Digital signal transmitting and receiving device

Abstract

A digital signal transmitting and receiving device is applied to a wiring board. The digital signal transmitting and receiving device comprises a microcontroller, a multi-channel input / output expander and at least one digital input / digital output mode selection circuit, the multi-channel input / output expander is electrically connected to the microcontroller; the at least one digital input / digital output mode selection circuit is electrically connected to the microcontroller, the multi-channel input / output expander and the wiring board. The microcontroller notifies the multi-channel input / output expander of a digital input / digital output mode of the at least one digital input / digital output mode selection circuit. And the microcontroller controls the at least one digital input digital output mode selection circuit as a digital input circuit or a digital output circuit according to the digital input digital output mode.

Description

Technical Field

[0001] This disclosure relates to a signal transceiver, and more particularly to a digital signal transceiver. Background Technology

[0002] A related technology digital signal transceiver is connected to a junction box to receive or transmit multiple digital signals via multiple digital pins, which can be classified as digital input pins or digital output pins. If the digital pin is a digital input pin, the related technology digital signal transceiver receives digital signals transmitted by the junction box through the digital input pin; if the digital pin is a digital output pin, the related technology digital signal transceiver transmits digital signals to the junction box through the digital output pin.

[0003] In the related art digital transceiver, each of the digital pins is fixed and cannot be changed as a digital input pin or a digital output pin. However, in the communication between the related art digital transceiver and the junction box, sometimes the related art digital transceiver needs to receive a large number of digital signals transmitted by the junction box (thus requiring more digital input pins), and sometimes the related art digital transceiver needs to transmit a large number of digital signals to the junction box (thus requiring more digital output pins). Therefore, fixing each of the digital pins of the related art digital transceiver as a digital input pin or a digital output pin and not being able to freely adjust them is not flexible enough. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this disclosure is to provide a digital signal transceiver.

[0005] To achieve the aforementioned objectives of this disclosure, the digital signal transceiver of this disclosure is applied to a junction box, the digital signal transceiver comprising: a microcontroller; a multi-channel input / output amplifier electrically connected to the microcontroller; and at least one digital input / output mode selection circuit electrically connected to the microcontroller, the multi-channel input / output amplifier, and the junction box, wherein the microcontroller is configured to notify the multi-channel input / output amplifier of a digital input / output mode of the at least one digital input / output mode selection circuit, and the microcontroller is configured to control the at least one digital input / output mode selection circuit as a digital input circuit or a digital output circuit according to the digital input / output mode.

[0006] Furthermore, in a specific embodiment of the digital signal transceiver apparatus of the present disclosure as described above, the at least one digital input / output mode selection circuit includes: a general-purpose input / output multiplexer electrically connected to the multichannel input / output expander.

[0007] Furthermore, in a specific embodiment of the digital signal transceiver apparatus of the present disclosure as described above, the at least one digital input / output mode selection circuit further includes: an input power MOSFET electrically connected to the general-purpose input / output multiplexer.

[0008] Furthermore, in a specific embodiment of the digital signal transceiver device of the present disclosure as described above, the at least one digital input / digital output mode selection circuit further includes: a current limiter electrically connected to the input power metal-oxide-semiconductor field-effect transistor and the terminal block.

[0009] Furthermore, in a specific embodiment of the digital signal transceiver device of the present disclosure as described above, the at least one digital input / output mode selection circuit further includes: an output power MOSFET electrically connected to the general-purpose input / output multiplexer, the current limiter, and the terminal block.

[0010] Furthermore, in a specific embodiment of the digital signal transceiver device of the present disclosure as described above, the digital signal transceiver device further includes: a signal isolator electrically connected to the microcontroller and the general-purpose input / output multiplexer.

[0011] Furthermore, in a specific embodiment of the digital signal transceiver apparatus of the present disclosure as described above, the digital signal transceiver apparatus further includes: a control bus isolator electrically connected to the microcontroller and the multi-channel input / output expander, wherein the microcontroller is configured to notify the multi-channel input / output expander of the digital input / output mode of the at least one digital input / output mode selection circuit via the control bus isolator.

[0012] Furthermore, in a specific embodiment of the digital signal transceiver device of this disclosure as described above, the multi-channel input / output expander is electrically connected to a digital input interrupt pin of the microcontroller; the control bus isolator is electrically connected to a control bus pin of the microcontroller; and the signal isolator is electrically connected to a mode selection signal pin of the microcontroller.

[0013] Furthermore, in a specific embodiment of the digital signal transceiver device of this disclosure as described above, the microcontroller is configured to transmit a control signal, which is a high signal, to the general-purpose input / output multiplexer via the signal isolator so that the at least one digital input / output mode selection circuit acts as the digital output circuit.

[0014] Furthermore, in a specific embodiment of the digital signal transceiver device of this disclosure as described above, the microcontroller is configured to transmit a control signal, which is a low signal, to the general-purpose input / output multiplexer via the signal isolator so that the at least one digital input / output mode selection circuit acts as the digital input circuit.

[0015] The advantage of this disclosure is that it allows for the free determination of whether a digital pin is a digital input pin or a digital output pin.

[0016] To further understand the techniques, methods, and effects of this disclosure and to achieve the intended purposes of this disclosure, please refer to the following detailed description and accompanying drawings; furthermore, the purposes, features, and characteristics of this disclosure can be understood in greater depth and specificity; however, the accompanying drawings are provided for reference and description only and are not intended to limit the scope of this disclosure. Attached Figure Description

[0017] Figure 1 This is a block diagram of a first embodiment of the digital signal transceiver apparatus of this disclosure.

[0018] Figure 2 This is a block diagram of a second embodiment of the digital signal transceiver apparatus of this disclosure. Detailed Implementation

[0019] Numerous specific details are provided in this disclosure to provide a thorough understanding of embodiments thereof; however, those skilled in the art will appreciate that this disclosure may be practiced without one or more of these specific details; in other instances, well-known details have not been shown or described to avoid obscuring the features of this disclosure. The technical content and detailed description of this disclosure are as follows, and are illustrated with accompanying drawings.

[0020] Please refer to Figure 1This is a block diagram of a first embodiment of the digital signal transceiver device 10 of this disclosure. The digital signal transceiver device 10 is applied to a terminal block 20. The digital signal transceiver device 10 includes a microcontroller (also referred to as an MCU) 102, a multi-channel input / output expander 104, and at least one digital input / output mode selection circuit 106 (e.g., multiple digital input / output mode selection circuits 106). The multi-channel input / output expander 104 is electrically connected to the microcontroller 102; the at least one digital input / output mode selection circuit 106 is electrically connected to the microcontroller 102, the multi-channel input / output expander 104, and the terminal block 20. The digital input / output mode selection circuit 106 can also be referred to as a digital pin.

[0021] The microcontroller 102 is configured to notify the multichannel input / output expander 104 of a digital input / output mode selection circuit 106 of a digital input / output mode, and the microcontroller 102 is configured to control the digital input / output mode selection circuit 106 as a digital input circuit (i.e., a digital input pin) or a digital output circuit (i.e., a digital output pin) according to the digital input / output mode.

[0022] Furthermore, when the at least one digital input / digital output mode selection circuit 106 is used as the digital input circuit (i.e., digital input pin), the terminal block 20 transmits digital input signals (not shown) through the at least one digital input / digital output mode selection circuit 106 and the multi-channel input / output expander 104. Figure 1 The at least one digital input / output mode selection circuit 106 is used as the digital output circuit (i.e., digital output pin) to the microcontroller 102. When the at least one digital input / output mode selection circuit 106 is used as the digital output circuit (i.e., digital output pin), the microcontroller 102 transmits digital output signals (not shown) through the multi-channel input / output expander 104 and the at least one digital input / output mode selection circuit 106. Figure 1 ) to the terminal block 20.

[0023] Based on signal transmission requirements and through software function settings, the microcontroller 102 can freely determine whether each of the digital input / digital output mode selection circuits 106 should be used as a digital input circuit (i.e., a digital input pin) or a digital output circuit (i.e., a digital output pin). For example, assuming the digital signal transceiver 10 has eight digital input / digital output mode selection circuits 106 (i.e., eight digital pins), the microcontroller 102 can determine that four digital input / digital output mode selection circuits 106 (i.e., four digital pins) should be used as digital input pins and four digital input / digital output mode selection circuits 106 (i.e., four digital pins) should be used as digital output pins; or, the microcontroller 102 can determine that six digital pins should be used as digital input pins and two digital pins should be used as digital output pins.

[0024] Please refer to Figure 2 This is a block diagram of a second embodiment of the digital signal transceiver 10 disclosed herein; Figure 2 The components shown are Figure 1 For the sake of simplicity, the components shown are identical and will not be described again here. The digital signal transceiver 10 also includes a signal isolator 116 and a control bus isolator 118; each of the digital input / output mode selection circuits 106 includes a general purpose input / output (GPIO) multiplexer 108, an input power MOSFET 110, a current limiter 112, and an output power MOSFET 114.

[0025] The signal isolator 116 is electrically connected to the microcontroller 102 and the general-purpose input / output multiplexer 108. The control bus isolator 118 is electrically connected to the microcontroller 102 and the multi-channel input / output expander 104. The general-purpose input / output multiplexer 108 is further electrically connected to the multi-channel input / output expander 104. The input power MOSFET 110 is electrically connected to the general-purpose input / output multiplexer 108. The current limiter 112 is electrically connected to the input power MOSFET 110 and the terminal block 20. The output power MOSFET 114 is electrically connected to the general-purpose input / output multiplexer 108, the current limiter 112, and the terminal block 20. The multi-channel input / output expander 104 is also electrically connected to a digital input interrupt pin 120 of the microcontroller 102, the control bus isolator 118 is electrically connected to a control bus pin 122 of the microcontroller 102, and the signal isolator 116 is electrically connected to a mode selection signal pin 124 of the microcontroller 102.

[0026] The microcontroller 102 is configured to notify the multi-channel input / output expander 104 of the digital input / output mode selection circuits 106 of their digital input / output mode selection modes via the control bus isolator 118. The microcontroller 102 is configured to transmit a control signal 126 as a high signal to the general-purpose input / output multiplexer 108 via the signal isolator 116 to cause at least one digital input / output mode selection circuit 106 to function as the digital output circuit. The microcontroller 102 is also configured to transmit a control signal 126 as a low signal to the general-purpose input / output multiplexer 108 via the signal isolator 116 to cause at least one digital input / output mode selection circuit 106 to function as the digital input circuit.

[0027] Furthermore, after the general-purpose input / output multiplexer 108 receives the control signal 126 as a high signal, the general-purpose input / output multiplexer 108 is configured to turn on the output power MOSFET 114, such that the microcontroller 102 is configured to transmit digital output signals (not shown) through the control bus isolator 118, the multichannel input / output expander 104, the general-purpose input / output multiplexer 108, and the output power MOSFET 114. Figure 2 The terminal block 20 transmits digital input signals (not shown) to the terminal block 20. After the general-purpose input / output multiplexer 108 receives the control signal 126 as a low signal, the general-purpose input / output multiplexer 108 is configured to disconnect the output power MOSFET 114, and the terminal block 20 transmits digital input signals (not shown) through the current limiter 112, the input power MOSFET 110, the general-purpose input / output multiplexer 108, the multichannel input / output expander 104, and the control bus isolator 118. Figure 2 The digital input signal is transmitted to the microcontroller 102; when the digital input signal is transmitted to the multichannel input / output expander 104, the multichannel input / output expander 104 is also configured to notify the microcontroller 102 via the digital input interrupt pin 120 that the digital input signal has been transmitted to the multichannel input / output expander 104.

[0028] The advantage of this disclosure is that digital pins can be freely determined as digital input pins or digital output pins. This disclosure also meets the IEC 61131-2 standard. This disclosure changes the signal isolation method to achieve circuit isolation with a minimum number of signals. This disclosure uses the multi-channel input / output expander 104 with a digital signal control interface (not shown in these figures) to enable the general-purpose input / output multiplexer 108 of the digital input / output mode selection circuits 106 to be set as input or output. The isolation side of this disclosure is designed at the control signal end, which saves on the number of signal isolations. The functions of the digital input / output mode selection circuits 106 of this disclosure (whether to act as input or output) are independent and do not affect each other.

[0029] Although this disclosure has been described with reference to embodiments thereof, it should be understood that this disclosure is not limited to its details; various alternatives and modifications have been proposed in the foregoing description, and other alternatives and modifications will occur to those skilled in the art; therefore, all such alternatives and modifications are intended to be included within the scope of this disclosure.

[0030] [Symbol Explanation]

[0031] 10: Digital signal transceiver

[0032] 20: Terminal Block

[0033] 102: Microcontroller

[0034] 104: Multi-channel input / output expander

[0035] 106: Digital Input / Digital Output Mode Selection Circuit

[0036] 108: General Purpose Input / Output Multiplexer

[0037] 110: Input power MOSFET

[0038] 112: Current limiter

[0039] 114: Output power metal-oxide-semiconductor field-effect transistor

[0040] 116: Signal Isolator

[0041] 118: Control Bus Isolator

[0042] 120: Digital Input Interrupt Pin

[0043] 122: Control bus pin

[0044] 124: Mode selection signal pin

[0045] 126: Control Signal

Claims

1. A digital signal transceiver, applied to a terminal block, the digital signal transceiver comprising: A microcontroller; A multi-channel input / output expander, the multi-channel input / output expander being electrically connected to the microcontroller; and At least one digital input / digital output mode selection circuit, the at least one digital input / digital output mode selection circuit being electrically connected to the microcontroller, the multi-channel input / output expander, and the junction box. in, The microcontroller is configured to notify the multichannel input / output expander of a digital input / output mode selection circuit of a digital input / output mode, and the microcontroller is configured to control the at least one digital input / output mode selection circuit as a digital input circuit or a digital output circuit according to the digital input / output mode.

2. The digital signal transceiver according to claim 1, wherein, The at least one digital input / digital output mode selection circuit includes: A general-purpose input / output multiplexer is electrically connected to the multichannel input / output expander.

3. The digital signal transceiver according to claim 2, wherein, The at least one digital input / digital output mode selection circuit further includes: An input power MOSFET is electrically connected to the general-purpose input / output multiplexer.

4. The digital signal transceiver according to claim 3, wherein, The at least one digital input / digital output mode selection circuit further includes: A current limiter is electrically connected to the input power MOSFET and the terminal block.

5. The digital signal transceiver according to claim 4, wherein, The at least one digital input / digital output mode selection circuit further includes: An output power MOSFET is provided, which is electrically connected to the general-purpose input / output multiplexer, the current limiter, and the terminal block.

6. The digital signal transceiver according to claim 5, further comprising: A signal isolator is electrically connected to the microcontroller and the general-purpose input / output multiplexer.

7. The digital signal transceiver according to claim 6, further comprising: A control bus isolator, the control bus isolator being electrically connected to the microcontroller and the multi-channel input / output expander. in, The microcontroller is configured to notify the multichannel input / output expander of the digital input / output mode of the at least one digital input / output mode selection circuit via the control bus isolator.

8. The digital signal transceiver according to claim 7, wherein, The multi-channel input / output expander is electrically connected to a digital input interrupt pin of the microcontroller; the control bus isolator is electrically connected to a control bus pin of the microcontroller; and the signal isolator is electrically connected to a mode selection signal pin of the microcontroller.

9. The digital signal transceiver according to claim 8, wherein, The microcontroller is configured to transmit a control signal, which is a high signal, to the general-purpose input / output multiplexer via the signal isolator so that the at least one digital input / digital output mode selection circuit acts as the digital output circuit.

10. The digital signal transceiver according to claim 8, wherein, The microcontroller is configured to transmit a control signal, which is a low signal, to the general-purpose input / output multiplexer via the signal isolator so that the at least one digital input / output mode selection circuit acts as the digital input circuit.

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