Tagged Questions

4
votes
2answers
123 views

How NAND Flash controllers erase single pages efficiently?

I'm working on some code to manage a NAND flash and I need to erase single pages, given that the smallest erasable unit is a block, the only solution I could think of is to: Erase a reserved block ...
1
vote
0answers
51 views

Interfacing NAND flash with USBMSD

I'm trying to read files from a NAND flash (K9LAG08U0M) that I took off an old MP3 player, so far I've been able to read the NAND contents successfully by interfacing it to my PC as a USBMSD (Mass ...
-1
votes
3answers
177 views

Serial NOR Flash - Vague

What are the structural differences between Serial NOR Flash and Parallel NOR Flash? If there is a structural difference , then What are the differences between Serial NOR Flash and Serial NAND Flash? ...
2
votes
1answer
70 views

Buffering Micro-SD data for power saving useful?

I have a datalogger which has only 4KB of SRAM, and because of that it needs to flush its buffer to MicroSD every second. Would adding external SRAM to create a larger buffer safe any significant ...
3
votes
1answer
101 views

Advantage of SanDisk iNAND?

I'm looking for a low-power microSD card for a datalogger, when I came across SanDisk's iNAND technology. What are some real-world advantages of those vs. microSD cards, except for their smaller ...
1
vote
2answers
765 views

Transferring a 1MB bitstream to a FPGA and reading it out

I am using Spartan 3E Starter Kit and I need to store a sequence of bits around 1MB long. It is a constant bitstream and will be known to me at the time of programming the board. I need to be able to ...
1
vote
2answers
464 views

What is flash memory wait states?

I'm using a freescale PowerPC microcontroller. In the flash memory module in the datasheet, the number of "wait states of the flash memory access" is configurable. The following is the part of the ...
9
votes
3answers
2k views

Reading a Micron 29F32G08QAA NAND Flash IC

It would be nice if this was a shopping question - but it is 99%+ likely to be an electronic construction question :-(. I wish to find the quickest / easiest / cheapest way to read a 4GB NAND Flash ...
3
votes
2answers
253 views

How is the smallest erasable unit of flash memory called?

Flash memory cells are erased for reprogramming not individually, but in large units of certain size. Here they are called segments, here — sectors, and here — simply blocks. What is the correct term ...
1
vote
5answers
273 views

Does reset do the same thing as shutting off the power to this device and turning it back on?

I am trying to control a serial dataflash memory through an mbed. It is an AT45DB021B and the datasheet is here. It has a reset pin that I have wired to the mbed so that a software reset can be done. ...
2
votes
2answers
76 views

How likely is it that this chip was damaged?

I am trying to use a dataflash memory that requires a voltage of 2.7 to 3.6. Before I was supplying it with too little voltage. Then I supplied it with 5V. Could either of these cause damage to the ...
0
votes
1answer
134 views

How to write data to this dataflash memory

I'm trying to write data to a W25P80 dataflash memory using an mbed. The documentation says there is a read data instruction for reading data from a section of memory by sending the opcode 03h ...
2
votes
1answer
964 views

How to read the device ID of a dataflash memory

I am trying to read the device ID of a serial flash memory by using the SPI connections on an mbed. In the datasheet for the serial flash memory W25Q80 there is this figure. The following is the ...
0
votes
1answer
74 views

Are there datasheets for this dataflash memory?

It's hard to read what is written on this dataflash memory but it looks like 25p80vg. I searched for datasheets and found some things similar to it, but couldn't find anything that matched it exactly. ...
0
votes
3answers
207 views

This flash memory works without connection to a power source or gnd?

I am doing a project where I need to store information into flash memory and read it back using an mbed. I can't get it to work right, but I noticed that even if there is no connection to power or ...
2
votes
3answers
229 views

Rewriting DataFlash pages

Atmel recommends: "if the reprogram operations occur in a random fashion in which any number of pages is updated in a random order, then the system must ensure that each page of the Serial ...
6
votes
2answers
766 views

ATA Interface for PIC

I've been considering using a NANDrive by SST in a new design, however I wasn't sure how complicated it would be to connect a PIC to the ATA interface on the NANDrive. I did a quick Google search and ...
6
votes
6answers
3k views

DIY USB Mass Storage Tutorial

I was just wondering if there was a tutorial anywhere on how to make your own USB Flash Drive and I don't mean take apart a USB and put the guts into something else, I mean put together the flash ...