diff --git a/projects/ad719x_asdz/de10nano/system_top.v b/projects/ad719x_asdz/de10nano/system_top.v
index 94d34602a9..9937efa1ca 100755
--- a/projects/ad719x_asdz/de10nano/system_top.v
+++ b/projects/ad719x_asdz/de10nano/system_top.v
@@ -122,14 +122,9 @@ module system_top (
   input            ad719x_spi_miso,
   output           ad719x_spi_mosi,
   output           ad719x_spi_sclk,
-  output           ad719x_spi_cs,
+  output           ad719x_spi_cs_1,
 
-  output           ad719x_sync_n,
-
-  output           ltc2308_cs,
-  output           ltc2308_sclk,
-  output           ltc2308_mosi,
-  input            ltc2308_miso
+  output           ad719x_sync_n
 );
 
   // internal signals
@@ -155,14 +150,12 @@ module system_top (
 
   // GPIO outputs
 
-  assign ltc2308_cs = gpio_o[33];
-  assign ad719x_sync_n = gpio_o[32];
-
+  assign ad719x_sync_n = gpio_o[33];
   assign gpio_bd_o[7:0] = gpio_o[7:0];
 
   // GPIO inputs
 
-  assign gpio_i[34] = ad719x_spi_miso;
+  assign gpio_i[32] = ad719x_spi_miso;
   assign gpio_i[31:14] = gpio_o[31:14];
   assign gpio_i[13:8] = gpio_bd_i[5:0];
 
@@ -266,11 +259,7 @@ module system_top (
     .sys_spi_MISO (ad719x_spi_miso),
     .sys_spi_MOSI (ad719x_spi_mosi),
     .sys_spi_SCLK (ad719x_spi_sclk),
-    .sys_spi_SS_n (ad719x_spi_cs),
-    .ltc2308_spi_MISO (ltc2308_miso),
-    .ltc2308_spi_MOSI (ltc2308_mosi),
-    .ltc2308_spi_SCLK (ltc2308_sclk),
-    .ltc2308_spi_SS_n (),
+    .sys_spi_SS_n (ad719x_spi_cs_1),
     .axi_hdmi_tx_0_hdmi_if_h_clk (hdmi_out_clk),
     .axi_hdmi_tx_0_hdmi_if_h24_hsync (hdmi_hsync),
     .axi_hdmi_tx_0_hdmi_if_h24_vsync (hdmi_vsync),