TWI862148B - Multi-channel vehicle system - Google Patents

Abstract

A multi-channel vehicle-mounted system is used to wake up multiple peripheral devices of the vehicle. The vehicle-mounted system includes a processor and a single-channel multiplexer. The single-channel multiplexer further includes a truth table. The truth table has several truth combinations. A set of processor signals will correspond to a truth combination to generate a wake-up instruction. When the processor receives an operation signal, the corresponding group of processor signals will be sent to the single-channel multiplexer, and the corresponding wake-up command will be generated by the corresponding combination of true values, which can wake up the corresponding peripheral device among the multiple peripheral devices of the vehicle.

Description

Multi-channel vehicle system

The present invention relates to a multi-channel vehicle-mounted system, and more particularly to a multi-channel vehicle-mounted system that can be used to wake up multiple peripheral devices of a vehicle.

In current vehicle systems, multiple peripheral devices are connected. Therefore, when the vehicle peripheral devices need to be operated, multiple different operation signals that can wake up multiple peripheral devices are required to wake up these vehicle peripheral devices separately. In response to this demand, it is necessary to develop a technology that can automatically generate wake-up commands to wake up the vehicle peripheral devices in response to different operation signals. However, in the common automatic wake-up technology, the processor (MCU) used cannot provide enough output pins to respond to so many operation signals and wake-up commands at the same time. Therefore, it is necessary to use additional multiplexing chips to increase the number of output pins that can cope with multiple wake-up commands. The multiplexing chip can also be called a multiplexer (MUX) or a data multiplexer (Data Selector).

At present, it is generally used in vehicle-mounted systems. The multiplexing chip used is, for example, the TIC10024 multiplexing chip developed by Texas Instruments (TI). When multiple TIC10024 multiplexing chips need to be awakened, multiplexing chip detection is required and interrupts are generated to support the wake-up operation of a certain input wake-up instruction. In polling mode, the TIC10024 multiplexing chip samples the input signal in a loop sequence and uses a POLL_TIME register to control the loop frequency. If a change in the switch state of the peripheral device is detected, the INT pin of the TIC10024 multiplexing chip will be set to a low level, sending an interrupt wake-up, and then the processor uses the Serial Peripheral Interface Bus (SPIB); SPI) to read the status information of the peripheral device switches.

Although this TIC10024 multiplexing chip has the ability to wake up more peripheral devices at the same time, the TIC10024 chip is not only expensive, but also must be installed at the center of the circuit board. For the multiple external peripheral device connectors with multiple output directions on the circuit board, the assembly method of setting the multiplexing chip at the center point cannot be flexibly used, and will instead cause some pins to be redundant. In addition, considering the size of the TIC10024 multiplexing chip and the aforementioned price issue, it will not have a competitive advantage in practical commercialization.

Therefore, in order to solve the above shortcomings and improve the cost and other problems, it is necessary to develop an ideal technical method to provide a more efficient multi-channel control technology mode to solve the above problems.

The main purpose of the present invention is to provide an optimized design for automatic signal awakening, and more particularly, to provide a multi-channel vehicle-mounted system for awakening multiple peripheral devices of a vehicle.

The present invention is to solve the problems of the prior art. The necessary technical means adopted is to provide a multi-channel vehicle-mounted system for waking up multiple peripheral devices of a vehicle. It can generate the channels required to wake up more vehicle peripheral devices in a decentralized manner at a relatively low cost, thereby solving the problem of insufficient channels required for the previous wake-up command.

The present invention relates to a multi-channel vehicle-mounted system for waking up multiple peripheral devices of a vehicle. The vehicle-mounted system includes at least one processor (Micro Control Unit; MCU), at least one single-channel multiplexer, and a plurality of connectors.

The processor is used to receive a variety of operation signals from the outside. These multiple operation signals come from the operation of the vehicle users, and the purpose is to wake up different vehicle peripheral devices respectively. After the processor receives one of the multiple operation signals, it can generate a set of processor signals accordingly.

The single-channel multiplexer can be connected to the processor in an electrically coupled manner, wherein the single-channel multiplexer can be a CMOS integrated circuit. Specifically, the single-channel multiplexer can be a TMUX1308 chip.

To continue the description, the single-channel multiplexer further includes a truth table, wherein the truth table has a plurality of truth value combinations, and each of the plurality of truth value combinations corresponds to each of the plurality of external peripheral devices and generates a wake-up command respectively.

To explain further, in the plurality of sets of truth value combinations, each set of truth value combinations will also correspond to a set of processor signals from the plurality of sets of processor signals from the processor.

Therefore, when the processor receives an operation signal, a corresponding set of processor signals will be transmitted to the single-channel multiplexer, and a corresponding wake-up command will be generated through a corresponding combination of true values to wake up the corresponding peripheral devices among the multiple peripheral devices of the vehicle.

To further explain, the single-channel multiplexer in the multi-channel vehicle-mounted system of the present invention includes a plurality of pins. For example, the TMUX1308 chip has 16 pins, of which 3 are input pins, 8 are output pins, and 1 is an enable pin.

Next, the eight output pins can correspond to eight sets of true value combinations respectively, and eight wake-up commands can be transmitted through the eight output pins to wake up eight corresponding vehicle peripheral devices.

To further explain, a single-channel multiplexer such as the TMUX1308 chip also includes an enable pin, which is used to receive an enable signal. When the peripheral device of the vehicle needs to be awakened, the corresponding true value combination must also correspond to the enable pin being in a disabled state (disable) without an enable signal before the awakening can continue.

To further illustrate, the truth value combination of the truth table can be composed of A0, A1, and A2, which are marked as 0 or 1. To further illustrate, A0, A1, and A2 in the truth table correspond to multiplexer address 0, multiplexer address 1, and multiplexer address 2 of the processor, respectively.

To continue, the single-channel multiplexer will receive three processor signals from the processor. The sources of these three processor signals are multiplexer address 0, multiplexer address 1, and multiplexer address 2 of the processor. These three processor signals are respectively input through the three input pins of the single-channel multiplexer to input the true values of A0, A1, and A2 to the single-channel multiplexer.

To further explain, a single-channel multiplexer polls all the multiple sets of processor signals from the processor to obtain corresponding true value combinations.

It is additionally explained that the number of peripheral devices in the multi-channel vehicle-mounted system of the present invention is greater than the number of pins of the processor, and the number of peripheral devices is less than or equal to the sum of the number of multiple sets of true value combinations of all single-channel multiplexers. That is, because the number of peripheral devices exceeds the number of pins of the processor, the output pins of the single-channel multiplexer are used to expand a sufficient number of pins to respond to and meet the wake-up requirements of multiple peripheral devices.

In addition, the vehicle-mounted system further includes a plurality of plug-ins and a plurality of single-channel multiplexers. The plurality of plug-ins are electrically coupled to the plurality of single-channel multiplexers respectively, and the plurality of plug-ins are externally coupled to the plurality of peripheral devices respectively.

Therefore, the present invention provides a multi-channel vehicle-mounted system for waking up multiple peripheral devices of a vehicle. Through a processor and a single-channel multiplexer such as a TMUX1308 chip, and by utilizing a truth table and a truth value combination in the single-channel multiplexer, the space utilization of circuit components on a circuit board can be optimized, and channels required for waking up more vehicle peripheral devices can be generated in a decentralized manner, thereby solving the problem of insufficient channels required for the previous wake-up command, and at the same time reducing the cost of chip use.

The specific embodiments of the present invention will be further described by the following embodiments and drawings.

The main purpose of the present invention is to provide a multi-channel vehicle-mounted system for waking up multiple peripheral devices of the vehicle.

Please refer to the first figure, which is a functional association diagram of the multi-channel vehicle-mounted system 1 of the present invention. As shown in the figure, the present invention provides a multi-channel vehicle-mounted system 1 for waking up multiple peripheral devices of a vehicle. The vehicle-mounted system 1 can be made into a circuit board, and the vehicle-mounted system includes a processor 10, a single-channel multiplexer 20, and a plug-in 30. Among them, the single-channel multiplexer 20 further includes a truth table 202 and a plurality of pins 22. The truth table 202 has a plurality of sets of truth value combinations. The pins 22 include an output pin 2202, an output pin 2204, an enable pin 2206, etc.

The processor 10 is electrically coupled to the single-channel multiplexer 20, and more output channels are expanded through the pins 22 of the single-channel multiplexer 20. The plug-in 30 is also electrically coupled to the single-channel multiplexer 20, and the plug-in 30 is electrically coupled to other peripheral devices of the vehicle outside the vehicle system 1.

After receiving one of the multiple external operation signals, the processor 10 can generate a set of processor signals accordingly and transmit the signal to the single-channel multiplexer 20.

A set of processor signals will correspond to a set of truth value combinations in the plurality of truth value combinations in the single-channel multiplexer 20. In the single-channel multiplexer 20, each of the plurality of truth value combinations will respectively correspond to a wake-up command, wherein when the processor 10 receives an operation signal input from an external operator, a set of processor signals generated by the operation signal will be transmitted to the single-channel multiplexer 20, and then a corresponding wake-up command will be generated by the corresponding truth value combination, and then the corresponding peripheral device among the plurality of peripheral devices of the vehicle will be woken up through the plug-in 30.

As in the aforementioned vehicle-mounted system 1, the single-channel multiplexer 20 may be a CMOS integrated circuit, and further, the single-channel multiplexer 20 of the CMOS integrated circuit may be a TMUX1308 chip.

Taking the single-channel multiplexer 20 of the TMUX1308 chip as an example, it has 16 pins 22, of which 8 are output pins 2202, 3 are input pins 2204, and 1 is an enable pin 2206. Other empty pins, ground pins, and input pins 2204 indirectly related to the output pins 2202 are not described in detail for the time being.

To continue, the processor signal status of the input pin 2204 and the enable pin 2206 can correspond to a true value combination through the truth table 202. The eight output pins 2202 can correspond to eight sets of true value combinations respectively, and eight wake-up instructions can be transmitted through the eight output pins 2202. These eight wake-up instructions can wake up multiple corresponding vehicle peripheral devices, thereby making up for the problem of insufficient output channels of the processor 10 pins.

Please refer to the second figure, which is a schematic diagram of the application of multiple single-channel multiplexers 20 of the present invention. According to the architecture of the first figure, in practice, a processor can be equipped with multiple single-channel multiplexers 20. Taking the TMUX1308 chip as an example, each additional single-channel multiplexer 20 will expand eight output channels, and through one or more plug-ins 30, it can meet the needs of waking up more peripheral devices of the vehicle for operation.

Please refer to the third figure, which is a schematic diagram of the truth table 202 in the single-channel multiplexer of the present invention. It can be seen from the truth table 202 included in the single-channel multiplexer 20 of the present invention that the truth value combination of the truth table 202 can be composed of A0, A1, and A2, which are marked with a truth value of 0 or 1 to form a truth value combination. In the single-channel multiplexer 20 of the same TMUX1308 chip, the truth table 202 can generate 8 sets of truth value combinations. Furthermore, the enable pin 2206 can also be expanded as part of a truth value combination. For example, the signal truth values of the enable pin 2206 in the table are all 0, which means that before waking up, the condition must be that the enable pin 2206 truth value is 0, indicating that the previous peripheral device is in a state that has not been awakened, so that the corresponding peripheral device can be awakened according to the truth value combination.

To further illustrate, in the truth table 202 of the single-channel multiplexer 20 mentioned above, A0, A1, and A2 in the truth table correspond to the output pins of the three processors 10, namely, the multiplexer address 0, the multiplexer address 1, and the multiplexer address 2 of the processor 10, respectively, so that the processor 10 can control the output of the single-channel multiplexer 20.

Please refer to the fourth figure, which is a circuit diagram of the pin 22 of the single-channel multiplexer 20 of the present invention. In the vehicle-mounted system 1 of the present invention, the single-channel multiplexer 20 receives three processor signals from the processor 10. The three processor signals are from the three output pins of the processor 10, namely, multiplexer address 0, multiplexer address 1, and multiplexer address 2. The three processor signals are respectively input to the single-channel multiplexer 20 through the three input pins 2204 of the single-channel multiplexer 20 to input the true values of A0, A1, and A2.

Next, the single-channel multiplexer 20 uses the truth value combination of the truth table 202 to decode the processor signal, which also includes confirming the truth value of the enable pin 2206 receiving the processor signal, so that it can respond to the wake-up instruction and make correct outputs to the eight input pins 2204 of the single-channel multiplexer 20 to wake up the peripheral devices that should be woken up through the plug-in 30.

It should be noted that, in practice, the single-channel multiplexer 20 can obtain corresponding true value combinations by polling all the multiple sets of processor signals from the processor 10.

Therefore, in the present invention, the number of the plurality of peripheral devices is greater than the number of the pins 22 of the processor 10, while the number of the plurality of peripheral devices is less than or equal to the sum of the number of the plurality of sets of true value combinations in all the single-channel multiplexers 20. That is, because the number of peripheral devices exceeds the number of the pins of the processor 10, the output pins 2202 of the single-channel multiplexer 20 are used to expand a sufficient number of pins 22 to respond to and meet the wake-up requirements of the plurality of peripheral devices.

To further explain, the enable pin is used to receive an enable signal. When the peripheral device of the vehicle needs to be awakened, the corresponding true value combination must also correspond to the enable pin being in a disabled state without an enable signal, so that the awakening can be continued.

The size of the TMUX1308 chip that can be used in the present invention is 4.2x2 mm, while the package size of the previous TIC10024 chip is 9.7x6.4 mm. Although the TIC10024 chip has 24 output channels and the TMUX1308 chip has 8 output channels, the size of three TMUX1308 chips is still smaller than one TIC10024 chip, so the space optimization of the circuit board will be better.

To continue, the TMUX1308 chip can be classified more finely, and each plug-in 30 connected to the plug-in can use a separate one. Compared with the TIC10024 chip, the TIC10024 chip needs to be distributed at the center of the circuit board, and cannot be flexibly used for multi-directional peripheral devices. Instead, it will cause too many pins to be idle. In addition, the TIC10024 chip has a higher integration, so this TMUX1308 chip will also have a greater advantage in price.

Therefore, the present invention has the following advantages: 1. The size of the single-channel multiplexer 20 of the present invention is small enough, so the space optimization of the circuit board is better. 2. The single-channel multiplexer 20 of the present invention can be more subdivided, and each plug-in 30 can use a separate single-channel multiplexer 20. 3. The cost of software development is relatively low, and only A0, A1 and A2 need to be used to periodically cycle the truth table 202 of the single-channel multiplexer 20 to check whether the input pin 2204 has changed. 4. The cost of the single-channel multiplexer 20 of the present invention has obvious advantages.

Therefore, the present invention provides a vehicle-mounted system 1 for waking up multiple peripheral devices of a vehicle. The system utilizes a processor 10, a single-channel multiplexer 20 such as a TMUX1308 chip, and a plug-in 30, and then cooperates with the truth value combination of a truth table 202 to control and wake up multiple peripheral devices of the vehicle. The optimized wake-up design of the vehicle peripheral device can achieve the advantages of optimizing the existing space and effectively reducing costs, so as to improve the problems of the prior art.

The above detailed description of the preferred specific embodiments is intended to more clearly describe the features and spirit of the present invention, but is not intended to limit the scope of the present invention by the preferred specific embodiments disclosed above. On the contrary, the purpose is to cover various changes and arrangements with equivalents within the scope of the patent application for the present invention.

1: Vehicle system

10: Processor

20: Single channel multiplexer

22: Tube feet

30: Plugins

202:Truth Table

2202: Output pin

2204: Input pin

2206: Enable pin

The first figure is a functional association diagram of a multi-channel vehicle-mounted system of the present invention; The second figure is a schematic diagram of the application of multiple single-channel multiplexers of the present invention; The third figure is a schematic diagram of the truth table in the single-channel multiplexer of the present invention; and The fourth figure is a schematic diagram of the pin circuit of the single-channel multiplexer of the present invention.

1: Vehicle system

10: Processor

20: Single channel multiplexer

22: Tube feet

30: Plug-ins

202:Truth table

2202: Output pin

2204: Input pin

2206: Enable the pin

Claims (9)

A multi-channel vehicle system is used to wake up multiple peripheral devices of a vehicle. The vehicle system includes: a processor (Micro Control Unit; MCU), which generates a set of processor signals in response to receiving one of multiple external operation signals; and at least one single-channel multiplexer, which is electrically coupled to the processor. The single-channel multiplexer has a truth table and an enable pin. The truth table has a plurality of sets of truth value combinations. The plurality of truth value combinations respectively generate a wake-up instruction. One of the plurality of truth value combinations corresponds to a set of processor signals. The enable pin is used to receive an enable signal (enable pin). signal), when the peripheral device of the vehicle is to be awakened, the corresponding true value combination must correspond to a disabled state (disable) without the enable signal; wherein, when the processor receives an operation signal, the corresponding set of processor signals will be transmitted to the single-channel multiplexer, and the single-channel multiplexer decodes a set of processor signals through the corresponding set of true value combinations to generate a corresponding wake-up instruction, and also includes confirming the true value of the enable pin receiving a set of processor signals, so as to wake up the corresponding peripheral device among the multiple peripheral devices of the vehicle. The vehicle-mounted system as described in item 1 of the patent application, wherein the single-channel multiplexer is a CMOS integrated circuit. The vehicle-mounted system as described in item 2 of the patent application, wherein the single-channel multiplexer is a TMUX1308 chip. As described in item 3 of the patent application scope, the single-channel multiplexer has 8 output pins, which correspond to 8 sets of true value combinations respectively. The 8 output pins can transmit 8 wake-up instructions to wake up 8 peripheral devices. As described in item 3 of the patent application scope, the truth value combination of the truth table is composed of A0, A1, and A2 marked as 0 or 1, and A0, A1, and A2 correspond to the multiplexer address 0, multiplexer address 1, and multiplexer address 2 of the processor respectively. As described in item 5 of the patent application scope, the three processor signals from the multiplexer address 0, the multiplexer address 1, and the multiplexer address 2 are respectively input to the single-channel multiplexer through the three input pins of the single-channel multiplexer. As described in item 1 of the patent application scope, the single-channel multiplexer polls all the multiple sets of processor signals from the processor to obtain the corresponding true value combination. As described in item 1 of the patent application scope, the number of the plurality of peripheral devices is greater than the number of pins of the processor, and the number of the plurality of peripheral devices is less than or equal to the sum of the number of multiple sets of true value combinations of all single-channel multiplexers. As described in item 1 of the scope of the patent application, the vehicle-mounted system further includes a plurality of connectors and a plurality of single-channel multiplexers, wherein the plurality of connectors are electrically coupled to the plurality of single-channel multiplexers, and the connector is externally coupled to the peripheral device.