CN205725735U

CN205725735U - Communication interface multiplexing switching circuit, device and digital handset

Info

Publication number: CN205725735U
Application number: CN201620310344.7U
Authority: CN
Inventors: 童奉群; 付文良
Original assignee: KIRISUN COMMUNICATION CO Ltd
Current assignee: KIRISUN COMMUNICATION CO Ltd
Priority date: 2016-04-14
Filing date: 2016-04-14
Publication date: 2016-11-23
Anticipated expiration: 2026-04-14

Abstract

The utility model relates to wireless communication field, particularly relates to communication interface multiplexing switching circuit, device and digital handset, and this circuit includes: high-speed analog switch；Primary processor；AUI；Chip select logic module.This device includes above-mentioned communication interface multiplexing switching circuit and annex connecting line.This digital handset includes above-mentioned communication interface multiplexing switching circuit.Above-mentioned communication interface multiplexing switching circuit, device and digital handset, by the Intelligent Recognition to AUI for the chip select logic module, control high-speed analog switch switches over, the i.e. connection of two interface modules of switching and primary processor, so that the interface type of primary processor is identical with the interface type that AUI connects accordingly, the I/O that this process does not needs to take primary processor detects and controls, the multiplexing of the switching to AUI USB and UART is completed in the case of reducing and take main frame host processor resources, simple and reliable.

Description

Communication interface multiplexing switching circuit, device and digital handset

Technical field

The utility model relates to wireless communication field, particularly relates to communication interface multiplexing switching circuit, device And digital handset.

Background technology

The embedded software of Wireless Telecom Equipment, including driver (firmware) and application program, typically will Ask in the case of being not switched on device housings, be capable of outside quick upgrading, be used for more New function or repair leakage Hole.

The typically common method of industry is the external accessory interface (programming by intercom (being commonly called as " hand platform ") Interface) on USB or UART communication interface, equipment access PC main frame complete software upgrading, or Write the configuration etc. of frequency and various function choosing-item.

Generally conventional way, as it is shown in figure 1, use line program to connect PC main frame by AUI, is set up PC and the communication of hand platform main frame primary processor, the internal FLASH program storage of opponent's platform is written and read, complete One-tenth program is replaced.

AUI does not has standard criterion, and there is the definition of oneself typically each instrument factory commercial city.But it is because connecing Mouth size and pin number quantitative limitation, except input and output I/O and power supply output, the ground connection etc. of some necessity Necessary signal, typically define only a kind of communication interface, UART or USB, but communication interface is only One form of which can be supported.

Utility model content

Based on this, it is necessary to for how completing to attached in the case that minimizing takies main frame host processor resources The switching multiplying question of part interface USB and UART, provides a kind of communication interface multiplexing switching circuit, device And digital handset.

A kind of communication interface multiplexing switching circuit, comprising: high-speed analog switch；Primary processor, described main place Reason utensil has first interface module and the second interface module, described first interface module and described second interface Module is connected with described high-speed analog switch respectively；AUI, described AUI and described High Speed Analog Switch connects；Chip select logic module, described chip select logic module respectively with described high-speed analog switch and institute State AUI to connect.

Wherein in an embodiment, described first interface module is usb interface module, described second interface Module is UART interface module.

Wherein in an embodiment, described high-speed analog switch includes: control port, public port, often Closed end mouth and normally opened port；Described usb interface module is connected with described normally closed port；Described UART connects Mouth die block is connected with described normally opened port；Described AUI is connected with described public port；Described chip select is patrolled Collect module to be connected with described control port and described AUI respectively.

Wherein in an embodiment, described high-speed analog switch is single pole double throw analog switch.

A kind of intercom accessory communication interface multiplexing switching device, including above-mentioned communication interface multiplexing switching electricity Road and annex connecting line, described annex connecting line is connected with described AUI, is used for connecting outside calculating Machine.

A kind of digital handset, including above-mentioned communication interface multiplexing switching circuit.

Above-mentioned communication interface multiplexing switching circuit, device and digital handset, by chip select logic module to attached The Intelligent Recognition of part interface, control high-speed analog switch switches over, i.e. two interfaces of switching and primary processor The connection of module, so that the interface type phase that the interface type of primary processor is connected with AUI accordingly With the I/O that this process does not needs to take primary processor detects and controls, and takies the main process of main frame in minimizing The multiplexing of the switching to AUI USB and UART is completed in the case of device resource, simple and reliable.

Brief description

Fig. 1 is the structural representation that traditional intercom is connected with PC；

Fig. 2 is the functional module connection diagram of the utility model one embodiment communication interface multiplexing switching circuit；

Fig. 3 is the functional module connection diagram of another embodiment communication interface multiplexing switching circuit；

Fig. 4 is the interface diagram of the utility model one embodiment high-speed analog switch；

The wiring schematic diagram of Fig. 5, Fig. 6 and Fig. 7 line program blank area pin respectively.

Detailed description of the invention

Understandable for enabling above-mentioned purpose of the present utility model, feature and advantage to become apparent from, below in conjunction with attached Detailed description of the invention of the present utility model is described in detail by figure.Elaborate much have in the following description Body details is in order to fully understand the utility model.But the utility model can be retouched at this to be much different from The alternate manner stated is implemented, and those skilled in the art can be in the case of without prejudice to the utility model intension Doing similar improvement, therefore the utility model is not limited by following public specific embodiment.

It should be noted that when an element is considered as " connection " another element, it can be direct It is connected to another element or may be simultaneously present centering elements.Hand platform described in the utility model is i.e. hand-held Intercom, uses this noun for ease of user understands, not as limiting of its scope.

Refer to Fig. 2, which is the functional module of the utility model one embodiment communication interface multiplexing switching circuit even Connecing schematic diagram, communication interface multiplexing switching circuit 10 includes: high-speed analog switch the 101st, primary processor is the 102nd, AUI 103 and chip select logic module 104.

In the present embodiment, high-speed analog switch 101 switchs for single pole double throw analog.

Primary processor 102 has first interface module 112 and the second interface module 122.First interface module 112 and second interface module 122 be connected with high-speed analog switch 101 respectively.In the present embodiment, first connects Mouth die block 112 is usb interface module, and the second interface module 122 is UART interface module.

AUI 103 is connected with high-speed analog switch 101.AUI 103 i.e. intercom is used for connecting External accessory or the interface of equipment, also known as hand platform AUI 103.

Chip select logic module 104 is connected with high-speed analog switch 101 and AUI 103 respectively.

Chip select logic module 104 is for, after identifying that AUI 103 is connected with computer, controlling high speed mould Intend switch 101 switching so that AUI 103 is individually connected with bluetooth module.

By the Intelligent Recognition to AUI for the chip select logic module, control high-speed analog switch switches over, The i.e. connection of switching and two interface modules of primary processor so that the interface type of primary processor accordingly with The interface type that AUI connects is identical, and the I/O that this process does not needs to take primary processor detects and controls System, completes to AUI USB and UART in the case of reducing and take main frame host processor resources Switching multiplexing, simple and reliable.

In one embodiment, high-speed analog switch 101 includes: control port, public port, normally closed port with And normally opened port.Usb interface module is connected with normally closed port.UART interface module is connected with normally opened port. AUI 103 is connected with public port.Chip select logic module 104 respectively with control port and AUI 103 connect.

Such as Fig. 2, the present embodiment includes two-way high-speed analog switch and a switch logic, and related standard Communication interface forms.Its essential core circuit is a two-way SPDT high-speed analog switch circuit, in switching The switching of line interface is entered under signal control.I.e. by specific line program, enable the host to automatically identify annex The interface type of line program, switches accordingly.

Below handoff procedure is divided into two parts to be respectively described.

(1) USB interface

When using USB line program to connect AUI, by the coding pin setting in joint, main frame electricity The Combinational Logic Control switching analoging switch that road sets is as USB interface.Specifically such as Fig. 3, analog switch is in Normally closed (NC) position, COM1 has linked NC1, and COM2 end is connected to NC2 end, now, mould Intending switch is USB interface.

(2) UART interface

When using UART line program to connect AUI, by the coding pin setting in joint, main frame The Combinational Logic Control switching analoging switch of circuit configuration is UART interface.Specifically such as Fig. 3, analog switch exists Switching under the Intelligent Recognition control of combinational logic, COM1 has linked NO1, and COM2 end is connected to NO2 end, now, analog switch is UART interface.

During additionally, disconnect the connection of specific line program and AUI, analog switch recovers acquiescence even automatically Connect, be i.e. defaulted as USB interface.

Advantage of this embodiment is that, it is not necessary to the IO taking primary processor detects and controls, it is achieved know Not and switching, it is multiplexed hand platform accessory communication interface.It is appreciated that this form is simply unique, low cost, hold Easily implement, convenient reliable and stable.

Referring to Fig. 4, U1 is a piece of high speed USB switching analoging switch, such as the NLAS7242 of ONSEMI, Inside comprises single-pole double throw (SPDT) analog switch of two-way independence, and data rate bandwidth can be supported up to 950MHz.Signal pins :/OE piece selects, S is that path selects, D+ and D-is one group of public port, D1+ Being one group of normally closed port with D1-, D2+ and D2-is one group of normally opened port.

Switch Control logic true value table such as table 1 below:

Table 1

Corresponding D+ and D-being connected to analog switch U1 of TXD_DP_EXT with RXD_DN_EXT, be A pair data-signal of the USB interface of external accessory interface.

USB_DP_MAIN with USB_DN_MAIN is corresponding is connected to D1+ and D1-, is the main process of main frame A pair data-signal of the USB interface of device.

UART_RXD with UART_TXD is corresponding is connected to D2+ and D2-, is main frame primary processor A pair data-signal of UART interface.

The stitch 9 specified with AUI in main frame inside such as Fig. 5, OBSEL1 and OBSEL2 and stitch The two pins such as 11 connect, and are defaulted as internal pull-up, and annex stitch is defaulted as high level when unsettled.

OBSEL1 and OBSEL2 inputs a non-conjunction combinational logic U2, exports one and selects signal S, for controlling the switching of U1 analog switch, it is achieved truth table such as table 2 below, wherein 0 expression low level, 1 Represent high level.

Such as Fig. 5, in special line program joint, to corresponding difference should be grounded respectively with 11 by two stitch 9 Interface type.Wherein, the interface that line program joint is connected with computer PC includes USB and RS232.

Such as Fig. 6, in USB line program joint, OBSEL1 stitch 9 is grounded, and OBSEL2 stitch 11 is unsettled. Wherein, the interface that USB line program joint is connected with computer PC is usb type.

Such as Fig. 7, in UART line program joint, OBSEL1 stitch 9 is unsettled, and OBSEL2 stitch 11 connects Ground.Wherein, the interface that UART line program joint is connected with computer PC is RS232 interface type.

It when OBSEL1 stitch 9 and OBSEL2 stitch 11 is all unsettled, is defaulted as USB interface.

OBSEL1	OBSEL2	S	Type of attachment
				0	0	1	Retain
0	1	0	USB
				1	0	0	UART
1	1	0	It is defaulted as USB

Table 2

It is noted that the utility model further relates to a kind of accessory communication interface multiplexing switching device, this is attached Part communication interface multiplexing switching device includes above-mentioned communication interface multiplexing switching circuit and annex connecting line, Annex connecting line is connected with AUI 103.

For example, annex connecting line is line program.For example, annex connecting line is USB line program, for example this USB Line program has USB line program joint as shown in Figure 6；And for example, annex connecting line is UART line program, For example, this UART line program has UART line program joint as shown in Figure 7.

Annex connecting line is used for connecting outer computer, and chip select logic module 104 recognizes this annex connecting line After, the connection of two interface modules of control high-speed analog switch 101 switching and primary processor 102, so that The interface type of primary processor 102 is identical with the interface type that AUI 103 connects accordingly.

So, by specific line program, the communication interface multiplexing switching circuit of intercom main frame is enable certainly The dynamic interface type identifying annex line program, switches accordingly.

Additionally, it will also be appreciated that the utility model further relates to a kind of digital handset, including above-mentioned Communication interface is multiplexed switching circuit.

Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, not right The all possible combination of each technical characteristic in above-described embodiment is all described, but, if these skills There is not contradiction in the combination of art feature, is all considered to be the scope that this specification is recorded.

Embodiment described above only have expressed several embodiments of the present utility model, its describe more concrete and In detail, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that, it is right For those of ordinary skill in the art, without departing from the concept of the premise utility, can also do Going out some deformation and improving, these broadly fall into protection domain of the present utility model.Therefore, the utility model is special The protection domain of profit should be as the criterion with claims.

Claims

1. a communication interface multiplexing switching circuit, it is characterised in that include:

High-speed analog switch；

Primary processor, described primary processor has first interface module and the second interface module, and described first connects Mouth die block and described second interface module are connected with described high-speed analog switch respectively；

AUI, described AUI is connected with described high-speed analog switch；

Chip select logic module, described chip select logic module respectively with described high-speed analog switch and described annex Interface connects.

2. communication interface according to claim 1 multiplexing switching circuit, it is characterised in that described first Interface module is usb interface module, and described second interface module is UART interface module.

3. communication interface according to claim 2 multiplexing switching circuit, it is characterised in that described high speed Analog switch includes: control port, public port, normally closed port and normally opened port；

Described usb interface module is connected with described normally closed port；

Described UART interface module is connected with described normally opened port；

Described AUI is connected with described public port；

Described chip select logic module is connected with described control port and described AUI respectively.

4. communication interface according to claim 3 multiplexing switching circuit, it is characterised in that described high speed Analog switch is single pole double throw analog switch.

5. an intercom accessory communication interface multiplexing switching device, it is characterised in that include such as claim 1 to 4 arbitrary described communication interface multiplexing switching circuit and annex connecting line, described annex connecting line and institute State AUI to connect, be used for connecting outer computer.

6. a digital handset, it is characterised in that include the communication as described in Claims 1-4 is arbitrary Interface duplex switching circuit.