Method for multimedia application processor compatible with various NandFlash
An application processor, multimedia technology, applied in the direction of memory address/allocation/relocation, etc., can solve problems such as powerlessness, and achieve the effect of stable and convenient access
Active Publication Date: 2009-06-17
ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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Problems solved by technology
However, when the embedded system needs to support more and more Nandflash with complex structures and varying timings, the original model becomes inadequate.
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[0024] The multimedia application processor adopts a mobile multimedia processor with low power consumption. The main features of the chip are as follows: 1) It adopts a 32-bit processor; 2) It has advanced power management technology; 3) It supports multi-chip Nandflash and has MMC / SD card interface; 4) Embedded AMR decoder, MP3 decoder, WMA decoder, 64-Tone MIDI synthesizer, AAC / +decoder, etc.; 5) Embedded image processor, M / JPEG accelerator, H.263 / H.264 / MPEG4 decoder; supports multiple serial ports; 6) supports USB Host / Slave function; 7) supports CCIR / ITU 656 / 601 image sensor interface, and has I2S, PCM and other audio interfaces; 8) supports TFT LCD and / or OLED monitor. It can be seen from the above that the chip is powerful, so that the functions and performance of the entire system can be fully reflected. Its high integration reduces the production cost of the system and has better market competitiveness.
[0025] Such as figure 2 , The multimedia application proce...
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The invention discloses a method for multimedia application processor compatible with various Nandflash, comprising: 1. connecting each Nandflash onto a corresponding chip selection of the processor, and short-circuiting R / b (ready / busy indicating pins) of each Nandflash and then connecting to the R / b of the processor; 2. abstracting the each common physical characteristics to compose to a specific data structure list based on different physical characteristics of the Nandflash; 3. configuring the corresponding register based on each Nandflash AC time sequence parameter and so on physical characteristics; accessing each Nandflash conveniently of the MTD layer of the system based on a structure body and a pointer. The invention can abstract various physical characteristics of the Nandflash as the common structure body by a driving layer, can provide the structure body and a function pointer to the MTD layer, simultaneously can control the processor to enable the processor to output an appropriate read-write time sequence to access the Nandflash, thereby ensuring the upper layer application of the MTD and the FS, without concerning the bottom layer various Nandflash types, the various Nandflash memory devices can be accessed conveniently and stably.
Description
technical field [0001] The invention relates to a method for storing and reading data by using a multimedia application processor compatible with various Nandflash storage devices (including single-chip or multi-chip nandflash of different manufacturers and models). Background technique [0002] In recent years, the rapid development of portable electronic products has put forward new requirements for memory, such as: small size, large capacity, low power, non-volatility and shock resistance. Therefore, traditional hard disks and memory are not suitable for new portable systems. The biggest difference between flash memory and general DRAM or SRAM is that flash memory can preserve data integrity when there is no power supply, and it is a non-volatile memory. Moreover, flash memory has power saving function and shock resistance, and is the best storage medium in mobile device applications, so flash memory has become the best memory solution for embedded computing systems. ...
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Inventor 易若翔范敬才胡胜发
Owner ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD