Nor Flash Forum Discussions

I am writing firmware to interface with NOR Flash S70FL01GS using Nordic SDK and ARM chip. Where can I find example source for SPI communication with NOR Flash?

Hi,

I am using the flash chip of CYPRESS, S25FL128SAGMFI000,  but I have some questions that I don't understand .

After power up, I did the RDSR1 command to read  the value of the Status Register 1 , I thought the SR1 value should be "00"H, but the result was "81"H.

(I did nothing after the chip was powered up, only read the SR1, besides, the RESET# was not used and was unconnected)

Could you help with to figure out why this happened?

here is the picture of the question.

Hello,

NOR Flash with automatic ECC function will generate valid ECC code when issuing the Write Buffer Programming command.

On the other hand, when executing the Single Word Programming command or overwriting data on the same page, the ECC code is invalid.

At this time, if data is read, can the data be read while ECC is invalid?

Or is the data itself read invalid?

MPN S29GL01GT10TFI010

Best Regards,

Naoaki Morimoto

Hi

I am using the flash chip of CYPRESS,S25FL128SAGNFI000, but I have some questions that i don't understand when I do the simulation.

I am doing the simulation of QPP command, but when I do the QPP command for several times , there are some of the cases that indicate there is a program error happen.

but these cases are the same except the address and the write data, So could you help me to find out why the program errors happen?

(the commadn execution is this:

the system send the qpp signal, then the FLASH control module send the commands to the flash chip like this sequence:

1, WREN+RDSR1 (make sure that the WEL is enable)

2, QPP+ADDRESS+DATA(quad mode, 32bit data )

3, RDSR1(polling to check the WIP )  )

But,

1, I do the qpp command like 6 times , the only differece between these cases is the different address and  different wite data.

But just like the figure, at the 2nd and 3rd time, the program error happened.

and  after the QPP + ADDRESS+DATA, then the first RDSR1, the SR1[6] is 1...

But I don't know why the program error happened...

Could you help me with the question?

Thanks again and looking forward to your reply~~~

hi.

I found information about NOR Flash in the following document.

http://www.cypress.com/file/275051/download

P. 23  3.3.5 NOR Flash

And I want to use this, but I can't find any sample programs of S25FL132K.

I found sample programs of S25l164K(FM_PDL_2.0.1/example/hsspi/hsspi_access_s25l164k),

but it doesn't work on FM0+.

Where is the document which shows me how to use S25FL132K ?

thanks.