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https://github.com/YosysHQ/yosys
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101 lines
2 KiB
Plaintext
101 lines
2 KiB
Plaintext
bram $__ICE40_RAM4K_M0
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init 1
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abits 8
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dbits 16
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groups 2
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ports 1 1
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wrmode 0 1
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enable 1 16
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transp 0 0
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clocks 2 3
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clkpol 2 3
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endbram
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bram $__ICE40_RAM4K_M123
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init 1
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abits 9 @M1
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dbits 8 @M1
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abits 10 @M2
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dbits 4 @M2
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abits 11 @M3
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dbits 2 @M3
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groups 2
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ports 1 1
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wrmode 0 1
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enable 1 1
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transp 0 0
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clocks 2 3
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clkpol 2 3
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endbram
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# The syn_* attributes are described in:
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# https://www.latticesemi.com/-/media/LatticeSemi/Documents/Tutorials/AK/LatticeDiamondTutorial311.ashx
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attr_icase 1
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match $__ICE40_RAM4K_M0
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# implicitly requested RAM or ROM
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attribute !syn_ramstyle syn_ramstyle=auto
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attribute !syn_romstyle syn_romstyle=auto
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attribute !ram_block
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attribute !rom_block
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attribute !logic_block
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min efficiency 2
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make_transp
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or_next_if_better
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endmatch
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match $__ICE40_RAM4K_M0
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# explicitly requested RAM
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attribute syn_ramstyle=block_ram ram_block
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attribute !syn_romstyle
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attribute !rom_block
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attribute !logic_block
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min wports 1
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make_transp
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or_next_if_better
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endmatch
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match $__ICE40_RAM4K_M0
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# explicitly requested ROM
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attribute syn_romstyle=ebr rom_block
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attribute !syn_ramstyle
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attribute !ram_block
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attribute !logic_block
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max wports 0
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make_transp
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or_next_if_better
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endmatch
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match $__ICE40_RAM4K_M123
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# implicitly requested RAM or ROM
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attribute !syn_ramstyle syn_ramstyle=auto
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attribute !syn_romstyle syn_romstyle=auto
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attribute !ram_block
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attribute !rom_block
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attribute !logic_block
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min efficiency 2
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make_transp
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or_next_if_better
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endmatch
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match $__ICE40_RAM4K_M123
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# explicitly requested RAM
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attribute syn_ramstyle=block_ram ram_block
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attribute !syn_romstyle
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attribute !rom_block
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attribute !logic_block
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min wports 1
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make_transp
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or_next_if_better
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endmatch
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match $__ICE40_RAM4K_M123
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# explicitly requested ROM
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attribute syn_romstyle=ebr rom_block
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attribute !syn_ramstyle
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attribute !ram_block
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attribute !logic_block
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max wports 0
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make_transp
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endmatch
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