NAND model flash memory magnetic disk device and method for detection of logical bit address

A disk device and logic bit technology, applied in static memory, read-only memory, detection of faulty computer hardware, etc., can solve the problems of slow memory access data, slow search time, etc., to improve performance and improve processing speed. Effect

Inactive Publication Date: 2003-10-29
MEGAWIN TECH
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Problems solved by technology

This method is designed without SRAM, so it does not take up space, but because each time you want to find the logical address, you must search from the beginning, and the search time is slow, making the speed of memory access data very slow

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  • NAND model flash memory magnetic disk device and method for detection of logical bit address
  • NAND model flash memory magnetic disk device and method for detection of logical bit address
  • NAND model flash memory magnetic disk device and method for detection of logical bit address

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Embodiment Construction

[0033] The present invention copies and builds a part of the Partial Inverse Address Mapping Table (Partial Inverse Address Mapping Table) when the system is turned on, that is, a part of the physical / logical address mapping table, and utilizes the functions of hardware such as counters and comparators to cooperate with random memory The access memory itself has the characteristic of continuous reading, and a part of the physical / logical address mapping table in the random access memory is searched to obtain the logical address relative to the physical address.

[0034] When using data storage and reading in flash memory, each block available for data access has a physical address to represent the address of the actual physical memory in the memory, such as figure 2 As shown in (a), each block has a physical address and its corresponding logical address, and the physical address and logical address have a non-linear correspondence. When the system is powered on for initializa...

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Abstract

An NAND-type flash memory-magnetic disc device and a method for detecting its logic address are disclosed. Said method for detecting its logic address includes creating a partial reverse physical / logic address mapping table in RAM, and sequential searching in the mapping table until the logic address relative to the physical address is obtained. Its advantages are high processing speed and less possessed space.

Description

technical field [0001] The invention relates to a NAND (inverted AND gate) type flash memory disk device and a method for detecting logical addresses. Background technique [0002] In the operating principle of the memory, when the microprocessor uses the memory as a data storage area, the calculation results and data are stored here. If the program needs to be accessed, the storage area can also be accessed. When storing data and reading data, the microprocessor will define the address of the memory with the required information, and the microprocessor will send the address to the memory through the address bus, and then the data will send the corresponding data to the correct bit address. The most important thing about the memory is the reading time, from when the microprocessor issues an instruction to obtaining the address data, and after the memory responds, it sends the data to the microprocessor until the microprocessor actually receives the data. The time taken is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/22G11C16/06G11C29/00
Inventor 林晋贤
Owner MEGAWIN TECH
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