techlibs/ecp5/brams.txt

   1 bram $__ECP5_PDPW16KD
   2   init 1
   3
   4   abits 9
   5   dbits 36
   6
   7   groups 2
   8   ports 1 1
   9   wrmode 1 0
  10   enable 4 1
  11   transp 0 0
  12   clocks 2 3
  13   clkpol 2 3
  14 endbram
  15
  16 bram $__ECP5_DP16KD
  17   init 1
  18
  19   abits 10 @a10d18
  20   dbits 18 @a10d18
  21   abits 11 @a11d9
  22   dbits 9  @a11d9
  23   abits 12 @a12d4
  24   dbits 4  @a12d4
  25   abits 13 @a13d2
  26   dbits 2  @a13d2
  27   abits 14 @a14d1
  28   dbits 1  @a14d1
  29
  30   groups 2
  31   ports 1 1
  32   wrmode 1 0
  33   enable 2 1 @a10d18
  34   enable 1 1 @a11d9 @a12d4 @a13d2 @a14d1
  35   transp 0 2
  36   clocks 2 3
  37   clkpol 2 3
  38 endbram
  39
  40 # The syn_* attributes are described in:
  41 # https://www.latticesemi.com/-/media/LatticeSemi/Documents/Tutorials/AK/LatticeDiamondTutorial311.ashx
  42 attr_icase 1
  43
  44 match $__ECP5_PDPW16KD
  45   # implicitly requested RAM or ROM
  46   attribute !syn_ramstyle syn_ramstyle=auto
  47   attribute !syn_romstyle syn_romstyle=auto
  48   attribute !ram_block
  49   attribute !rom_block
  50   attribute !logic_block
  51   min bits 2048
  52   min efficiency 5
  53   shuffle_enable A
  54   make_transp
  55   or_next_if_better
  56 endmatch
  57
  58 match $__ECP5_PDPW16KD
  59   # explicitly requested RAM
  60   attribute syn_ramstyle=block_ram ram_block
  61   attribute !syn_romstyle
  62   attribute !rom_block
  63   attribute !logic_block
  64   min wports 1
  65   shuffle_enable A
  66   make_transp
  67   or_next_if_better
  68 endmatch
  69
  70 match $__ECP5_PDPW16KD
  71   # explicitly requested ROM
  72   attribute syn_romstyle=ebr rom_block
  73   attribute !syn_ramstyle
  74   attribute !ram_block
  75   attribute !logic_block
  76   max wports 0
  77   shuffle_enable A
  78   make_transp
  79   or_next_if_better
  80 endmatch
  81
  82 match $__ECP5_DP16KD
  83   # implicitly requested RAM or ROM
  84   attribute !syn_ramstyle syn_ramstyle=auto
  85   attribute !syn_romstyle syn_romstyle=auto
  86   attribute !ram_block
  87   attribute !rom_block
  88   attribute !logic_block
  89   min bits 2048
  90   min efficiency 5
  91   shuffle_enable A
  92   or_next_if_better
  93 endmatch
  94
  95 match $__ECP5_DP16KD
  96   # explicitly requested RAM
  97   attribute syn_ramstyle=block_ram ram_block
  98   attribute !syn_romstyle
  99   attribute !rom_block
 100   attribute !logic_block
 101   min wports 1
 102   shuffle_enable A
 103   or_next_if_better
 104 endmatch
 105
 106 match $__ECP5_DP16KD
 107   # explicitly requested ROM
 108   attribute syn_romstyle=ebr rom_block
 109   attribute !syn_ramstyle
 110   attribute !ram_block
 111   attribute !logic_block
 112   max wports 0
 113   shuffle_enable A
 114 endmatch