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Altera_Forum
Honored Contributor
Honored ContributorCFI Flash Reset Command
I'm using the NIOS HAL CFI routines to access (read/write) an AMD FLASH. Looking at the waveforms, the HAL routines send the QUERY MODE command to the FLASH (write 0x98 to address 0x55) the...
Altera_ForumHonored Contributor
Honored ContributorActually the Spec http://www.amd.com/us-en/assets/content_ty...ets/cfi_r20.pdf (http://www.amd.com/us-en/assets/content_type/downloadableassets/cfi_r20.pdf) is ambiguous, version 2.0 of the CFI specification states that the command to return to read array mode can be 0xFF or 0XF0. A quick fix for you is to change the value of the# define READ_ARRAY_MODE in the file altera_avalon_flash_table.c
