Hi,I came across something as below while i was looking for downcounters.And this is really interesting !!" Downwriting is possible in...
Hi,I came across something as below while i was looking for downcounters.And this is really interesting !!" Downwriting is possible in Flash Memory .Flash-Cells are proberly usable as downcounters.Start with bytewise "FF" and ure able to reprogram this flash-cell withevery valuethat means not to bring a flash-data-BIT from "0" to "1". "How is it possible to make the Flash mem...
Hello,I'm looking for a flash emulator that will support the 64MBP33 NOR flash from Intel, part # RC48F4400P0TB00 (leaded)...
Hello,I'm looking for a flash emulator that will support the 64MBP33 NOR flash from Intel, part # RC48F4400P0TB00 (leaded) orPC48F4400P0TB00 (lead free).By flash emulator, I mean an active device that can take theplace of the flash part in circuit, uses RAM to emulate theflash memory, and has an ethernet or USB connection tomake reloading the memory significantly faster thanrep...
Hello,I have an application where I will have a LCD display with several menus and so I will want to have lots of const arrays of text...
Hello,I have an application where I will have a LCD display with several menus and so I will want to have lots of const arrays of text stored in flash.Does anyone know if you can read from internal flash memory, (i.e. access constants stored in flash) with a Atmel AT91SAM7S64?Someone was telling me there is no way to read from internal flash while executing code from the flash on thi...
Is there any reason why the SPI flash chips always have the protected area in the upper addresses at the end of the available memory? ...
Is there any reason why the SPI flash chips always have the protected area in the upper addresses at the end of the available memory? All of the CPUs that I know start booting from the SPI flash by reading some information which begins at the address 0. So if the beginning of the flash gets corrupt, then the CPU is dead and we can't reprogram the flash by software. Therefore it se...
Dear all, I am new to flash file system.Can some one point me to somebasics regarding flash file system?I am not aware whats flash...
Dear all, I am new to flash file system.Can some one point me to somebasics regarding flash file system?I am not aware whats flash filesystem and the need for it?Also it will be helpful if someone couldlet me know about design aspects of flash file system.Our customer has given requirement to have one on the flash.I googled web,but did not find anything relevant to the basics...
Hello folks,I am using Atmel flash AT49BV322DT in a custom dsp board i am building.the dsp is a TI 320DM641. I have written test software...
Hello folks,I am using Atmel flash AT49BV322DT in a custom dsp board i am building.the dsp is a TI 320DM641. I have written test software that erases, writesand reads from the flash.When I send the sequence of erase commands to the flash, I am able to seewrite signals on the scope. Shortly thereafter, I also see the Ready/Busy/output from the flash go low, as expected. Same thing w...
Dear gurus, Can you advice me how to test FLASH and NVRAM Memory using Clanguage?I am not aware what should be the methodology I must...
Dear gurus, Can you advice me how to test FLASH and NVRAM Memory using Clanguage?I am not aware what should be the methodology I must beusing.Further,for testing the flash,do i need flash programmer?Or whathardware setup is required to test NVRAM and FLASH?Typically My h/whas got a NVRAM and a flash and I am asked to develop some softwarebased on C language to test these Mem chips.Ne...
Dear All, Two years I attended a Hitachi Embedded Seminar. They presented theirembedded low power Flash microcontrollers there. The Presenter...
Dear All, Two years I attended a Hitachi Embedded Seminar. They presented theirembedded low power Flash microcontrollers there. The Presenter said: "If you look to the die you'll see that the cpu is only a smallfraction and the flash part occupies much of it. Especially if theflash size is > 32k." If this is real why don't they change the architecture to save someflash size?Any Comm
I am trying to write to the Flash on a Logic PD Development Kit using a Sharp LH79524 to write to a Sharp LH28F128SPHTD. I know the hardware is...
I am trying to write to the Flash on a Logic PD Development Kit using a Sharp LH79524 to write to a Sharp LH28F128SPHTD. I know the hardware is fine because I can program the flash using a debugger and code happily runs from it.The flash uses the CFI interface and writing 0x98 to (Flash Base) + 0x55h correctly returns the 'Q' 'R' and 'Y' query string. Writing 0x60 and then 0xD0 is su...
Hi,Im working on a prototype board for the AT91rm9200. I have beenfollowing the design of the AT91rm9200 EK.In using the same flash as...
Hi,Im working on a prototype board for the AT91rm9200. I have beenfollowing the design of the AT91rm9200 EK.In using the same flash as the obe used on the board, i have a smallproblem. Why have buffers been used between the chip`s lines and thelines of the flash? i have seen boards that use different flash chips and dont havebuffers for the flash. What is the use of the buffer ...
Hi,In my design I want to use the compact flash interface to my processorin FPGA. In the development board ACE controller is in between...
Hi,In my design I want to use the compact flash interface to my processorin FPGA. In the development board ACE controller is in between compactFlash and processor. I think the power PC access the ace controller forall read of Flash. Are there anyways I can make this flash as justmemory device (PROM), and access without ACE controller. I'd seen somearticles saying usage of flash as non ...
previously, I have successfully connected an SPI based flash memory toa 5V system using resistors to drop the voltage down from 5v to 3.3 vfor...
previously, I have successfully connected an SPI based flash memory toa 5V system using resistors to drop the voltage down from 5v to 3.3 vfor the CS, CLK & SI lines and a FET controled by the flash for the3.3v to 5v, SO connection.I now have to directly connect a flash chip to the address and datalines of a microcontroller. I now have to deal with something like 34lines instead of 4...
-I'm working with the LPC2119, and need to program the Flash via IAP,it's kind of an upgrade to the flash code.-I'm using the Interworking...
-I'm working with the LPC2119, and need to program the Flash via IAP,it's kind of an upgrade to the flash code.-I'm using the Interworking feature.-I start making an executable region for the flash programming in RAM,so i can erase the flash and still working, BUT in someway, the codein the RAM has references in part of the ROM, they are the veneers,and as i erased the flash, i can't f...
I am surveying a serial flash for storing data.I found the datasheet do not definitely mention the flowwing issues:1. What is there, NOR or...
I am surveying a serial flash for storing data.I found the datasheet do not definitely mention the flowwing issues:1. What is there, NOR or NAND type cell, in a SERIAL FLASH?2. Is a wear-leveling necessary for a serial Flash?Is anyone can tell me?Grateful to any comment.Thanks.
Hello!I?d like to connect either one or two flash-roms to a 32bit-processor (motorola coldfire 5272).I found some documentation at...
Hello!I?d like to connect either one or two flash-roms to a 32bit-processor (motorola coldfire 5272).I found some documentation at amd.com, they suggest two possibilities:When using one chip, A[0...N-1](Flash) should be connected to A[1...N](CPU).When using two chips, A[0...N-1](Flash) should be connected to A[2...N+1](CPU).Those two wiring methods are not compatible, I can not...
I am working with samsung s3c2410 and ST M29W320T flash.The flash is AMD type Nor.I am using trace32 and going to check flash interface.As...
I am working with samsung s3c2410 and ST M29W320T flash.The flash is AMD type Nor.I am using trace32 and going to check flash interface.As far as I heard, to check flash interface one should download file.not just assigning value like checking SDRAM.Please let me know site or information on how to do this or trace32cmm file.Please answerThanks.
I'm using the 2.6.10 kernel on a custom circuit board based onFreescales MCF5485evb evaluation board. My board has different flashmemory...
I'm using the 2.6.10 kernel on a custom circuit board based onFreescales MCF5485evb evaluation board. My board has different flashmemory than the evaluation board and so requires different flashdrivers than the BSP that was provided with the board.The flash memory I am using is the Intel P33 (256P33B) NOR flash. Ihave two chips with the chip selects tied to the same logic line. The...
One of the boards I am working on has a 16-bit STMicro NOR flash.According to the datasheet, four cycles are required to program theflash...
One of the boards I am working on has a 16-bit STMicro NOR flash.According to the datasheet, four cycles are required to program theflash through software.1) 0x555 = 0xAA2) 0x2AA = 0x553) 0x555 = 0xA04) actual address = actual dataMy questions are:a) In 1), 2) and 3) above, does the flash's internal mechanismactually write the given data bytes at the given locations, fore...
Folks,We need to store some non-volatile parameters across power-ups and I'mtrying to determine how to programmatically write to FLASH in...
Folks,We need to store some non-volatile parameters across power-ups and I'mtrying to determine how to programmatically write to FLASH in theMCF52235 Coldfire V2 processor (256KB). From the reference manual itlooks like reads from the ENTIRE FLASH are disabled when updating(erasing/programming) any part of the FLASH, even if you're justupdating one of the 32 8 KB sectors. But I'm not...
Hello all,I have to program the internal flash (it is called UC3F) of an MPC563PowerPC. After having read the Reference Manual's chapter...
Hello all,I have to program the internal flash (it is called UC3F) of an MPC563PowerPC. After having read the Reference Manual's chapter three times,I still don't understand fully how to write a sequence of bytes to theflash. I am sure that it is not that difficult, but it's the firsttime I have this kind of task.From what I understand:In order to rewrite the flash, you must fi...
