Nor Flash

Program Status bit, bit4 of Status Register, drives to 1 when Program fails. Is this flag set for any reason?

Is 1 set in Program status bit of Status register even when programming fails due to exceeding 100K of P/E Endurance?

Dear Sir,

客户目前在选型与Altera FPGA （具体FPGA型号：5ceba4U15）搭配使用的Nor Flash，主要用于存储FPGA的配置程序， SPI通信，8引脚，256Mbit或者512Mbit,  目前我这给客户推荐的型号是：S25FS 512 S AG N F I 01 1 ,  您那能否给些建议？谢谢。

The customer is currently selecting NOR Flash for use with Altera FPGA (specific FPGA model: 5CEBA4U15), which is mainly used to store FPGA configuration program, SPI communication, 8-pin, 256Mbit or 512Mbit. Currently, the model I recommend to the client is S25FS 512 S AG N FI 01 1, could you give me some suggestions?thank you

Hi

Is there a "blank check" command for S70FLO1GS product?

If not, what is the simple and fastest way to do "erase verification" after bulk erasing?

thanks

Ely

FLASH: S25FL256S (Uniform 64KB sectors)

Hi,

I was trying to program my QSPI flash memory on my board.

However, it seems that the first 8 bytes in each bank (128Mb) of flash cannot be written.

The 0x00000000~0x00000007 and 0x01000000~0x01000007 always remains as 0xFF after erase, and cannot be programmed again.

Here is what i did:

1. Erase the whole chip using Bulk Erase Command. [Send: 0x60]

2. Perform a blank-check in 0x00000000~0x000000FF and 0x01000000~0x010000FF. [Read back, all the bytes are 0xFF]

3. Program 0x00000000~0x000000FF and 0x01000000~0x010000FF with an increased number serial (0x00~0xFF)

   [Send: 0x12      0x00 0x00 x00 0x00      0x00 ... 0xFF]

   [Send: 0x12      0x01 0x00 x00 0x00      0x00 ... 0xFF]

4. Read back. (The first 8 bytes cannot be written)

 0x00000000~0x0000100F: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF  0x08 0x09 0x0A 0x0B ... 0xFD 0xFE 0xFF

 0x01000000~0x0100000F: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF  0x08 0x09 0x0A 0x0B ... 0xFD 0xFE 0xFF

But when I try other addresses, such as 0x00000100~0x00000200, I can read exactly what I write.

How can I write the first 8 bytes in each bank of S25FL256S ?

THANKS!