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-rw-r--r--techlibs/ice40/synth_ice40.cc4
1 files changed, 3 insertions, 1 deletions
diff --git a/techlibs/ice40/synth_ice40.cc b/techlibs/ice40/synth_ice40.cc
index 59ada8bae..463e80ee2 100644
--- a/techlibs/ice40/synth_ice40.cc
+++ b/techlibs/ice40/synth_ice40.cc
@@ -319,7 +319,9 @@ struct SynthIce40Pass : public ScriptPass
if (check_label("map_ffram"))
{
run("opt -fast -mux_undef -undriven -fine");
- run("memory_map");
+ run("memory_map -iattr -attr !ram_block -attr !rom_block -attr logic_block "
+ "-attr syn_ramstyle=auto -attr syn_ramstyle=registers "
+ "-attr syn_romstyle=auto -attr syn_romstyle=logic");
run("opt -undriven -fine");
}