diff --git a/ice40hx8k-b-evn.pcf b/ice40hx8k-b-evn.pcf
index 53bf5cc..20ce27e 100644
--- a/ice40hx8k-b-evn.pcf
+++ b/ice40hx8k-b-evn.pcf
@@ -1 +1,15 @@
-set_io clk J3
+set_io clk       J3
+set_io flash_clk R11
+set_io flash_csn R12
+set_io flash_io0 P12
+set_io flash_io1 P11
+set_io leds[0]   C3
+set_io leds[1]   B3
+set_io leds[2]   C4
+set_io leds[3]   C5
+set_io leds[4]   A1
+set_io leds[5]   A2
+set_io leds[6]   B4
+set_io leds[7]   B5
+set_io uart_rx   B10
+set_io uart_tx   B12
diff --git a/top.sv b/top.sv
index c298af2..2ff3207 100644
--- a/top.sv
+++ b/top.sv
@@ -1,8 +1,38 @@
 `include "rv32.sv"
 
 module top (
-    input clk
+    input clk,
+
+    /* serial flash */
+    output flash_clk,
+    output flash_csn,
+    inout flash_io0,
+    inout flash_io1,
+
+    /* LEDs */
+    output [7:0] leds,
+
+    /* UART */
+    input uart_rx,
+    output uart_tx
 );
+    logic flash_io0_en;
+    logic flash_io0_in;
+    logic flash_io0_out;
+
+    logic flash_io1_en;
+    logic flash_io1_in;
+    logic flash_io1_out;
+
+    SB_IO #(
+        .PIN_TYPE(6'b1010_01),
+    ) flash_io [1:0] (
+        .PACKAGE_PIN({flash_io1, flash_io0}),
+        .OUTPUT_ENABLE({flash_io1_en, flash_io0_en}),
+        .D_IN_0({flash_io1_in, flash_io0_in}),
+        .D_OUT_0({flash_io1_out, flash_io0_out})
+    );
+
     rv32 rv32 (
         .clk(clk)
     );