yosys/techlibs/gowin/brams.txt

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ram block $__GOWIN_SP_ {
abits 14;
widths 1 2 4 9 18 36 per_port;
cost 128;
init no_undef;
port srsw "A" {
clock posedge;
clken;
option "RESET_MODE" "SYNC" {
rdsrst zero ungated;
}
option "RESET_MODE" "ASYNC" {
rdarst zero;
}
rdinit zero;
portoption "WRITE_MODE" 0 {
rdwr no_change;
}
portoption "WRITE_MODE" 1 {
rdwr new;
}
portoption "WRITE_MODE" 2 {
rdwr old;
}
}
}
ram block $__GOWIN_DP_ {
abits 14;
widths 1 2 4 9 18 per_port;
cost 128;
init no_undef;
port srsw "A" "B" {
clock posedge;
clken;
option "RESET_MODE" "SYNC" {
rdsrst zero ungated;
}
option "RESET_MODE" "ASYNC" {
rdarst zero;
}
rdinit zero;
portoption "WRITE_MODE" 0 {
rdwr no_change;
}
portoption "WRITE_MODE" 1 {
rdwr new;
}
portoption "WRITE_MODE" 2 {
rdwr old;
}
}
}
ram block $__GOWIN_SDP_ {
abits 14;
widths 1 2 4 9 18 36 per_port;
cost 128;
init no_undef;
port sr "R" {
clock posedge;
clken;
option "RESET_MODE" "SYNC" {
rdsrst zero ungated;
}
option "RESET_MODE" "ASYNC" {
rdarst zero;
}
rdinit zero;
}
port sw "W" {
clock posedge;
clken;
}
}