diff --git a/rtl/core/clint.v b/rtl/core/clint.v
index fca6af1..757f8fc 100644
--- a/rtl/core/clint.v
+++ b/rtl/core/clint.v
@@ -85,7 +85,7 @@ module clint(
         if (rst == `RstEnable) begin
             int_state = S_INT_IDLE;
         end else begin
-            if (inst_i == `INST_ECALL) begin
+            if (inst_i == `INST_ECALL || inst_i == `INST_EBREAK) begin
                 int_state = S_INT_SYNC_ASSERT;
             end else if (int_flag_i != `INT_NONE && global_int_en_i == `True) begin
                 int_state = S_INT_ASYNC_ASSERT;
@@ -107,10 +107,19 @@ module clint(
             case (csr_state)
                 S_CSR_IDLE: begin
                     if (int_state == S_INT_SYNC_ASSERT) begin
-                        // ecallÒì³£
-                        cause <= 32'd11;
                         csr_state <= S_CSR_MEPC;
                         inst_addr <= inst_addr_i;
+                        case (inst_i)
+                            `INST_ECALL: begin
+                                cause <= 32'd11;
+                            end
+                            `INST_EBREAK: begin
+                                cause <= 32'd3;
+                            end
+                            default: begin
+                                cause <= 32'd10;
+                            end
+                        endcase
                     end else if (int_state == S_INT_ASYNC_ASSERT) begin
                         // ¶¨Ê±Æ÷ÖжÏ
                         cause <= 32'h80000004;
diff --git a/rtl/core/defines.v b/rtl/core/defines.v
index fde4ba5..a9fcbbb 100644
--- a/rtl/core/defines.v
+++ b/rtl/core/defines.v
@@ -116,6 +116,7 @@
 
 `define INST_FENCE  7'b0001111
 `define INST_ECALL  32'h73
+`define INST_EBREAK 32'h00100073
 
 // J type inst
 `define INST_TYPE_B 7'b1100011