CN103219042A - Circuit capable of realizing program burning through USB interface and memory circuit - Google Patents
Circuit capable of realizing program burning through USB interface and memory circuit Download PDFInfo
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- CN103219042A CN103219042A CN2013101419427A CN201310141942A CN103219042A CN 103219042 A CN103219042 A CN 103219042A CN 2013101419427 A CN2013101419427 A CN 2013101419427A CN 201310141942 A CN201310141942 A CN 201310141942A CN 103219042 A CN103219042 A CN 103219042A
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Abstract
The invention discloses a circuit capable of realizing program burning through a USB interface. The circuit comprises the USB interface, a diode D1, a switch tube Q1, a first resistor R1, a second resistor R2, a third resistor R3, a power input end and a burning signal output end, wherein the burning signal output end is connected to a program burning control signal end of a memory chip. The invention further discloses a memory chip comprising a memory chip body and the circuit capable of realizing the program burning through the USB interface; the burning signal output end of the circuit capable of realizing the program burning through the USB interface is connected with the program burning control signal end of the memory chip. A hardware circuit composed of the switch tube and the diode is used for controlling the state of the program burning control signal end of the memory chip so that an external device is capable of using the normal UBS interface, the empty chip software upgrade is performed on the memory chip, the product cost is lowered, and the operation is convenient.
Description
Technical field
The present invention relates to the electronic circuit technology field, relate in particular to a kind of circuit and memory circuitry of realizing burning program by USB interface.
Background technology
Along with the fast development of infotech, electronic product becomes increasingly complex, and is more and more higher to the requirement of hardware.At present, electronic product generally uses up to a hundred million internal memory, even bigger NAND FLASH stores data, to satisfy user's demand.
NAND FLASH is a kind of of flash internal memory, and it is inner to adopt non-linear macroelement pattern, for the realization of solid-state large-capacity internal memory provides cheap effective solution.But NAND FLASH is installed on the pcb board after can not directly finishing burning program by cd-rom recorder again.In plant produced, generally all be after being assembled to NAND FLASH chip on the pcb board, again by the Micro USB interface being installed in the periphery of NAND FLASH chip and cooperating the abbreviation of special-purpose OTG(On-The-Go) line, make the USB_ID pin shorted to earth of NAND FLASH chip realize program upgrade.
As shown in Figure 1, the Micro USB interface has more an ID pin than common USB interface, and this ID pin is connected to the USB_ID pin of NAND FLASH chip.When the USB_ID pin was low level ' 0 ', NAND FLASH chip was from being defaulted as main equipment, and this main equipment is reading of data from external slave unit.When the USB_ID pin was suspended state, NAND FLASH chip was from being defaulted as slave unit, and external main equipment can write data to this slave unit.
As shown in Figure 2, the interface of OTG wire rod is more special, and it comprises A end interface and B end interface, and the ID pin of A end interface is that short circuit connects GND, and the ID pin of B end interface is unsettled.The Micro USB interface that equipment 1 and equipment 2 all dispose, after equipment 1 and equipment 2 coupled together by the OTG line, the ID pin of the equipment 2 that the A end interface connects was dragged down, and is in low level ' 0 '.The ID pin of the equipment 1 that the B end interface connects is unsettled, is in high level ' 1 '.Be defaulted as main equipment so be connected to the equipment 2 of A end interface, and the equipment 1 of connection B end interface is defaulted as slave unit.
When the OTG line of external equipment (as computer) by special use is connected on the Micro USB interface of NAND FLASH chip, because the ID pin of this OTG line links together with the short circuit of GND pin, therefore the 4th pin (ID pin) of Micro USB interface is connected with the 5th pin (GND pin), the signal of the USB_ID pin of NAND FLASH chip is a low level ' 0 ' at this moment, NAND FLASH chip is from being defaulted as main equipment, can be from external equipment (as computer) read-write program, thereby finish burning program.
Yet, the above-mentioned OTG line that passes through Micro USB interface and special use is to the method for NAND FLASH burning program, the user can not directly use the common USB interface that NAND FLASH is carried out software upgrading, needs to buy in addition special-purpose Micro USB adapter, has increased user's use cost.And NAND FLASH chip can not be used as slave unit and come burning program, is not easy to the user NAND FLASH is carried out program upgrade.
Summary of the invention
The embodiment of the invention proposes a kind of circuit and memory circuitry by USB interface realization burning program, and is easy to operate, and can reduce cost.
The embodiment of the invention provides a kind of circuit by USB interface realization burning program, comprises USB interface, diode D1, switching tube Q1, first resistance R 1, second resistance R 2, the 3rd resistance R 3, power input and burning signal output part;
One end of described first resistance R 1 is connected with described power input, the other end ground connection of described first resistance R 1; One end of described the 3rd resistance R 3 is connected with described burning signal output part, the other end ground connection of described the 3rd resistance R 3;
First end of described switching tube Q1 and the supply pin of described USB interface are connected; Second end of described switching tube Q1 is connected with an end of described second resistance R 2, and the other end of described second resistance R 2 is connected with described burning signal output part; The control end of described switching tube Q1 is connected with described power input;
The positive pole of described diode D1 is connected with described power input, and the negative pole of described diode D1 is connected with the power end of described USB interface.
Further, described circuit also comprises power management chip; Described power management chip comprises power output end, and described power output end is connected with described power input; Described power management chip is used to control described power output end output voltage or output voltage not.
The embodiment of the invention also provides a kind of memory circuitry, comprises memory chip, and the above-mentioned circuit that passes through USB interface realization burning program; The burning signal output part of the described circuit of realizing burning program by USB interface and the burning program control signal end of described memory chip are connected.
The circuit and the memory circuitry that pass through USB interface realization burning program that the embodiment of the invention provides, main by a switching tube and the hardware circuit that diode is built, come the state of the burning program control signal end of control store chip, make external equipment (for example computer) can use the common USB interface, realization is carried out the software upgrading of sky sheet to memory chip, and do not need to use special-purpose USB cable or adapter, not only reduced cost of products, also strengthened the versatility between the distinct device, made the exchanges data between the equipment convenient.In addition, memory chip can be worked as slave unit, also can work as main equipment, is convenient to carry out between external equipment and the memory chip information interaction.
Description of drawings
Fig. 1 is the structural representation of the Micro USB interface of prior art;
Fig. 2 is two structural representations that equipment connects by the OTG line in the prior art;
Fig. 3 is a structural representation of realizing the circuit of burning program by USB interface provided by the invention;
Fig. 4 is the structural representation by the power management chip in the circuit of USB interface realization burning program provided by the invention;
Fig. 5 is the synoptic diagram of an application scenarios of the circuit of realizing burning program by USB interface provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Referring to Fig. 3, be the structural representation of realizing the circuit of burning program by USB interface provided by the invention.
The embodiment of the invention provides a kind of circuit by USB interface realization burning program, comprises USB interface, diode D1, switching tube Q1, first resistance R 1, second resistance R 2, the 3rd resistance R 3, power input (USB_5V as shown in Figure 3) and burning signal output part (Ctrl as shown in Figure 3).Specific as follows:
One end of first resistance R 1 is connected with power input, the other end ground connection of first resistance R 1; One end of the 3rd resistance R 3 is connected with the burning signal output part, the other end ground connection of the 3rd resistance R 3.
(the 1st pin POWER) connects the supply pin of first end of switching tube Q1 and USB interface (stand CN1 as shown in Figure 3); Second end of switching tube Q1 is connected with an end of second resistance R 2, and the other end of second resistance R 2 is connected with the burning signal output part; The control end of switching tube Q1 is connected with power input.
The positive pole of diode D1 is connected with power input, and the negative pole of diode D1 is connected with the power end of USB interface.
In an optional embodiment, the above-mentioned circuit that passes through USB interface realization burning program also comprises first capacitor C 1; One end of described first capacitor C 1 and the supply pin of described USB interface are connected, the other end ground connection of described first capacitor C 1.
In another optional embodiment, the above-mentioned circuit that passes through USB interface realization burning program also comprises second capacitor C 2; One end ground connection of described second capacitor C 2, second end of the other end of described second capacitor C 2 and described switching tube Q1 is connected.
Preferably, above-mentioned switching tube Q1 is that (full name is the PMOS pipe: positive channel Metal Oxide Semiconductor); First end of switching tube Q1 is the source S of PMOS pipe, and second end of switching tube Q1 is the drain D of PMOS pipe, and the control end of switching tube Q1 is the grid G of PMOS pipe.
Need to prove that when concrete the application, above-mentioned switching tube Q1 can also adopt the metal-oxide-semiconductor or the triode of other types.
The circuit that passes through USB interface realization burning program that the foregoing description provides can further include power management chip.
Referring to Fig. 4, be the structural representation by the power management chip in the circuit of USB interface realization burning program provided by the invention.Described power management chip comprises power output end, and described power output end is connected with above-mentioned power input.Be terminal USB_5V shown in Figure 4, be connected with terminal USB_5V shown in Figure 3.Described power management chip is used to control described power output end output voltage or output voltage not.
The circuit that passes through USB interface realization burning program that the embodiment of the invention provides can perhaps as the peripheral circuit of memory chip, be used to realize the burning program of memory chip as an individual devices.During concrete enforcement, describedly realize that by USB interface the burning signal output part Ctrl of the circuit of burning program is connected to the burning program control signal end USB_ID of memory chip.
When needs carried out burning program to memory chip, power management chip control power output end is output voltage not; When memory chip is finished burning program, power management chip control power output end output voltage (for example 5V voltage).
Above-mentioned memory chip can be a NAND FLASH chip, or the chip of other types.
Referring to Fig. 5, be the synoptic diagram of an application scenarios of the circuit of realizing burning program by USB interface provided by the invention.Present embodiment is an example with NAND FLASH chip only, and the principle of work that USB interface realizes the circuit of burning program of passing through that the embodiment of the invention is provided is elaborated.
The circuit that passes through USB interface realization burning program that the embodiment of the invention provides is reduced to circuit 502 as shown in Figure 5.External equipment 501(such as computer) be connected on the USB interface of circuit 502 by the USB cable, the burning signal output part of circuit 502 is connected to the burning program control signal end USB_ID of NAND FLASH chip 503.
After system powered on, power management chip control power output end is output voltage not, and this moment, PMOS pipe Q1 was in conducting state, and the 5V voltage that provides from the USB port of external equipment 501 has been provided terminal VBUS.When terminal VBUS has had 5V voltage, carry out dividing potential drop by second resistance R 2 and the 3rd resistance R 3 after, the USB_ID signal pins of NAND FLASH chip 503 is in the state of high level ' 1 '.NAND FLASH chip 503 is from being defaulted as slave unit (Device), and external equipment 501 is main equipment (Host).External equipment 501 can burning program in NAND FLASH chip 503, thereby finish program upgrade to NAND FLASH chip 503.
After NAND FLASH chip is finished program upgrade, power management chip control power output end output 5V voltage, this moment, PMOS pipe Q1 was in cut-off state, and the voltage of terminal VBUS is 0V.The USB_ID signal pins of NAND FLASH chip 503 is drop-down by the 3rd resistance R 3, and this USB_ID signal pins is in low level ' 0 ' state.NAND FLASH chip 503 is from being defaulted as main equipment (Host), and external equipment 501 is slave unit (Device).NAND FLASH chip 503 can carry out reading and writing data to external equipment 501.
The embodiment of the invention also provides a kind of memory circuitry, comprises memory chip, and the foregoing description provide pass through the circuit that USB interface realizes burning program.The burning signal output part of the above-mentioned circuit that passes through USB interface realization burning program and the burning program control signal end of described memory chip are connected.
In one embodiment, described memory chip is a NAND FLASH chip.
When needs carried out burning program to described memory chip, described power management chip was controlled not output voltage of described power output end; When described memory chip was finished burning program, described power management chip was controlled described power output end output voltage.
The circuit and the memory circuitry that pass through USB interface realization burning program that the embodiment of the invention provides, main by a switching tube and the hardware circuit that diode is built, come the state of the burning program control signal end of control store chip, make external equipment (for example computer) can use the common USB interface, realization is carried out the software upgrading of sky sheet to memory chip, and do not need to use special-purpose USB cable or adapter, not only reduced cost of products, also strengthened the versatility between the distinct device, made the exchanges data between the equipment convenient.In addition, memory chip can be worked as slave unit, also can work as main equipment, is convenient to carry out between external equipment and the memory chip information interaction.
The above is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (8)
1. the circuit by USB interface realization burning program is characterized in that, comprises USB interface, diode D1, switching tube Q1, first resistance R 1, second resistance R 2, the 3rd resistance R 3, power input and burning signal output part;
One end of described first resistance R 1 is connected with described power input, the other end ground connection of described first resistance R 1; One end of described the 3rd resistance R 3 is connected with described burning signal output part, the other end ground connection of described the 3rd resistance R 3;
First end of described switching tube Q1 and the supply pin of described USB interface are connected; Second end of described switching tube Q1 is connected with an end of described second resistance R 2, and the other end of described second resistance R 2 is connected with described burning signal output part; The control end of described switching tube Q1 is connected with described power input;
The positive pole of described diode D1 is connected with described power input, and the negative pole of described diode D1 is connected with the power end of described USB interface.
2. the circuit by USB interface realization burning program as claimed in claim 1 is characterized in that described circuit also comprises first capacitor C 1;
One end of described first capacitor C 1 and the supply pin of described USB interface are connected, the other end ground connection of described first capacitor C 1.
3. the circuit by USB interface realization burning program as claimed in claim 1 is characterized in that described circuit also comprises second capacitor C 2;
One end ground connection of described second capacitor C 2, second end of the other end of described second capacitor C 2 and described switching tube Q1 is connected.
4. as each described circuit of claim 1 to 3, it is characterized in that described switching tube Q1 is the PMOS pipe by USB interface realization burning program; First end of described switching tube Q1 is the source electrode of PMOS pipe, and second end of described switching tube Q1 is the drain electrode of PMOS pipe, and the control end of described switching tube Q1 is the grid of PMOS pipe.
5. the circuit by USB interface realization burning program as claimed in claim 4 is characterized in that described circuit also comprises power management chip; Described power management chip comprises power output end, and described power output end is connected with described power input; Described power management chip is used to control described power output end output voltage or output voltage not.
6. a memory circuitry is characterized in that, comprises memory chip, and as each described circuit of realizing burning program by USB interface of claim 1～5;
The burning signal output part of the described circuit of realizing burning program by USB interface and the burning program control signal end of described memory chip are connected.
7. the circuit by USB interface realization burning program as claimed in claim 6 is characterized in that described memory chip is a NAND FLASH chip.
8. as claim 6 or 7 described circuit, it is characterized in that when needs carried out burning program to described memory chip, described power management chip was controlled not output voltage of described power output end by USB interface realization burning program;
When described memory chip was finished burning program, described power management chip was controlled described power output end output voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310141942.7A CN103219042B (en) | 2013-04-23 | 2013-04-23 | Circuit and the memory circuitry of burning program is realized by USB interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310141942.7A CN103219042B (en) | 2013-04-23 | 2013-04-23 | Circuit and the memory circuitry of burning program is realized by USB interface |
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| Publication Number | Publication Date |
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| CN103219042A true CN103219042A (en) | 2013-07-24 |
| CN103219042B CN103219042B (en) | 2016-08-24 |
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Cited By (5)
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| CN103813207A (en) * | 2014-02-27 | 2014-05-21 | 联想(北京)有限公司 | Information processing method, upgrade device and upgrade card |
| CN106201933A (en) * | 2014-10-07 | 2016-12-07 | 新唐科技股份有限公司 | Control device, controlled device and operation method |
| CN106354684A (en) * | 2016-10-13 | 2017-01-25 | 福建星海通信科技有限公司 | PX2 chip-based universal serial bus (USB) On-The-Go (OTG) function switching circuit |
| CN106849263A (en) * | 2017-03-23 | 2017-06-13 | 深圳市乐迪高科技有限公司 | A kind of power supply unit, electric power system, method of supplying power to |
| CN107145370A (en) * | 2017-05-02 | 2017-09-08 | 贵州航天电子科技有限公司 | A kind of FLASH memory online burning device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103813207A (en) * | 2014-02-27 | 2014-05-21 | 联想(北京)有限公司 | Information processing method, upgrade device and upgrade card |
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| CN106354684A (en) * | 2016-10-13 | 2017-01-25 | 福建星海通信科技有限公司 | PX2 chip-based universal serial bus (USB) On-The-Go (OTG) function switching circuit |
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| CN107145370A (en) * | 2017-05-02 | 2017-09-08 | 贵州航天电子科技有限公司 | A kind of FLASH memory online burning device |
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| CN103219042B (en) | 2016-08-24 |
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