JP3121939U - Non-volatile memory data read / write controller - Google Patents

Abstract

A data read / write control device for a non-volatile memory is provided.
The microcontroller includes a data / address bus and some control pins, which are responsible for data read / write control, and the memory controller includes a flash memory controller, a first-in first-out cache unit and an error correction unit. The flash memory controller is connected to the microcontroller control pins, data / address bus, and the flash memory controller is connected to the non-volatile memory by the non-volatile memory bus, and the flash memory controller is connected between the microcontroller and the non-volatile memory. Data read / write conversion and control interface. The first-in first-out cache unit is connected to the microcontroller and the debug unit, and provides a data read / write buffer function. The debug unit is connected to the flash memory controller and the non-volatile memory, and provides an error correction function for reading and writing data.
[Selection] Figure 2

Description

  The present invention is a data read / write control device for a non-volatile memory, and is particularly applied to read / write of data in a non-volatile memory such as a flash memory, and also uses a single memory controller to read / write data in a non-volatile memory. It is a device that controls.

  Non-volatile memory is widely used in computer hosts or consumer electronic devices. For example, USB thumb drives and flash memories in MP3 players are the most common non-volatile memory application fields. However, the known nonvolatile memory data read / write control model includes a microcontroller A1, a first bus controller A2, and a second bus controller A3 as shown in FIG. Among them, the microcontroller A1 is connected to the first bus controller A2 by the first bus B1, the first bus B1 is an address and data bus, and the first bus controller A2 is further connected to the second bus B2 by the second bus. The second bus B2 connected to the controller A3 is a different type of bus such as USB or IDE. The second bus controller A3 is further connected to the non-volatile memory A4 by a third bus B3, and the third bus B3 is a different type of bus such as USB, IDE, etc. that is equivalent to the second bus B2. The microcontroller A1, the first bus controller A2 and the second bus controller A3, the first bus B1, the second bus B2 and the third bus B3 together form a data read / write control structure of the nonvolatile memory A4. The microcontroller A1 reads and writes data in the nonvolatile memory A4 by sending data by connecting the first bus controller A2 and the second bus controller A3, the first bus B1, the second bus B2 and the third bus B3 in order. To control.

  The above-described data read / write control structure of the non-volatile memory A4 shown in FIG. 1 has a microcontroller A1, a first bus controller A2, a second bus controller A3, a first bus B1, It is necessary to go through multi-stage circuit connection such as two buses B2 and third bus B3 and multi-layer interface conversion, and connection and data read / write control between the microcontroller A1 and the non-volatile memory A4 by the simplest direct interface. Can not do. For data read / write control of the non-volatile memory A4, serious time delay and waiting time disadvantages are brought about. In addition, connection using a large number of controllers such as the microcontroller A1, the first bus controller A2 and the second bus controller A3 and a large number of buses such as the first bus B1, the second bus B2 and the third bus B3 This complicates the circuit structure, increases the manufacturing cost of the product, and makes it impossible to complete the data read / write buffer and error correction at the same time, further increasing the waiting time for data read / write.

  Therefore, a main object of the present invention is to provide a data read / write control device for a nonvolatile memory. Among these, a microcontroller and a memory controller are provided, and the microcontroller is connected to a memory controller via a control pin and a data / address bus, and the memory controller is connected to a nonvolatile memory via a nonvolatile memory bus. Thereby, the read / write control of the non-volatile memory can be achieved only by passing through the microcontroller and the memory controller, the delay factor of the data transfer time of the circuit can be eliminated, and the circuit structure is simplified to lower the production cost of the product.

  Another object of the present invention is to provide a data read / write control device for a non-volatile memory, in which the memory controller includes a flash memory controller, a first-in first-out buffer unit, and a debug unit. The controller serves as an interface for data read / write control between the microcontroller and the non-volatile memory. In addition, the first-in first-out buffer unit and the debug unit provide the buffer and error correction for the read / write data control, the data buffer and the error correction process can be completed at once, and the data read / write control can be performed more accurately and quickly.

  In order to achieve the above object, the nonvolatile memory data read / write control device of the present invention includes a microcontroller and at least one memory controller. Among them, the microcontroller is provided with a data / address bus and some control pins, and the microcontroller is in charge of data read / write control. The memory controller includes a flash memory controller, a first-in first-out buffer unit, and a debug unit. The flash memory controller is connected to a microcontroller control pin, data / address bus, and the flash memory controller is further connected to a non-volatile memory by a non-volatile memory bus, and the flash memory controller is connected to the microcontroller and the non-volatile memory. It can be used as a data read / write conversion and control interface between memory. The first-in first-out buffer unit is connected to the microcontroller and the debug unit, and provides a buffer function for reading and writing data. The debug unit is connected to a flash memory controller and a non-volatile memory, provides an error correction function for data read / write, and realizes a data read / write control function for the non-volatile memory of the present invention.

The invention of claim 1 is a data read / write control device for a nonvolatile memory comprising a microcontroller and a memory controller.
The microcontroller provides a data / address bus and some control signal pins,
The memory controller should be connected to the microcontroller data / address bus and each control signal pin, and connected to the nonvolatile memory via the nonvolatile memory bus to provide a data read / write control interface between the microcontroller and the nonvolatile memory. A nonvolatile memory data read / write control device.
The device of claim 2 is the data read / write control device for nonvolatile memory according to claim 1, wherein the memory controller includes a flash memory controller, a first-in first-out buffer, and a debug unit.
The flash memory controller is connected to the data / address bus of the microcontroller, each control signal pin and the nonvolatile memory bus, and serves as a data read / write control interface for the microcontroller and the nonvolatile memory.
A first-in first-out buffer connects to the data / address bus of the flash memory controller and microcontroller, provides a data buffer and temporary storage for non-volatile memory data read / write control, and
The debug unit is connected to a first-in first-out buffer, a flash memory controller, and a non-volatile memory bus, and provides data error correction for non-volatile memory data read / write control. It is a device.
According to a third aspect of the present invention, there is provided a data read / write control apparatus for a non-volatile memory according to the first aspect, wherein the non-volatile memory connected to the memory controller is a flash memory. Control device.

  A kind of nonvolatile memory read / write controller, which includes a microcontroller and a memory controller. Among them, the microcontroller has a data / address bus and some control pins, which are responsible for data read / write control, the memory controller is a flash memory controller, first-in first-out (FIFO) cache unit and error correction ( (Error Correction) unit. The flash memory controller is connected to a microcontroller control pin, data / address bus, and the flash memory controller is connected to a non-volatile memory (NVM) by a non-volatile memory bus (NVM bus). The flash memory controller is used as a data read / write conversion and control interface between the microcontroller and the non-volatile memory. The first-in first-out cache unit is connected to the microcontroller and the debug unit, and provides a data read / write buffer function. The debug unit is connected to a flash memory controller and a non-volatile memory, and provides an error correction function for reading and writing data. As a result, it is possible to configure a control device that directly reads / writes data from / to the nonvolatile memory.

  First, see the display in FIG. The nonvolatile memory data read / write control device 100 of the present invention includes a microcontroller 10 and at least one memory controller 20. Among them, the microcontroller 10 is provided with a data / address bus 11 and some control signal pins 121 to 12N. The microcontroller 10 has a data read / write control function, and the microcontroller 10 does not have restrictions on the format of an 8-bit, 16-bit, 32-bit or 64-bit microcontroller chip.

  The memory controller 20 has a data read / write control interface function, and is connected to the data / address bus 11 and the control signal pins 121 to 12N of the microcontroller 10 described above. The memory controller 20 is connected to the non-volatile memory 200 via the non-volatile memory bus 201, and the memory controller 20 serves as a data read / write interface between the microcontroller 10 and the non-volatile memory 200. The microcontroller 10 does not need to go through multiple layers of bus and interface conversions, and directly uses the memory controller 20 as an interface, and the microcontroller 10 controls reading and writing of the nonvolatile memory 200. There is no limitation on the format of the non-volatile memory. The non-volatile memory 200 in the present invention is a flash memory, and all other memory devices having the same effect fall within the scope claimed by the present invention.

  See also the display in FIG. There is no limitation on the type of the memory controller 20 described above, and FIG. 2 is one of the preferred embodiments of the present invention. Other equivalent circuit devices or controllers should be within the scope claimed by the present invention. Among these, the memory controller 20 includes a flash memory controller 21, a first-in first-out buffer 22, and a debug unit 23. Among them, the flash memory controller 21 is connected to the data / address bus 11 of the microcontroller 10 and N control signal pins such as the control signal pins 12 to 12N. The flash memory controller 21 is connected to the nonvolatile memory 200 through the nonvolatile memory bus 201, and the flash memory controller 21 can be used as a data read / write control interface between the microcontroller 10 and the nonvolatile memory 200.

  The first-in first-out buffer 22 is connected to the flash memory controller 21 and the data / address bus 11, and provides a buffer function for the microcontroller 10 to read / write data in the nonvolatile memory 200. Provide direct use of mushrooms. The debug unit 23 is connected to the first-in first-out buffer 22, the flash memory controller 21, and the nonvolatile memory bus 201, and provides an error correction function when the microcontroller 10 reads / writes data from / to the nonvolatile memory 200. With the structure of the memory controller 20 described above, functions such as data read / write control, buffer and error correction of the nonvolatile memory 200 can be completed at once by a single device, and data read / write control of the nonvolatile memory 200 can be performed. Improve speed and efficiency.

It is a block diagram of a known non-volatile memory read / write control module. It is a system block circuit diagram of the present invention. It is a detailed circuit diagram of the memory controller of the present invention.

Explanation of symbols

100 Non-volatile memory data read / write control device 10 Microcontroller 11 Data / address bus
121 to 12N Control signal pin 20 Memory controller 201 Non-volatile memory bus 21 Flash memory controller 22 First-in first-out buffer 23 Debug unit 200 Non-volatile memory A1 Microcontroller A2 First bus controller A3 Second bus controller A4 Non-volatile memory B1 1 bus B2 2nd bus B3 3rd bus

Claims (3)

In a non-volatile memory data read / write control device comprising a microcontroller and a memory controller,
The microcontroller provides a data / address bus and some control signal pins,
The memory controller should be connected to the microcontroller data / address bus and each control signal pin, and connected to the nonvolatile memory via the nonvolatile memory bus to provide a data read / write control interface between the microcontroller and the nonvolatile memory. Nonvolatile memory data read / write control device. 2. The non-volatile memory data read / write control device according to claim 1, wherein the memory controller includes a flash memory controller, a first-in first-out buffer, and a debug unit.
The flash memory controller is connected to the data / address bus of the microcontroller, each control signal pin and the nonvolatile memory bus, and serves as a data read / write control interface for the microcontroller and the nonvolatile memory.
A first-in first-out buffer connects to the data / address bus of the flash memory controller and microcontroller, provides a data buffer and temporary storage for non-volatile memory data read / write control, and
The debug unit is connected to a first-in first-out buffer, a flash memory controller, and a non-volatile memory bus, and provides data error correction for non-volatile memory data read / write control. apparatus. 2. The non-volatile memory data read / write control device according to claim 1, wherein the non-volatile memory connected to the memory controller is a flash memory.

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