Hello
I am trying to read and program a Winbond 25Q64FWSIG memory which is supported by what I see in the documentation, but I cannot perform any operations.
I am using Arduino UNO as the interface. With the Winbond 25Q16BVSIG memory I was able to read and program it without problems and according to the list the supported memories are
Winbond W25Q16.V 2048 SPI OK OK OK OK 2,700 3,600
Winbond W25Q64.W 8192 SPI OK OK OK OK 1,700 1,950
From what I can understand that if it works with 25Q16BVSIG memory, it would have to work with 25Q64FWSIG, right?
I hope you can help me

Attached console output
ale@ale:~$ sudo flashrom -p serprog:dev=/dev/ttyACM0:115200 -r backupG5.bin
flashrom 1.4.0-devel (git:v1.2-1414-g2a5d2920) on Linux 5.10.0-28-amd64 (x86_64)
flashrom is free software, get the source code at https://flashrom.org

Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns).
serprog: Programmer name is "frser-duino"
serprog: requested mapping AT45CS1282 is incompatible: 0x1080000 bytes at 0x00000000fef80000.
serprog: requested mapping GD25LQ255E is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping GD25Q256D/GD25Q256E is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping IS25LP256 is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping IS25WP256 is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping MX25L25635F/MX25L25645G is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping MX25U25635F is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping MX25U25643G is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping MX25U51245G is incompatible: 0x4000000 bytes at 0x00000000fc000000.
serprog: requested mapping MX66L51235F/MX25L51245G is incompatible: 0x4000000 bytes at 0x00000000fc000000.
serprog: requested mapping MX66L1G45G is incompatible: 0x8000000 bytes at 0x00000000f8000000.
serprog: requested mapping MX77L25650F is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping N25Q00A..1G is incompatible: 0x8000000 bytes at 0x00000000f8000000.
serprog: requested mapping N25Q00A..3G is incompatible: 0x8000000 bytes at 0x00000000f8000000.
serprog: requested mapping N25Q256..1E is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping N25Q256..3E is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping N25Q512..1G is incompatible: 0x4000000 bytes at 0x00000000fc000000.
serprog: requested mapping N25Q512..3G is incompatible: 0x4000000 bytes at 0x00000000fc000000.
serprog: requested mapping MT25QL01G is incompatible: 0x8000000 bytes at 0x00000000f8000000.
serprog: requested mapping MT25QU01G is incompatible: 0x8000000 bytes at 0x00000000f8000000.
serprog: requested mapping MT25QL02G is incompatible: 0x10000000 bytes at 0x00000000f0000000.
serprog: requested mapping MT25QU02G is incompatible: 0x10000000 bytes at 0x00000000f0000000.
serprog: requested mapping MT25QL256 is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping MT25QU256 is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping MT25QL512 is incompatible: 0x4000000 bytes at 0x00000000fc000000.
serprog: requested mapping MT25QU512 is incompatible: 0x4000000 bytes at 0x00000000fc000000.
serprog: requested mapping S25FL256L is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping S25FL256S......0 is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping S25FL512S is incompatible: 0x4000000 bytes at 0x00000000fc000000.
serprog: requested mapping W25Q256FV is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping W25Q256JV_Q is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping W25Q256JV_M is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping W25Q256JW is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping W25Q256JW_DTR is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping W25Q512JV is incompatible: 0x4000000 bytes at 0x00000000fc000000.
serprog: requested mapping W25Q512NW-IM is incompatible: 0x4000000 bytes at 0x00000000fc000000.
serprog: requested mapping XM25QH256C is incompatible: 0x2000000 bytes at 0x00000000fe000000.
serprog: requested mapping XM25QU256C is incompatible: 0x2000000 bytes at 0x00000000fe000000.
Found Generic flash chip "unknown SPI chip (RDID)" (0 kB, SPI) on serprog.
===
This flash part has status NOT WORKING for operations: PROBE READ ERASE WRITE
This flash part has status UNTESTED for operations: WP
The test status of this chip may have been updated in the latest development
version of flashrom. If you are running the latest development version,
please email a report to flashrom@flashrom.org if any of the above operations
work correctly for you with this flash chip. Please include the flashrom log
file for all operations you tested (see the man page for details), and mention
which mainboard or programmer you tested in the subject line.
You can also try to follow the instructions here:
https://www.flashrom.org/contrib_howtos/how_to_mark_chip_tested.html
Thanks for your help!
Read is not working on this chip. Aborting.




Thank you so much