enable line for controlling the interruption of the current supplied to each motor so as to rotate the transport motor 320 and the carriage motor 350 at a constant speed. It is also possible to transfer a command from the SOC 50 to the motor driver 250, set data related to the time of constant speed rotation indicated by the command in a predetermined area of the register, and refer to the data to A method of controlling the intermittent current supplied to the motor may be used. In the latter case, the number of wires in the printing apparatus can be reduced, and the ON / OFF cycle and duty of the enable line may be set and driven. The enable control may change in synchronization with the ON / OFF cycle on the motor driver side.
The print control has been described above.

As described above, the first embodiment has the following effects.
When one data transfer line is branched and data is transferred from the SOC 50 to each motor driver 210 and motor driver 220, the SOC 50 has the motor driver 210 and motor driver 220 at the falling and rising timings of the clock pulse. The data is transferred so as to correspond to any of the data. Therefore, data can be selectively transferred to a plurality of slaves without increasing the number of connections.

  If data transfer is required from the SOC 50 to the motor driver 220 while the data is being transferred from the SOC 50 to the motor driver 210 in association with the falling edge of the clock pulse, the data transfer to the motor driver 210 is completed. The data transfer to the motor driver 220 can be started in association with the rising edge of the clock pulse without waiting for. Therefore, it is possible to avoid delays in processing of the printing apparatus and the inability to control each motor while the motor driver 220 is on standby.

While making the data line common, it is possible to interpret the designation command addressed to itself transmitted by this data line by the identification ID. When the instruction data is transferred together with the common ID, the instruction data can be transferred to a plurality of control circuits.
In other words, even when a data line is shared by a plurality of control circuits, transfer of instruction data to individual control circuits and batch transfer to a plurality of control circuits can be used properly. It can be done flexibly.

2. Second embodiment:
A common ID that is common to all the motor drivers 210 to 260 may be set in the identification ID 110 of the transfer data 100.
In particular, it is beneficial to provide a common ID when transferring instruction data 120 for emergency stop of all motors provided in the printing apparatus 10.

A parameter setting method using the data transfer process of the present invention will be described. FIG. 8 is a diagram illustrating an example of processing performed when stopping the motors collectively.
In the example illustrated in FIG. 8, the common ID for the motor drivers 210 to 260 is “0”. The instruction data 120 transferred with the common ID “0” is “brake”.

  The SOC 50 sets the identification ID 110 to the common ID “0”, sets the instruction data 120 to “brake”, and transfers the transfer data 100 to the data line DATA in synchronization with the clock pulse flowing on the clock line CLK. In the second embodiment, since all the motor drivers 210 to 260 that capture the transfer data 100 at the rising edge and the falling edge are targeted, the clock pulse flowing through the clock line CLK is from before the rising edge to after the falling edge, or The transfer data 100 having the identification ID 110 as the common ID “0” and the instruction data 120 as “brake” continues to flow through the data line DATA from before the falling of the clock pulse flowing through the clock line CLK to after the rising. That is, the position where the transfer data 100 is synchronized with the clock pulse does not matter.

  By setting the identification ID 110 to the common ID “0”, the motor driver that sets the individual IDs to odd numbers (“1”, “3”, “5”) takes in the transfer data 100 at the falling edge of the clock pulse, and individually The motor driver whose ID is an even number (“2”, “4”, “6”) captures the transfer data 100 at the rising edge of the clock pulse. The motor drivers 210 to 260 interpret the instruction data 120 (brake) of the transfer data 100 and stop the motors 310 to 360. In FIG. 8, all the motor drivers 210 to 260 execute a brake command.

  As described above, in the second embodiment, the time required for stopping the motor can be shortened. In particular, when the apparatus is stopped urgently, the motor drive time can be shortened, so that the safety of the apparatus can be improved.

3. Other embodiments:
Although the embodiment of the present invention has been described with reference to the drawings, the specific configuration is not limited to this embodiment, and includes design changes and the like within a scope not departing from the gist of the present invention. For example, the application of the transfer system is not limited to a printing apparatus, and may be applied to an image display apparatus such as a projector, various information processing apparatuses, and the like.
Further, the motor is not limited to a mode of rotating, and a mode of linear driving such as a linear motor can be assumed.
Moreover, the apparatus which implements the above methods may be realized by a single apparatus or may be realized by combining a plurality of apparatuses, and includes various aspects.
Each configuration in each embodiment and a combination thereof are examples, and addition, omission, replacement, and other changes of the configuration can be made without departing from the spirit of the present invention. In addition, the present invention is not limited to the embodiments, and is limited only by the scope of the claims.

  DESCRIPTION OF SYMBOLS 10 ... Printing apparatus, 11 ... Housing, 20 ... Scanner part, 21 ... Scanner unit, 22, 23 ... Mirror, 24 ... Lens, 25 ... CCD image sensor, 30 ... Printing part, 31 ... Print head, 32 ... Carriage, 40 ... Transport section, 41 ... Tray, 42, 43 ... Feed roller, 44, 45 ... Convey roller, 50 ... SOC, 60 ... CPU, 70 ... Arbitration circuit, 100 ... Transfer data, 120 ... Instruction data, 210-260 ... Motor driver, 221... Clock determination unit, 222... Serial / parallel conversion unit, 222 a .. front stage unit, 222 b .. subsequent stage unit, 223... ID determination unit, 224. 320 ... Conveyance motor, 330 ... Feeding motor, 340 ... Conveyance motor, 350 ... Carriage motor, 60 ... scan motor

Claims (5)

A plurality of control circuits for controlling the electric motor;
A controller for serially transferring identification data and instruction data for instructing control of the electric motor to each of the plurality of control circuits connected via one data line and one clock line,
A plurality of control circuits each capable of identifying first identification data for identifying their own control circuits;
The controller transfers identification data for the first control circuit and the first instruction data in association with the first data line with respect to the rising edge of the clock pulse in the first clock line, and transfers the first clock to the first clock line. Transferring the identification data for the second control circuit and the second instruction data in association with the first data line with respect to the falling edge of the clock pulse in the line;
The first control circuit transfers the instruction data transferred together with its first identification data or second identification data for collectively specifying a plurality of control circuits with respect to a rising edge of the clock pulse in the one clock line. Interpret
The second control circuit transmits the instruction transferred together with its first identification data or third identification data collectively specifying a plurality of control circuits with respect to a falling edge of the clock pulse in the one clock line. A transfer system characterized by interpreting data.   The transfer system according to claim 1, wherein the second identification data and the third identification data are the same data.   The transfer system according to claim 2, wherein the instruction data corresponding to all the control circuits is data for stopping the electric motor.   The controller transfers the second identification data and instruction data for all control circuits in association with one data line during a period including a rising edge and a falling edge of a clock pulse in the one clock line. The transfer system according to any one of claims 1 to 3, wherein the transfer system is configured as described above.   A printing apparatus comprising the transfer system according to claim 1.

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