reset synchronizer

1 files changed, 22 insertions, 0 deletions

diff --git a/src/reset_synchronizer.v b/src/reset_synchronizer.v
new file mode 100644
index 0000000..b957a4b
--- /dev/null
+++ b/src/reset_synchronizer.v
@@ -0,0 +1,22 @@
+module reset_synchronizer (
+    input clk,
+    input rstn_async,
+    output rstn
+);
+
+reg rstn_meta;
+reg rstn_sync_reg;
+
+always @(posedge clk or negedge rstn_async) begin
+  if (!rstn_async) begin
+    rstn_meta <= 1'b0;
+    rstn_sync_reg <= 1'b0;
+  end else begin
+    rstn_meta <= 1'b1;
+    rstn_sync_reg <= rstn_meta;
+  end
+end
+
+assign rstn = rstn_sync_reg;
+
+endmodule
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