Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

menu "Memory Controler 2 timings"

        depends on OR32_GENERIC && OR32_GENERIC_MEMORY_TIMINGS

      #

      # FLASH timings: worst cases in ns, from data sheets

config OR32_FLASH_WA_TIME

        int "Flash Write Access Time [ns]"

        default 50

config OR32_FLASH_WE_DELAY

        int "Flash Write Enable Delay [ns]"

        default 0

config OR32_FLASH_WH_TIME

        int "Flash Write Hold Time [ns]"

        default 0

config OR32_FLASH_RA_TIME

        int "Flash Read Access Time [ns]"

        default 95

config OR32_FLASH_PRA_TIME

        int "Flash Page Read Access Time [ns]"

        default 25

config OR32_FLASH_RT_TIME

        int "Flash Read Turnaround Time [ns]"

        default 24

      #

      # SDRAM timings: worst cases in ns, from data sheets

config OR32_SDRAM_tRCD

        int "SDRAM tRCD [ns]"

        default 23

config OR32_SDRAM_tWR

        int "SDRAM tWR [ns]"

        default 20

config OR32_SDRAM_tRC

        int "SDRAM tRC [ns]"

        default 60

config OR32_SDRAM_tRFC

        int "SDRAM tRFC (sometimes the same as tRC) [ns]"

        default 60

config OR32_SDRAM_tRAS

        int "SDRAM tRAS (use the worst case minimal value) [ns]"

        default 50

config OR32_SDRAM_tRP

        int "SDRAM tRP [ns]"

        default 23

config OR32_SDRAM_tRRD

        int "SDRAM tRRD [ns]"

        default 15

      # 64000000 / 8192 = 7812.5

config OR32_SDRAM_tREF

        int "SDRAM tREF (round it up) [ns]"

        default 7813

endmenu