Memories Forum Discussions

Hello
DSP is testing to write up to 1MB of data with S25FL128L memory through SPI communication.

I wrote 16byte data in memory and checked R/W up to 1 block (64KB) (SPI Baudrate : 30Mhz)

The problem occurs when 1 block (End Address: 0x0ff) is written and the next 2 Blocks (Start Address: 0x1000) is written.

Problem
1. Data is not written normally in 2 Blocks.
2. Writing data in 2 Blocks changes the data in 1 Block.

please share your knowledge

For Flash S29GL064S90TFI030, during Parallel NOR Flash Sector Erase operation how to read other sectors data? Is it possible to do so? I am planning to use Status Register to check the status of the Erase operation.

Do I need to initiate Read Array command during status check loop to read the Flash memory data for other sector? Will it allow doing this?

S29GL064N90TFI030

Hi,

I am Anil Patil. I am working on the Flash driver for S29GL032N on ADSP BF534.

We are facing one issue with the Flash driver. The firmware application does not use any RTOS or OS.

When Flash driver is in Erase operation and status is being checked for completion, if we try to access contents of some other sectors in the Flash, it reads the status of the ongoing Erase operation. Expectation is other sectors memory locations should be able read the programmed data. Instead it reads the status of the Erase operation.

Is this the right behavior of the Flash. Datasheet mentions that the status will be available if the access address is for the sector being erased. But this is not correct, other sectors also reads the same ongoing operation status instead of the programmed content in that Flash memory area.

Could you help us solve this issue. We need to access the rest of the sectors data while operations like Erase or Write are in progress. Flash programmed data read accesses for other Sectors should not be blocked during these operations. Can this be done? If yes, how?

I am sharing you the schematic sections of the PCB we are using interfacing the Flash to the BF534 DSP for your easy reference.

Also, below is the debug data which will help you to understand the issue.

Normally when there is no Erase or Program operation going on below is the Flash content for some other sector where we have our data.

But while Erase operation is in progress we see different data in those sectors shown below. This data is clearly the Status of the ongoing Flash operation and not what is actually programmed in Flash in those locations.

Hope you understand the issue what is happening.

Let us know if you understood the issue or need help understand some of the above part.

Let us know if there is any solution for the above problem we are facing.

Regards,

Anil Patil

M: +91 9049810593

To Technical Support:

I was wondering if you could provide die verification for one of your products, S25FL128SAGNFI011. Upon exposing the die, the markings revealed 98740A. My question is are these markings correct for this device?

Our company does component authentication for a government prime contractor who requires to have the die markings match the external markings exactly or receive verification from the manufacturer.

I have included pictures of the component going through authentication testing and a picture of the die markings revealed post decapsulation.

Thank you in advance for any assistance that you are able to provide.

Kind Regards

Hi,

I want to use S26KL128SDABHN030 memory with STM32L4+ microcontroller. I read that this memory has DCARS feature. Is it possible to disable it to use this memory without PSC signal?