CN209929621U

CN209929621U - JTAG socket device for burning multiplex of multiple devices

Info

Publication number: CN209929621U
Application number: CN201920998098.2U
Authority: CN
Inventors: 韩威
Original assignee: Suzhou Wave Intelligent Technology Co Ltd
Current assignee: Suzhou Wave Intelligent Technology Co Ltd
Priority date: 2019-06-29
Filing date: 2019-06-29
Publication date: 2020-01-10
Anticipated expiration: 2029-06-29

Abstract

The utility model provides a multiplex JTAG socket arrangement is burnt to multiple device, include: the device comprises at least two devices to be burnt, a state switching module, a JTAG socket, a JTAG plug, a flat cable and an intelligent terminal, wherein one end of the state switching module is connected with burning interfaces of the at least two devices to be burnt, the other end of the state switching module is connected with the JTAG socket, the JTAG socket is correspondingly connected with the JTAG plug, and the JTAG plug is connected with the intelligent terminal through the flat cable, so that the various devices to be burnt, such as CPLD burning, SPI burning and the like, can realize respective burning by sharing one JTAG socket burning device, the working efficiency is improved, the cost of a connector on a board is saved, the realization is simple, software and hardware debugging is not needed, plug and play is realized, the debugging workload is not increased, a power supply circuit is not needed to be additionally added, even if the system is not.

Description

JTAG socket device for burning multiplex of multiple devices

Technical Field

The utility model belongs to the technical field of the device burns and specifically relates to a multiplex JTAG socket arrangement is burnt to multiple device.

Background

With the increasing variety of devices on the electronic product board, the demand of various devices on the online burning function is increasing, so that sockets with different sizes and specifications need to be placed on the board. Too much burning socket wastes valuable PCB area and interferes with PCB wiring, and too much socket also means increased single board development cost. Minimizing the number of on-board sockets is also one of the major problems that need to be addressed in hardware circuit design.

In a factory processing link, an SPI (Serial Peripheral Interface) FLASH (FLASH memory) is usually "burn first and then paste", that is, a program to be used is burned into the SPI FLASH, and then the SPI FLASH is soldered to a PCB. This also introduces a problem, when the version in the SPI FLASH needs to be changed, the SPI FLASH needs to be taken down first, the programmer is used to program the SPI FLASH, and the SPI FLASH is welded back to the board after the program is re-programmed. The debugging is extremely inconvenient in the initial stage of single board development, a large amount of unnecessary workload is increased, and the debugging efficiency is reduced.

On the other hand, because the new CPLD has no program inside when leaving the factory, a JTAG (Joint Test Action Group; Joint Test Group, i.e., JTAG interface) socket must be reserved for first power-on and subsequent debugging and burning during production. The JTAG socket is not suitable for interfaces with various signals due to the small quantity of the JTAG socket pins, and the JTAG socket is only used as a CPLD online burning interface generally. As shown in fig. 1, it can be seen that the JTAG socket can only burn CPLD alone, and there is no connection relationship with spiflah.

The JTAG socket can only be used for CPLD burning, resulting in a low utilization rate of the socket. When the SPI FLASH is burnt, the SPIFLASH needs to be taken down for independent burning and then welded back to the single board, a large amount of workload is increased by repeated welding, and the SPI FLASH bonding pad can be damaged after repeated welding, so that the working efficiency is not favorably improved, and the cost is increased.

Disclosure of Invention

The utility model discloses a solve the problem that exists among the prior art, the innovation has provided a multiplex JTAG socket device of multiple device burning record, makes CPLD burn record and burn record etc. multiple JTAG socket burning record device of waiting to burn device sharing and can realize burning record respectively with SPI, has improved work efficiency, the cost is reduced.

An aspect of the utility model provides a multiplex JTAG socket arrangement of multiple device burning record, include: the device comprises at least two devices to be burned, a state switching module, a JTAG socket, a JTAG plug, a flat cable and an intelligent terminal, wherein one end of the state switching module is connected with burning interfaces of the at least two devices to be burned, the other end of the state switching module is connected with the JTAG socket, the JTAG socket is correspondingly connected with the JTAG plug, and the JTAG plug is connected with the intelligent terminal through the flat cable.

In combination with the aspect, in a first possible implementation manner of the aspect, the state switching module is a buffer switch, and a switch enable end of the buffer switch is connected to the burning interfaces of at least two devices to be burned respectively.

Furthermore, the JTAG plug comprises at least two JTAG plugs, and a switch enabling signal sending end of the JTAG plug is connected with a switch enabling end of the buffer switch.

Furthermore, the number of the JTAG plugs, the number of the switch enabling ends of the buffer switches and the number of the devices to be burned are correspondingly the same.

In a second possible implementation manner of this aspect in combination with this aspect, at least two types of the JTAG plugs differ in line order.

Further, at least two kinds of JTAG plugs are selected to be connected with the JTAG socket.

In combination with this aspect, in a third possible implementation manner of this aspect, the intelligent terminal includes a PC.

In a fourth possible implementation form of this aspect in combination with this aspect, the model number of the snubber switch is PCA 9555.

The utility model discloses a technical scheme include following technological effect:

the utility model discloses a problem that exists among the prior art, the innovation has proposed multiple device burns and has burned multiplexing JTAG socket device, makes CPLD burn and wait that multiple treating burns such as SPI burns and burn a JTAG socket device of device sharing and can realize burning respectively, has improved work efficiency, saves the board and goes up the connector cost.

The utility model discloses the scheme is realized simply, need not the software and hardware debugging, plug-and-play, does not increase any debugging work load, and the Buffer price of use is very cheap, and market uses extensive very easily to find, does not need additionally to increase supply circuit, consequently does not have any restriction on using the scene, even the system does not normally go up the electricity, just can burn when waiting to burn the device and go up the electricity.

The utility model discloses need relapse the welded process on PCB when SPI FLASH burns record procedure has been removed from to the scheme, has reduced the harm to PCB, improves production and debugging efficiency.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

Drawings

For a clear explanation of the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for a person skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic diagram of a JTAG socket device for burning CPLD in the prior art;

fig. 2 is a schematic diagram of an embodiment of the present invention.

Detailed Description

In order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted so as to not unnecessarily limit the invention.

Example one

As shown in fig. 2, the utility model discloses technical scheme provides a multiplex JTAG socket arrangement is burnt to multiple device to CPLD and SPI FLASH are two kinds to be treated and are burnt the device and explain as the example, include: CPLD1, SPI FLASH2, state switching module 3, JTAG socket 4, JTAG plug 5, winding displacement 6, intelligent terminal 7, one end of state switching module 3 is connected with CPLD1, SPIFLASH 2's burn record interface respectively, the other end of state switching module 3 is connected with JTAG socket 4, JTAG socket 4 corresponds with JTAG plug 5 and is connected, JTAG plug 5 is connected with intelligent terminal 7 through winding displacement 6.

The state switching module 3 is a buffer switch, and a switch enable end of the buffer switch is connected to the burning interfaces of at least two devices to be burned respectively, specifically, a first switch enable end of the buffer switch is connected to the burning interface of the CPLD1, and a second switch enable end of the buffer switch is connected to the burning interface of the SPI FLASH.

The JTAG plug 5 includes two kinds of JTAG plugs, i.e., a first JTAG plug 51 and a second JTAG plug 52, a switch enable signal transmitting terminal of the first JTAG plug is connected to a first switch enable terminal of the buffer switch, and a switch enable signal transmitting terminal of the second JTAG plug is connected to a second switch enable terminal of the buffer switch.

The snubber switch needs to have two independent parts, each part has a separate switch enable (OE) for controlling the on and off, and the two switch enable terminals are separately controlled in the snubber switch. The control logic is referred to the following table

When the first switch enable end is turned on, the first JTAG plug 51 is connected to the JTAG socket 4, and since the second switch enable end is turned off, the signal on the first JTAG plug can only reach the left CPLD burning interface corresponding to the first switch enable end through the buffer switch, and is connected to the left CPLD burning interface, without affecting the signal on the SPI FLASH.

When the second switch enable end is opened and the first switch enable end is closed, the second JTAG plug signal is communicated with the left SPI FLASH through the buffer switch, and at the moment, only the SPI FLASH is burnt, and the CPLD cannot be influenced.

The number of JTAG plugs, the number of switch enabling ends of the buffer switches and the number of devices to be burned are correspondingly the same.

The line order of the first JTAG plug 51 is different from that of the second JTAG plug 52. When the circuit is used, the JTAG plug is required to be ensured to normally control the opening and closing of the enabling end of the switch. For example: when the first JTAG plug 51 is plugged into the JTAG socket 4, only the first switch enable terminal can be turned on, and when the second JTAG plug is plugged into the JTAG socket 4, only the second switch enable terminal can be turned on, so that the situation that the first switch enable terminal and the second switch enable terminal are turned on at the same time cannot occur.

A first JTAG plug 51 and a second JTAG plug 52 are connected to the JTAG socket 4 alternatively.

The embodiment of the utility model provides an in intelligent terminal can include the PC, also can be other terminals, the utility model discloses do not limit here. The embodiment of the utility model provides an in the model of buffer switch be PCA9555, also can select according to actual need, the utility model discloses do not limit here.

The utility model relates to a multiplex JTAG socket arrangement is burnt in stake just can realize just using the exact JTAG plug freely burning record to CPLD and SPI FLASH and switch, and guarantee that there is not the influence each other between two devices, make CPLD burn record and burn record etc. multiple JTAG socket burning record device of waiting to burn record device sharing and can realize burning record respectively with SPI, improved work efficiency, save the board and go up the connector cost.

The embodiment of the utility model provides an use CPLD and SPI FLASH two kinds to wait to burn the record device as the example, explain, also can include more than two kinds and wait to burn the record device, the utility model discloses do not restrict here.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims

1. A multiplex JTAG socket device for burning multiple devices is characterized by comprising: the device comprises at least two devices to be burned, a state switching module, a JTAG socket, a JTAG plug, a flat cable and an intelligent terminal, wherein one end of the state switching module is connected with burning interfaces of the at least two devices to be burned, the other end of the state switching module is connected with the JTAG socket, the JTAG socket is correspondingly connected with the JTAG plug, and the JTAG plug is connected with the intelligent terminal through the flat cable.

2. The multi-device burning multiplexing JTAG socket device of claim 1, wherein the state switching module is a buffer switch, and a switch enabling end of the buffer switch is connected to burning interfaces of at least two devices to be burned respectively.

3. The multi-device burning multiplexing JTAG socket device of claim 2, wherein the JTAG plugs comprise at least two JTAG plugs, and a switch enable signal transmitting terminal of the JTAG plugs is connected with a switch enable terminal of the buffer switch.

4. The multi-device burning multiplexing JTAG socket device of claim 3, wherein the number of the JTAG plugs, the number of the switch enabling ends of the buffer switches, and the number of the devices to be burned are correspondingly the same.

5. The multi-device burn multiplexing JTAG socket device of claim 3, wherein at least two of the JTAG plugs have different wire sequences.

6. The multi-device burn multiplexing JTAG socket device of claim 5, wherein one of at least two types of the JTAG plugs is connected to the JTAG socket.

7. The multi-device burn multiplexing JTAG socket apparatus of claim 1, wherein said intelligent terminal includes a PC.

8. The multi-device burn multiplexing JTAG socket device of any one of claims 2-6, wherein the buffer switch is of the PCA9555 type.