Memories Forum Discussions

Hi

I try to erase quickly a memory NOR FLASH

for example a S25FL127S : 128Mbit = 32 seconds to clear all (with 50mA erase current !)

is it possible to start several block erase simultaneously ?

Are there faster memories in erase ?

thank you in advance

I am trying to communicate with a FM25L04B F-RAM on a custom board, based on Texas Instruments TMS320F28335. I am using Simulink to program the controller and exploring the various peripherals. The datasheet of  FM25L04B says that the CS pin has to be lowered for each instruction. I noticed that the WREN opcode is a single byte instruction, whereas a WRITE opcode, followed by the address and data byte makes a 3 byte instruction. I am wondering is I can instead use a fixed instruction length of 3 bytes and send 2 bytes dummy data after the WREN opcode to make it a 3 byte instruction as well. Will this method work?

Hello, I am new to NOR Flash technology. I am planning to use S25FS256S for my application for data storage. I would appriciate if someone would clarify some basic doubts about flash write and erase. 1.Can I overwrite a page (256 byte) of data instead of going for erase of entire 4kB sector followed by write? 2.Can you refer me some material that will make it simpler to understand Flash read/write/erase process,especially the ones provided by Cypress? Thank You in advance for attending my query. -- Regards, Sonam

Hi,

i'm after some advice on the best way to change data on the flash device.

I've typically used eeprom in the past and modifying individual bytes has never been an issue.

I see with the S25FL116k device, to write even 1 byte, that location must first be erased (0xFF). 

The smallest amount of data that can be erased is a sector (4kB). 

Does this mean that i must copy 4kB of data, erase the sector and then re-write with data along with my new data?

It seems like i'm missing something. 

How do other people approach this.

Kind regards,

Damian

Hi. Can anybody provide me with the qualification reports for parts  S29GL256P11FFI02, S25FL256SAGMFI001 and 

S25FL132K0XNFI010?

Does  "\T" in the part number AM29F040B-90JF\T means Tape and reel?

How many are in a reel for this obsoleted part AM29F040B-90JF\T , anyone knows? Thank you!

Hi,

I have implemented my design on an FPGA. I am trying to erase,write and read the SPI flash in the same order. I am able to erase and write properly but when i try to read soon after the write operation, it is showing all 1's. But if i give a power on reset to the flash and then read, it is showing the correct value which i wrote before. Please give some suggestions regarding this issue.