A flash memory control device and a flash memory mobile storage device

Abstract

The present invention discloses a flash memory control apparatus and a flash memory mobile storage apparatus. The flash memory control apparatus comprises a mobile device host interface unit, a command analysis unit, a data processing unit, a clock generator unit and a flash memory interface unit. The flash memory mobile storage apparatus comprises the flash memory control apparatus and a flash memory. The command analysis unit determines a data operation command sent by a mobile device host and generates a clock frequency control signal according to a determination result; the clock generator unit generates flash memory system clocks with different frequencies according to the clock frequency control signal; and the flash memory control apparatus reads and writes data according to the frequencies. According to the flash memory control apparatus and the flash memory mobile storage apparatus disclosed by the present invention, on the premise of satisfying maximum power supply current restriction of the mobile device host, the read / write performance of the flash memory is improved to the maximum extent.

Description

technical field [0001] The present invention relates to a flash memory control device and a flash memory mobile storage device, in particular to a command analysis unit that judges whether a data operation command sent by a mobile device host is a write command or a read command, and generates a clock frequency according to the judgment result Control signal, the clock generator unit can generate flash memory system clocks of different frequencies according to the clock frequency control signal, and access the flash memory through the flash memory interface unit according to this frequency, ensuring that the mobile device host accesses the flash memory with low power consumption and stable current Under the premise of requirements, a flash memory control device and a flash memory mobile storage device that maximize the read and write performance of the flash memory. Background technique [0002] At present, as the functions of today's mobile device hosts become more and more...

AI Technical Summary

Problems solved by technology

The maximum power consumption current of these mobile storage devices often determines whether it can pass the certification of mobile device manufacturers, and is also an important indicator to measure its performance. For example, the Apple MFI certification standard stipulates that when an iPhone is connected to an external storage device, it must During normal reading and writing operations, the current cannot exceed 100 milliamperes. The existing technology uses the same frequency flash memory system clock when writing and reading flash memory. Due to the characteristics of the memory itself, it takes longer time and higher current to write to flash memory than to read, which is a big challenge for mobile device hosts with limited maximum current

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