CN106066835A - Combined chip suitable for USB connector - Google Patents

Abstract

The invention discloses a combined chip suitable for a USB connector. The combined chip comprises a USB type-C circuit, a USB non-type-C circuit, a change-over switch unit connected between the USB type-C circuit and the USB non-type-C circuit and a mode control unit connected to a control end of the change-over switch circuit. After executing one or more mode judging programs, the mode control unit controls the switch circuit to enable the USB type-C circuit to be connected to the first pin and the second pin, and the USB non-type-C circuit is disconnected to the first pin and the second pin, or the USB non-type-C circuit is connected to the first pin and the second pin, and the USB type-C circuit is disconnected to the first pin and the second pin.

Description

Combo Chips for USB Connectors

technical field

The invention relates to a combined chip suitable for a universal serial bus (USB) connector, in particular to a combined chip suitable for a USB connector which enables different operation modes to share pins of the chip.

Background technique

With the development of technology, the transmission interface of electronic products tends to integrate all functions into one transmission interface. Among various transmission interfaces, the most widely used one should be the USB transmission interface. Currently, the mechanical standard of the USB has been developed to the so-called type-C, which has 24 pins and can support quite a variety of working modes.

Most chips currently used for USB connectors have pins of the chip corresponding to different working modes of the USB. However, as mentioned above, since the current USB supports a large number of functions or operating modes, if the pins of the chip are respectively corresponding to different operating modes of the USB, the number of pins on the chip will be too large, and the packaging size of the chip Costs will also increase accordingly. In addition, since the length of the bonding wires connected to the pins of the chip will also increase accordingly, the performance of the chip may be seriously affected in high-frequency applications.

Contents of the invention

In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide a combined chip suitable for a USB connector to solve the problem that different functional circuits use different chip pins.

According to an object of the present invention, a combined chip is proposed. The combined chip is suitable for a USB connector and includes a USB type-C circuit, a USB non-type-C circuit, a switch unit connected to the USB type-C circuit and a USB non-type-C circuit, and a control connected to the switch circuit terminal mode control unit. After the mode control unit executes one or more mode judgments, it controls the switch circuit so that the USB type-C circuit is connected to the first pin and the second pin, and the USB non-type-C circuit is disconnected between the first pin and the second pin. pins, or the USB non-type-C circuit is connected to the first pin and the second pin, and the USB type-C circuit is disconnected to the first pin and the second pin.

Preferably, the mode control unit can be connected to the USB type-C circuit. One or more mode judging procedures may include alternative (ALT) mode judging procedures, if the result of the ALT mode judging procedure is yes, the mode control unit connects the first pin and the second pin to the USB type-C circuit, and connects the USB The type-C circuit is configured as a GPIO mode. If the result of the ALT mode judgment procedure is negative, the mode control unit connects the first pin and the second pin to the USB non-type-C circuit.

Preferably, after the ALT mode judgment program result is yes and the mode control unit connects the first pin and the second pin to the USB type-C circuit, the mode control unit can execute the GPIO mode judgment program, if the GPIO mode judgment program result If yes, the mode control unit configures the USB type-C circuit in GPIO mode, and if the result of the GPIO mode judgment procedure is negative, the mode control unit configures the USB type-C circuit in a debug port mode.

Preferably, after the result of the GPIO mode judgment program is No and before the mode control unit configures the USBtype-C circuit as the debug port mode, the mode control unit can execute the debug mode judgment program, if the result of the debug mode judgment program is Yes , the mode control unit configures the USB type-C circuit as a debug port mode, and if the result of the debug mode judgment program is negative, the mode control unit configures the USB type-C circuit as an RS232 interface mode.

Preferably, after the result of the debugging mode judgment program is No and before the mode control unit configures the USBtype-C circuit to the RS232 interface mode, the mode control unit can execute the RS232 mode judgment program, if the RS232 mode judgment program result is Yes, then The mode control unit configures the USBtype-C circuit as the RS232 interface mode. If the result of the RS232 mode judgment procedure is negative, the mode control unit resets and re-executes one or more mode judgment procedures.

Preferably, before the mode control unit executes the ALT mode judgment program, the mode control unit can first execute the power delivery (PD) connection mode judgment program, if the result of the PD connection mode judgment program is yes, then the mode control unit executes the ALT mode judgment program , if the result of the PD connection mode judging procedure is negative, the mode control unit executes the troubleshooting mode judging procedure.

Preferably, before the mode control unit executes the PD connection mode judgment program, the mode control unit can first execute the type-C connection mode judgment program, and if the result of the type-C connection mode judgment program is yes, then the mode control unit executes the PD connection mode judgment program, if the result of the type-C connection mode judging program is negative, the mode control unit executes the RS232 mode judging program.

Preferably, the mode control unit can be connected to the USB type-C circuit and the USB non-type-C circuit. After the first pin and the second pin are connected to the USB type-C circuit or the USB non-type-C circuit, the second The first pin and the second pin supply signals to the USB type-C circuit or the USB non-type-C circuit. After the first pin and the second pin stop supplying signals to the USB type-C circuit or the USB non-type-C circuit, the mode control unit can reset and re-execute one or more mode determination procedures.

Based on the above, according to the combined chip suitable for the USB connector of the present invention, it can have one or more of the following advantages:

(1) The combined chip can execute a mode judgment program through the signal input to the mode control unit, thereby allowing the USB type-C circuit with mutually exclusive functions to share the chip pins with the USB non-type-C circuit.

(2) The combined chip can further execute multiple mode judgment programs, so that the USB type-C circuit can be configured as a circuit corresponding to different functions in the same chip according to the needs of users.

Description of drawings

FIG. 1 is a schematic diagram of a first embodiment of the combined chip of the present invention.

FIG. 2 is a schematic diagram of a second embodiment of the combined chip of the present invention.

FIG. 3 is a schematic diagram of a third embodiment of the combined chip of the present invention.

FIG. 4 is a flow chart of a mode judgment program applicable to the combined chip of the present invention.

Explanation of reference signs:

10: The first pin

20: Second pin

100: mode judgment unit

200: USB type-C circuit

210: GPIO mode

211: Power Delivery Mode

212: type-C audio mode

220: RS232 interface mode

230: Debug port mode

300: USB non-type-C circuit

400: Toggle switch unit

401: Control terminal

detailed description

In order to facilitate the examiner to understand the technical features, content and advantages of the present invention and the effects it can realize, the present invention is hereby combined with the accompanying drawings, and described in detail as follows in the form of embodiments, and the accompanying drawings used herein, its The subject matter is only for illustration and auxiliary instructions, and may not be the real proportion and precise configuration of the present invention after implementation, so the scale and configuration relationship of the attached drawings should not limit the patent scope of the present invention in actual implementation. Description.

Embodiments of the combined chip according to the present invention will be described below with reference to related drawings. For ease of understanding, the same components in the following embodiments are described with the same symbols.

Please refer to FIG. 1 , which is a schematic diagram of a first embodiment of the combined chip of the present invention. In the figure, the combined chip includes a USB type-C circuit 200, a USB non-type-C circuit 300, a switch unit 400 connected to the USB type-C circuit 200 and a USB non-type-C circuit 300, and a switch unit connected to the switch circuit 400. The mode control unit 100 of the control terminal 401 . After the mode control unit 100 executes one or more mode judgments, it controls the switch circuit 400 to connect the USB type-C circuit 200 to the first pin 10 and the second pin 20, and the USB non-type-C circuit 300 is disconnected at the second pin. One pin 10 and the second pin 20, or the USB non-type-C circuit 300 is connected to the first pin 10 and the second pin 20, and the USB type-C circuit 200 is disconnected between the first pin 10 and the second pin Two pins 20.

In this embodiment, the mode control unit 100 can perform one or more mode judgments according to external signals, so that one of the USB type-C circuit 200 or the USB non-type-C circuit 300 is connected to the first pin 10 and the first pin 10. The second pin 20 and the other one are disconnected from the first pin 10 and the second pin 20 . Since the functions of the USB type-C circuit 200 and the USB non-type-C circuit 300 are mutually exclusive, only one of them needs to be connected to the pin of the chip at the same time, so that the chip can operate normally according to a predetermined mode. Here, the external signal input to the mode control unit 100 may be a signal from the cc pin of the USB type-C connector. When the USB type-C connector is connected to the corresponding connection device, a so-called handshake will be performed between the devices ( handshaking) protocol to confirm the mode executed by both parties. When performing handshaking, the cc pin of the USB type-C connector will have a signal input, so the mode control unit 100 can determine the next combination according to the information contained in this signal, such as voltage or current value To determine what functions the chip needs to provide, the corresponding circuit is connected to the pins of the chip. However, the combined chip of the present invention is not limited thereto. If the pins of the USB connector have different configurations for different operation modes, the mode control unit 100 may also use the pin configuration of the USB connector as the execution judgment. Program's incoming signal. In this embodiment, unused circuits can be turned off by the combined chip, and wake up again when they need to be used next time. In this way, there is no need to separately design dedicated chip pins for the USB type-C circuit 200 and the USB non-type-C circuit 300, but the USB type-C circuit 200 and the USB non-type-C circuit 300 share a combined chip The pins in the figure are the first pin 10 and the second pin 20 in the figure. In the current design for the USB connector, the USB type-C circuit 200 and the USB non-type-C circuit 300 are disposed in different blocks of the chip and connected to the outside through different chip pins. However, by adopting the chip design of the embodiment of the present invention, circuits with different functions can be combined together, thereby reducing the number of chip pins and the area occupied by the circuits. When the chip is packaged as a whole later, the length and quantity of bonding wires required can also be reduced accordingly, thereby improving high-frequency performance.

In this embodiment, the switching unit 400 may include a plurality of switching elements, and the switching element may be a single electronic circuit element, such as a metal oxide semiconductor field effect transistor (MOSFET). At this time, the control terminal 401 can be connected to the gate of the MOSFET, and the conduction state of the MOSFET source and drain can be changed by the bias voltage from the mode control unit 100, thereby controlling the USB type-C circuit 200 or the USB non-type- The state of connection between the C circuit 300 and the first pin 10 and the second pin 20 . However, the combined chip of the present invention is not limited thereto, and other elements or circuits with switching functions can also be used in the switching unit 400 of the present invention.

Please refer to FIG. 2 , which is a schematic diagram of a second embodiment of the combined chip of the present invention. In the figure, the mode control unit 100 can be connected to the USB type-C circuit 200 . One or more mode judgment procedures may include an alternative (ALT) mode judgment procedure. If the result of the ALT mode judgment procedure is yes, the mode control unit 100 connects the first pin 10 and the second pin 20 to the USB type-C circuit 200 , and the USB type-C circuit 200 is configured as a general-purpose input and output (GPIO) mode 210, if the result of the ALT mode judgment program is no, the mode control unit connects the first pin 10 and the second pin 20 to the USB non-type-C C circuit 300.

Specifically, after the mode control unit 100 controls the connection of the USB type-C circuit 200 to the first pin 10 and the second pin 20 , it can further configure the USB type-C circuit 200 as a required functional circuit. In this embodiment, the mode control unit 100 can configure the USB type-C circuit 200 to the GPIO mode 210 through direct or indirect connection with the USB type-C circuit 200 . Here, the GPIO mode 210 can be further subdivided into a power delivery mode 211 and a type-C audio mode 212 . The switch between these two modes can also be controlled by a signal from the mode control unit 100 , or the USB type-C circuit 200 can judge by itself according to the signal from the switch unit 400 . In this embodiment, the conditions for determining the ALT mode may be the same as those stipulated in the USB PD 2.0 standard, so details will not be described in the description.

Preferably, after the result of the ALT mode judgment procedure is yes and the mode control unit 100 connects the first pin 10 and the second pin 20 to the USB type-C circuit 200, the mode control unit 100 can execute the GPIO mode judgment procedure, if If the result of the GPIO mode judgment program is yes, then the mode control unit configures the USB type-C circuit to the GPIO mode 210; if the result of the GPIO mode judgment program is no, the mode control unit configures the USB type-C circuit to the debug port mode 230.

In this embodiment, the function of the debug port mode 230 can be further integrated into the USB type-C circuit 200 . In this way, when the ALT mode determination procedure ends and the determination result is yes, the mode control unit 100 can further execute the GPIO mode determination procedure. If the input external signal is not within the predetermined range of the GPIO mode, the mode control unit 100 can configure the USB type-C circuit 200 in the debug port mode 230, so as to facilitate the development or development of the combined chip according to the embodiment of the present invention. detection, and further reduces the required circuit area.

Preferably, after the result of the GPIO mode judgment procedure is negative and before the mode control unit configures the USBtype-C circuit 200 to the debug port mode 230, the mode control unit 100 executes the debug mode judgment procedure, if the result of the debug mode judgment procedure is If yes, then the mode control unit configures the USB type-C circuit 200 as a debug port mode 230, if the result of the debug mode judgment program is no, then the mode control unit 100 configures the USB type-C circuit 200 as an RS232 interface mode 220 .

In this embodiment, the function of the RS232 interface mode 220 can be further integrated into the USBtype-C circuit 200 . In this way, if the result of the GPIO mode determination procedure is negative, the mode control unit 100 can further execute the debug mode determination procedure. If the input external signal is not within the predetermined range of the debug mode, the mode control unit 100 can configure the USB type-C circuit 200 in the RS232 interface mode 220 . Because under the specification of USB Type-C, it is allowed to convert from the USB Type-C interface to other interface adapters, so the function of the RS232 interface mode 220 can also be integrated into the USB type-C circuit 200, making this The combined chip of the embodiment of the invention can also correspond to the RS232 standard connector.

Preferably, after the result of the debugging mode judgment program is negative and before the mode control unit 100 configures the USB type-C circuit 200 to the RS232 interface mode 220, the mode control unit 100 can execute the RS232 mode judgment program, if the RS232 mode judgment program If the result is yes, the mode control unit 100 configures the USB type-C circuit as the RS232 interface mode 220, if the result of the RS232 mode determination procedure is negative, the mode control unit 100 resets and re-executes one or more mode determination procedures.

Since the external signal provided to the mode control unit 100 may not belong to any of the aforementioned normal operation modes, in this case, it may be that the connection of the front USB connector is wrong or the corresponding device is wrong. Therefore, the user can reconnect the USB connector in the connection checking or setting state, and the mode control unit 100 will also receive external signals again. Therefore, the mode control unit 100 can be set so that if it is unable to determine which working mode the combined chip will be in through an external signal, it will start from the beginning and carry out one or more mode determination procedures until it correctly determines whether the USB type-C circuit 200 or USB non- connection and operation modes of the type-C circuit 300.

Preferably, before the mode control unit 100 executes the ALT mode determination program, the mode control unit 100 may first execute the power delivery (PD) connection mode determination program, and if the result of the PD connection mode determination program is yes, the mode control unit 100 executes the ALT mode. Mode judging procedure, if the result of the PD connection mode judging procedure is negative, the mode control unit 100 executes the troubleshooting mode judging procedure.

In this embodiment, the mode control unit 100 may execute the PD connection mode judging procedure in advance to simplify the overall mode judging process. That is to say, if the mode control unit 100 judges that the combined chip will not provide the function of USB PD at the beginning, then the combined chip will definitely not provide the function of the USB non-type-C mode or the GPIO mode 210 . In this way, the mode control unit 100 can directly check whether the combined chip is used as the debug port mode 230 or the RS232 interface mode 220 without performing the ALT mode determination procedure and subsequent determination procedures.

Preferably, before the mode control unit 100 executes the PD connection mode determination program, the mode control unit 100 can first execute the type-C connection mode determination program, and if the type-C connection mode determination program is yes, the mode control unit 100 executes the PD connection mode determination program. A connection mode judging program, if the result of the type-C connection mode judging program is negative, the mode control unit executes the RS232 mode judging program.

As mentioned above, in order to further simplify the mode judging process, the mode control unit 100 may first execute the type-C connection mode judging procedure before executing the PD connection mode judging procedure. If the mode control unit 100 judges that the combined chip will not provide the USB type-C function at the beginning, then the combined chip will definitely not provide the function of the USB non-type-C mode, the GPIO mode 210 or the debug port mode 230 . In this way, the mode control unit 100 can directly check whether the combined chip is used as the RS232 interface mode 220 without performing the PD connection mode determination procedure and subsequent determination procedures.

Please refer to FIG. 3 , which is a schematic diagram of a third embodiment of the combined chip of the present invention. In the figure, the mode control unit 100 is connected to the USB type-C circuit 200 and the USB non-type-C circuit 300, and the first pin 10 and the second pin 20 are connected to the USB type-C circuit 200 or the USB non-type-C After the circuit 300 , the first pin 10 and the second pin 20 supply signals to the USB type-C circuit 200 or the USB non-type-C circuit 300 . After the first pin 10 and the second pin 20 stop supplying signals to the USB type-C circuit 200 or the USB non-type-C circuit 300 , the mode control unit 100 resets and re-executes one or more mode determination procedures.

When the combined chip operates normally in one working mode, one of the USB type-C circuit 200 and the USB non-type-C circuit 300 receives signals from the first pin 10 and the second pin 20 . At this time, the execution determination program flow of the mode control unit 100 may be temporarily stopped to save resources. When the first pin 10 and the second pin 20 stop providing signals to one of the USB type-C circuit 200 and the USB non-type-C circuit 300, it can be determined that the front-end USB connector has been pulled out, or combined A previous normally executing mode of operation of the chip has ceased. Therefore, one of the USB type-C circuit 200 and the USB non-type-C circuit 300 can wake up the mode control unit 100 through a direct or indirect connection with the mode control unit 100, so that the mode control unit 100 can reset and re-execute One or more mode judging programs judge which working mode the combined chip should be according to the next connection state of the front-end connector.

In addition, the combined chip of the embodiment of the present invention can also realize dynamic switching. For example, the reset of the judging program flow of the mode control unit 100 can be triggered by a signal sent by the software of the counterpart device, and there is no need to unplug the front-end USB connector. For example, when the device connected to the combined chip of the embodiment of the present invention is playing an audio-visual application program, the mode control unit 100 connects the USB type-C circuit 200 to the first pin 10 and the second pin 20 and It is configured in type-C audio mode 212 . Afterwards, if you want to switch to the charging function, you can operate through the connected software interface to send a signal to the mode control unit 100 , and the mode control unit 100 then configures the USB type-C circuit 200 to the power transmission mode 211 .

Please refer to FIG. 4 , which is a flow chart of the mode determination program for the combined chip of the present invention. The complete flow of the mode determination program applicable to the embodiment of the combined chip of the present invention will be described below with reference to FIG. 4 .

Firstly, in step S11, the combined chip is powered on and reset. At this time, it can be considered that the front connector is connected, and the mode control unit 100 starts a series of mode determination processes. In step S12, the mode control unit 100 executes the type-C connection determination process, if the determination result is yes, then perform step S13; if the determination result is no, then perform step S20. In step S13, the mode control unit 100 executes the PD connection judging process, if the judging result is yes, then go to step S14; if the judging result is no, go to step S18. In step S14, the mode control unit 100 executes the ALT mode judgment process, if the judgment result is yes, then execute step S16; if the judgment result is no, then execute step S15. In step S15, the mode control unit 100 judges that the combined chip should provide USB non-type-C functions, and connects the USB non-type-C circuit 300 to the first pin 10 and the second pin 20, and the USB type-C The circuit 200 is disconnected at the first pin 10 and the second pin 20 . In step S16, the mode control unit 100 executes the GPIO mode judgment process, if the judgment result is yes, then execute step S17; if the judgment result is no, then execute step S18. In step S17, the mode control unit 100 judges that the combined chip should provide the function of GPIO, and connects the USB type-C circuit 200 to the first pin 10 and the second pin 20, and the USB non-type-C circuit 300 is disconnected at The first pin 10 and the second pin 20 , at this moment, the USB type-C circuit 200 is configured in the GPIO mode 210 . In step S18, the mode control unit 100 executes the troubleshooting mode determination process, if the determination result is yes, then execute step S19; if the determination result is no, then execute step S20. In step S19, the mode control unit 100 judges that the combined chip should provide the function of a debug port, and connects the USB type-C circuit 200 to the first pin 10 and the second pin 20, and the USB non-type-C circuit 300 The circuit is disconnected at the first pin 10 and the second pin 20 , and the USB type-C circuit 200 is configured in the debug port mode 230 at this time. In step S20, the mode control unit 100 executes the RS232 mode judging program, if the judging result is yes, then go to step S21; if the judging result is no, go back to step S11 and restart the judging process. In step S21, the mode control unit 100 judges that the combined chip should provide the function of the RS232 interface, and connects the USB type-C circuit 200 to the first pin 10 and the second pin 20, and the USB non-type-C circuit 300 is disconnected. At the first pin 10 and the second pin 20 , the USB type-C circuit 200 is configured as an RS232 interface mode 220 at this time. In the case that the combined chip is configured in the USB non-type-C or GPIO mode 210, if the type-C signal is suspended, step S11 is performed, that is, the mode control unit 100 resets and restarts the mode determination process.

The above descriptions are illustrative only, not restrictive. Any equivalent modifications or changes made without departing from the spirit and scope of the present invention shall be included in the appended claims.

Claims (8)

1. a combination type chip, it is applicable to a USB connector, it is characterised in that comprise:

One universal serial bus c-type, i.e. USB type-C circuit；

One universal serial bus non-c-type circuit, i.e. USB non-type-C circuit；

One switching switch element, it is connected to this USB type-C circuit and the non-type-C of this USB Circuit；

One mode controlling unit, it is connected to a control end of this switching switch element, and is performing Controlling this switching switch element after one or more mode decision program makes this USB type-C circuit even Being connected to one first pin and one second pin, this USB non-type-C circuit breaker first connects in this Foot and this second pin, or make this USB non-type-C circuit be connected to this first pin with This second pin, this USB type-C circuit breaker is in this first pin and this second pin.

2. combination type chip as claimed in claim 1, wherein this mode controlling unit is connected to this USB type-C circuit, this one or more mode decision program comprises an ALT mode decision program, If this ALT mode decision procedure result is yes, then this mode controlling unit connect this first pin with Second pin is in this USB type-C circuit, and this USB type-C circuit is configured to GPIO Pattern, if this ALT mode decision procedure result is no, then this mode controlling unit connect this first Pin and the second pin are in this USB non-type-C circuit.

3. combination type chip as claimed in claim 2, wherein in this ALT mode decision program Result is for being and this mode controlling unit connects this first pin and this second pin in this USB After type-C circuit, this mode controlling unit performs a GPIO mode decision program, if this GPIO Mode decision procedure result is yes, then this USB type-C circuit is configured to by this mode controlling unit GPIO pattern, if this GPIO mode decision procedure result is no, this mode controlling unit should USB type-C circuit is configured to misarrangement port mode.

4. combination type chip as claimed in claim 3, wherein in this GPIO mode decision program Result is no rear and this USB type-C circuit is configured to misarrangement port mould by this mode controlling unit Before formula, this mode controlling unit performs a misarrangement mode decision program, if this misarrangement mode decision journey Sequence result is yes, then this USB type-C circuit is configured to misarrangement port mould by this mode controlling unit Formula, if this misarrangement mode decision procedure result is no, then this mode controlling unit is by this USB Type-C circuit is configured to RS232 interface modes.

5. combination type chip as claimed in claim 4, wherein ties in this misarrangement mode decision program This USB type-C circuit is configured to RS232 interface mould for no rear and this mode controlling unit by fruit Before formula, this mode controlling unit performs a RS232 mode decision program, if this RS232 pattern Determining program result is yes, then this USB type-C circuit is configured to by this mode controlling unit RS232 interface modes, if this RS232 mode decision procedure result is no, then this Schema control list Unit resets and re-executes this one or more mode decision program.

6. combination type chip as claimed in claim 5, wherein performing at this mode controlling unit should Before ALT mode decision program, this mode controlling unit first carries out a PD connection mode determining program, If this PD connection mode determining program result is yes, then this mode controlling unit performs this ALT mould Formula determining program, if this PD connection mode determining program result is no, then this mode controlling unit Perform this misarrangement mode decision program.

7. combination type chip as claimed in claim 6, wherein performing at this mode controlling unit should Before PD connection mode determining program, this mode controlling unit first carries out a type-C connection mode and sentences Disconnected program, if this type-C connection mode determining program result is yes, then this mode controlling unit is held This PD connection mode determining program of row, if this type-C connection mode determining program result is no, Then this mode controlling unit performs this RS232 mode decision program.

8. combination type chip as claimed in claim 1, wherein this mode controlling unit is connected to this USB type-C circuit and this USB non-type-C circuit, at this first pin and this second pin After being connected to this USB type-C circuit or this USB non-type-C circuit, this first pin with should Second pin supply signal gives this USB type-C circuit or this USB non-type-C circuit, and

Wherein stop supply signal to this USB type-C electricity at this first pin and this second pin Behind road or this USB non-type-C circuit, this mode controlling unit reset and re-execute this one or Various modes determining program.