CN203117970U - Circuit for converting hard disc IDE (integrated drive electronics) interface to USB (universal serial bus) interface - Google Patents
Circuit for converting hard disc IDE (integrated drive electronics) interface to USB (universal serial bus) interface Download PDFInfo
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- CN203117970U CN203117970U CN 201220709948 CN201220709948U CN203117970U CN 203117970 U CN203117970 U CN 203117970U CN 201220709948 CN201220709948 CN 201220709948 CN 201220709948 U CN201220709948 U CN 201220709948U CN 203117970 U CN203117970 U CN 203117970U
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- usb
- ide
- interface
- module
- bridge joint
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Abstract
The utility model discloses a circuit for converting a hard disc IDE (integrated drive electronics) interface to a USB (universal serial bus) interface. The circuit comprises an IDE interface module, a USB interface module, a serial EEPROM (electrically erasable programmable read-only memory) module, and a voltage conversion module, wherein the IDE interface module, the USB interface module and the EEPROM module are respectively connected with a USB/IDE interface bridging control module. The circuit has the advantages that the function of using a movable hard disc and a computer to successfully identify and transmit data through USB data lines is realized, and the defect that the hot plugging of the data transmission is not supported by the hard disc of the prior art is overcome.
Description
Technical field
The utility model relates to a kind of hard-disk interface change-over circuit, and especially a kind of hard disk ide interface changes usb circuit.
Background technology
Along with popularizing of development of science and technology and network, various electronic products and mobile concept constantly develop to fields such as personal entertainment leisure from business office, the individual especially gets more and more faster in the demand growth aspect mobile storage to the demand of documentation storage.In recent years, in the market about mobile storage, portable hard drive is with himself higher access rate with respect to the storage of light medium, more easily access procedure and with respect to flash memory storage bigger a series of advantages such as capacity, space shared on market is also more big, more and more is subjected to people's favor.
The brand and model of USB bridge joint control chip is very many on the market, these chips have been realized one based on ATA I (AT Attachment, AT Attachment Packet Interface) or ATAPI(AT Attachment Packet Interface, AT additional packet interface) mass-memory unit port and the bridging functionality of USB port are connected to USB port computing machine to the hard disk power supply and make the hard disk operate as normal by data line.
Because hot plug is not supported in original serial ports and parallel port, so the user when using external equipment, needs shutdown that the parallel or serial port cable is connected start again.
The utility model content
At the prior art problem, technical problem to be solved in the utility model has provided a kind of hard disk ide interface of the transmission support hot plug of portable hard drive that makes changes usb circuit.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of hard disk ide interface changes usb circuit, comprises the ide interface module, usb interface module, the serial EEPROM memory module that are connected with USB/IDE port bridge joint control module respectively; Wherein,
It is the bridge joint control chip of CY7C68300A that described USB/IDE port bridge joint control module adopts model;
Described ide interface module comprises the ide interface with 16 bit data pins; 16 bit data pins of described ide interface are connected with the DD0-DD15 data transmission pin of described bridge joint control chip;
Described usb interface module comprises USB slot, first diode, first, second and third resistance, electric capacity; One end of described electric capacity connects an end of second, third resistance and the VBUS pin of described bridge joint control chip, the other end ground connection of the other end of described electric capacity and the 3rd resistance respectively; The other end of described second resistance connects an end of described first resistance, the VBUS pin of USB slot respectively, and the other end of described first resistance connects the anode of described first diode, the plus earth of described first diode; The D+ of described USB slot is connected with DPLUS, the DMINUS pin of described bridge joint control chip respectively with the D-pin;
Described serial EEPROM memory module comprises the AT24C02 chip; The SCL of described AT24C02 chip, SDA end connects SCL, the SDA pin of described bridge joint control chip respectively.
As improvement of the present utility model, described usb interface module adopts 5V voltage as operating voltage.
As further improvement of the utility model, also comprise voltage transformation module; The 5V voltage transitions that described voltage transformation module provides usb interface module is the required 3.3V voltage of bridge joint control chip CY7C68300A.
This hard disk ide interface changes the defective that data transmission that usb circuit overcomes portable hard drive in the prior art is not supported hot plug, can realize easily that portable hard drive and computing machine successfully identify and transmit the function of data by the usb data line.
Description of drawings
Fig. 1 is that a kind of hard disk ide interface changes the usb circuit schematic diagram;
Fig. 2 is the ide interface module circuit diagram;
Fig. 3 is the usb interface module circuit diagram;
Fig. 4 is the voltage transformation module circuit diagram.
Embodiment
Be elaborated below in conjunction with the technical scheme of accompanying drawing to utility model:
As shown in Figure 1, a kind of hard disk ide interface changes usb circuit, comprises the ide interface module, usb interface module, serial EEPROM memory module, the voltage transformation module that are connected with USB/IDE port bridge joint control module respectively.It is the bridge joint control chip of CY7C68300A that USB/IDE port bridge joint control module adopts model.
As shown in Figure 2, the ide interface module comprises the ide interface with 16 bit data pins.16 bit data pins of ide interface are connected with the DD0-DD15 data transmission pin of bridge joint control chip CY7C68300A.
As shown in Figure 3, usb interface module comprises USB slot, first diode, first, second and third resistance, electric capacity.Wherein, an end of electric capacity connects an end of second, third resistance and the VBUS pin of bridge joint control chip, the other end ground connection of the other end of electric capacity and the 3rd resistance respectively.The other end of second resistance connects an end of first resistance, the VBUS pin of USB slot respectively.The other end of first resistance connects the anode of first diode, the plus earth of first diode.The D+ of USB slot is connected with DPLUS, the DMINUS pin of bridge joint control chip respectively with the D-pin.In the native system, when the moment USB_PV port that USB powers on is high level, along with capacitance discharges USB_PV port becomes low level.USB interface connects computing machine by data line, and light emitting diode is power lights, and data are transmission by D+ and D-data.
The serial EEPROM memory module comprises the AT24C02 chip.The SCL of AT24C02 chip, SDA end connects SCL, the SDA pin of bridge joint control chip respectively.The serial EEPROM memory module is used for handling the data of USB device, and data are fed to the EEPROM device when the rising edge arrival that the clock of SCL is imported, and when the SCL negative edge arrives data are read from device.
The usb interface module circuit of portable hard drive adopts 5V voltage as operating voltage.Voltage transformation module as shown in Figure 4 comprises that model is the voltage transitions chip of AMS1117-3.3.It 2 is connected with the VCC pin of 4 ports with CY7C68300A bridge joint control chip.The 5V voltage transitions that this module provides USB is the required 3.3V voltage of CY7C68300A chip.
Claims (3)
1. a hard disk ide interface changes usb circuit, it is characterized in that: comprise USB/IDE port bridge joint control module, the ide interface module, usb interface module, the serial EEPROM memory module that are connected with described USB/IDE port bridge joint control module respectively; Wherein:
It is the bridge joint control chip of CY7C68300A that described USB/IDE port bridge joint control module adopts model;
Described ide interface module comprises the ide interface with 16 bit data pins; 16 bit data pins of described ide interface are connected with the DD0-DD15 data transmission pin of described bridge joint control chip;
Described usb interface module comprises USB slot, first diode, first, second and third resistance, electric capacity; One end of described electric capacity connects an end of second, third resistance and the VBUS pin of described bridge joint control chip, the other end ground connection of the other end of described electric capacity and the 3rd resistance respectively; The other end of described second resistance connects an end of described first resistance, the VBUS pin of USB slot respectively, and the other end of described first resistance connects the anode of described first diode, the plus earth of described first diode; The D+ of described USB slot is connected with DPLUS, the DMINUS pin of described bridge joint control chip respectively with the D-pin;
Described serial EEPROM memory module comprises the AT24C02 chip; The SCL of described AT24C02 chip, SDA pin connect SCL, the SDA pin of described bridge joint control chip respectively.
2. hard disk ide interface according to claim 1 changes usb circuit, it is characterized in that: described usb interface module adopts 5V voltage as operating voltage.
3. hard disk ide interface according to claim 1 changes usb circuit, it is characterized in that: also comprise voltage transformation module; The 5V voltage transitions that described voltage transformation module provides usb interface module is the required 3.3V voltage of bridge joint control chip CY7C68300A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220709948 CN203117970U (en) | 2012-12-20 | 2012-12-20 | Circuit for converting hard disc IDE (integrated drive electronics) interface to USB (universal serial bus) interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220709948 CN203117970U (en) | 2012-12-20 | 2012-12-20 | Circuit for converting hard disc IDE (integrated drive electronics) interface to USB (universal serial bus) interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203117970U true CN203117970U (en) | 2013-08-07 |
Family
ID=48898296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220709948 Expired - Fee Related CN203117970U (en) | 2012-12-20 | 2012-12-20 | Circuit for converting hard disc IDE (integrated drive electronics) interface to USB (universal serial bus) interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203117970U (en) |
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2012
- 2012-12-20 CN CN 201220709948 patent/CN203117970U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20141220 |
|
| EXPY | Termination of patent right or utility model |