JFlashSPI not able to program a SPI-Flash

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    • JFlashSPI not able to program a SPI-Flash

      Hello.

      Im trying to program a AT45DB321E SPI-Flash with J-Flash SPI.
      I use v7.96 and v8.18, but it's not possible to program the chip.

      Autodetect shows: AT45DQ321 with Flash ID: 0x1F 27 01
      Connected is a: AT45DB321E with Flash ID: 0x1F 27 01 (01 00)

      After autoconnect, the page size was: 256 Bytes and 0x4000 Numpages.

      With this settings, a Erase is not possible, so i change the settings to: page size = 512 Byte, 0x2000 Numpages.
      After this, J-Flash-SPI v8.18 can erase the chip (readback show's: all data filled with 0xFF)

      The problem is: if i try to program&verify my data to the flash, wrong data (99.9% of the data in AT45DB321 is: 0xFF) are in the flash, and a error message is shown:
      Verification failed @ address 0x00000000 (Read: 0x00, Expected: 0x42)
      Failed to verify target.
      Failed to program and verify target.

      Same error, if i use the autodetect settings with 256 Byte Page!


      I try to write:
      0x42 0x46 0x53 0x5F .... (1MB data contents)

      Readback after progam&verfify shows:
      0000_0000: 0x00 0xFF 0xFF 0xFF ...... 0xFF

      0000_0010: 0xFF 0xFF 0xFF 0xFF ...... 0xFF
      and so on until 0x000001FF

      0000_0200: 0x00 0xFF 0xFF 0xFF ...... 0xFF
      0000_0210: 0x00 0xFF 0xFF 0xFF ...... 0xFF
      0000_0220: 0xFF 0xFF 0xFF 0xFF ...... 0xFF
      and so on until 0x0000040F

      I tested it with 30MHz, 8MHz, 300kHz : always the same error.

      The SPI-Lines are ok: level is 0 .. 3.3V @ Clock, CS, DI, DO
      Reset is pulled to 3.3V, WP is pulled to 3.3V
      Power supply is stable @ 3.3V

      So my question: is it possible to program a AT45DB321E SPI-Flash with J-Flash-SPI
      and what settings should be used?


      attachment: read-Back from the chip (with wrong data)
      Images

      • JFlashSPI_EKZQWR7jt1.jpg

        369.17 kB, 878×618, viewed 77 times

      The post was edited 1 time, last by Forster ().

    • Hello,

      The AT45DB321E can be configured with two different page sizes: 512 bytes and 528 bytes.
      J-Flash SPI only supports page sizes that are powers of 2.

      It is likely that your flash is configured with a 528-byte page size, which would explain why programming is not working.

      In J-Flash SPI, you can configure init steps (Project Settings -> Setup -> Init Steps) that are executed when connecting to the flash.
      I have attached a J-Flash SPI project that uses the init steps to change the page size to 512 bytes.

      Could you please test if this project works for your flash?

      Best regards,
      Simon
      Files
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    • Hello Simon.


      Many thanks for your help.


      I already had the same idea with re-initializing.
      Unfortunately this did not change anything.

      Even additional delays of 1ms after activating Chip Select and before deactivating Chip Select do not help.

      I tried again with your project file, but with the same failures.

      The AT45xxx is apparently not supported, or only with the 512Byte variant.
      As I currently only have 528 byte variants in stock, I am unfortunately unable to make any counter-attempts.