diff --git a/library/axi_ad9250/axi_ad9250.v b/library/axi_ad9250/axi_ad9250.v
index ad88dcf76..7f8093369 100755
--- a/library/axi_ad9250/axi_ad9250.v
+++ b/library/axi_ad9250/axi_ad9250.v
@@ -50,9 +50,12 @@ module axi_ad9250 (
   // dma interface
 
   adc_clk,
-  adc_dwr,
-  adc_ddata,
-  adc_dsync,
+  adc_valid_a,
+  adc_enable_a,
+  adc_data_a,
+  adc_valid_b,
+  adc_enable_b,
+  adc_data_b,
   adc_dovf,
   adc_dunf,
 
@@ -76,19 +79,14 @@ module axi_ad9250 (
   s_axi_rvalid,
   s_axi_rresp,
   s_axi_rdata,
-  s_axi_rready,
-
-  // debug signals
-
-  adc_mon_valid,
-  adc_mon_data);
+  s_axi_rready);
 
   parameter PCORE_ID = 0;
   parameter PCORE_DEVICE_TYPE = 0;
   parameter PCORE_IODELAY_GROUP = "adc_if_delay_group";
   parameter C_S_AXI_MIN_SIZE = 32'hffff;
-  parameter C_BASEADDR = 32'hffffffff;
-  parameter C_HIGHADDR = 32'h00000000;
+  parameter C_BASEADDR = 32'h00000000;
+  parameter C_HIGHADDR = 32'hffffffff;
 
   // jesd interface 
   // rx_clk is (line-rate/40)
@@ -99,9 +97,12 @@ module axi_ad9250 (
   // dma interface
 
   output          adc_clk;
-  output          adc_dwr;
-  output  [63:0]  adc_ddata;
-  output          adc_dsync;
+  output          adc_valid_a;
+  output          adc_enable_a;
+  output  [31:0]  adc_data_a;
+  output          adc_valid_b;
+  output          adc_enable_b;
+  output  [31:0]  adc_data_b;
   input           adc_dovf;
   input           adc_dunf;
 
@@ -127,20 +128,11 @@ module axi_ad9250 (
   output  [31:0]  s_axi_rdata;
   input           s_axi_rready;
 
-  // debug signals
-
-  output          adc_mon_valid;
-  output  [55:0]  adc_mon_data;
-
   // internal registers
 
-  reg             adc_data_cnt = 'd0;
-  reg             adc_dsync = 'd0;
-  reg             adc_dwr = 'd0;
-  reg     [63:0]  adc_ddata = 'd0;
-  reg             up_adc_status_pn_err = 'd0;
-  reg             up_adc_status_pn_oos = 'd0;
-  reg             up_adc_status_or = 'd0;
+  reg             up_status_pn_err = 'd0;
+  reg             up_status_pn_oos = 'd0;
+  reg             up_status_or = 'd0;
   reg     [31:0]  up_rdata = 'd0;
   reg             up_ack = 'd0;
 
@@ -157,22 +149,11 @@ module axi_ad9250 (
   wire            adc_or_a_s;
   wire            adc_or_b_s;
   wire            adc_status_s;
-  wire            adc_enable_a_s;
-  wire    [31:0]  adc_channel_data_a_s;
-  wire            adc_enable_b_s;
-  wire    [31:0]  adc_channel_data_b_s;
-  wire            up_adc_pn_err_a_s;
-  wire            up_adc_pn_oos_a_s;
-  wire            up_adc_or_a_s;
-  wire    [31:0]  up_adc_channel_rdata_a_s;
-  wire            up_adc_channel_ack_a_s;
-  wire            up_adc_pn_err_b_s;
-  wire            up_adc_pn_oos_b_s;
-  wire            up_adc_or_b_s;
-  wire    [31:0]  up_adc_channel_rdata_b_s;
-  wire            up_adc_channel_ack_b_s;
-  wire    [31:0]  up_adc_common_rdata_s;
-  wire            up_adc_common_ack_s;
+  wire    [ 1:0]  up_status_pn_err_s;
+  wire    [ 1:0]  up_status_pn_oos_s;
+  wire    [ 1:0]  up_status_or_s;
+  wire    [31:0]  up_rdata_s[0:2];
+  wire            up_ack_s[0:2];
   wire            up_sel_s;
   wire            up_wr_s;
   wire    [13:0]  up_addr_s;
@@ -183,59 +164,29 @@ module axi_ad9250 (
   assign up_clk = s_axi_aclk;
   assign up_rstn = s_axi_aresetn;
 
-  // monitor signals
-
-  assign adc_mon_valid = 1'b1;
-  assign adc_mon_data[ 27:  0] = adc_data_a_s;
-  assign adc_mon_data[ 55: 28] = adc_data_b_s;
-
-  // adc channels - dma interface
-
-  always @(posedge adc_clk) begin
-    adc_data_cnt <= ~adc_data_cnt;
-    case ({adc_enable_b_s, adc_enable_a_s})
-      2'b11: begin // both I and Q
-        adc_dsync <= 1'b1;
-        adc_dwr <= 1'b1;
-        adc_ddata <= {adc_channel_data_b_s[31:16], adc_channel_data_a_s[31:16],
-                      adc_channel_data_b_s[15: 0], adc_channel_data_a_s[15: 0]};
-      end
-      2'b10: begin // Q only
-        adc_dsync <= 1'b1;
-        adc_dwr <= adc_data_cnt;
-        adc_ddata <= {adc_channel_data_b_s, adc_ddata[63:32]};
-      end
-      2'b01: begin // I only
-        adc_dsync <= 1'b1;
-        adc_dwr <= adc_data_cnt;
-        adc_ddata <= {adc_channel_data_a_s, adc_ddata[63:32]};
-      end
-      default: begin // no channels
-        adc_dsync <= 1'b1;
-        adc_dwr <= 1'b1;
-        adc_ddata <= {4{16'hdead}};
-      end
-    endcase
-  end
-
   // processor read interface
 
   always @(negedge up_rstn or posedge up_clk) begin
     if (up_rstn == 0) begin
-      up_adc_status_pn_err <= 'd0;
-      up_adc_status_pn_oos <= 'd0;
-      up_adc_status_or <= 'd0;
+      up_status_pn_err <= 'd0;
+      up_status_pn_oos <= 'd0;
+      up_status_or <= 'd0;
       up_rdata <= 'd0;
       up_ack <= 'd0;
     end else begin
-      up_adc_status_pn_err <= up_adc_pn_err_a_s | up_adc_pn_err_b_s;
-      up_adc_status_pn_oos <= up_adc_pn_oos_a_s | up_adc_pn_oos_b_s;
-      up_adc_status_or <= up_adc_or_a_s | up_adc_or_b_s;
-      up_rdata <= up_adc_common_rdata_s | up_adc_channel_rdata_a_s | up_adc_channel_rdata_b_s;
-      up_ack <= up_adc_common_ack_s | up_adc_channel_ack_a_s | up_adc_channel_ack_b_s;
+      up_status_pn_err <= | up_status_pn_err_s;
+      up_status_pn_oos <= | up_status_pn_oos_s;
+      up_status_or <= | up_status_or_s;
+      up_rdata <= up_rdata_s[0] | up_rdata_s[1] | up_rdata_s[2];
+      up_ack <= up_ack_s[0] | up_ack_s[1] | up_ack_s[2];
     end
   end
 
+  // adc valid
+
+  assign adc_valid_a = 1'b1;
+  assign adc_valid_b = 1'b1;
+
   // main (device interface)
 
   axi_ad9250_if i_if (
@@ -256,19 +207,19 @@ module axi_ad9250 (
     .adc_rst (adc_rst),
     .adc_data (adc_data_a_s),
     .adc_or (adc_or_a_s),
-    .adc_dfmt_data (adc_channel_data_a_s),
-    .adc_enable (adc_enable_a_s),
-    .up_adc_pn_err (up_adc_pn_err_a_s),
-    .up_adc_pn_oos (up_adc_pn_oos_a_s),
-    .up_adc_or (up_adc_or_a_s),
+    .adc_dfmt_data (adc_data_a),
+    .adc_enable (adc_enable_a),
+    .up_adc_pn_err (up_status_pn_err_s[0]),
+    .up_adc_pn_oos (up_status_pn_oos_s[0]),
+    .up_adc_or (up_status_or_s[0]),
     .up_rstn (up_rstn),
     .up_clk (up_clk),
     .up_sel (up_sel_s),
     .up_wr (up_wr_s),
     .up_addr (up_addr_s),
     .up_wdata (up_wdata_s),
-    .up_rdata (up_adc_channel_rdata_a_s),
-    .up_ack (up_adc_channel_ack_a_s));
+    .up_rdata (up_rdata_s[0]),
+    .up_ack (up_ack_s[0]));
 
   // channel
 
@@ -277,19 +228,19 @@ module axi_ad9250 (
     .adc_rst (adc_rst),
     .adc_data (adc_data_b_s),
     .adc_or (adc_or_b_s),
-    .adc_dfmt_data (adc_channel_data_b_s),
-    .adc_enable (adc_enable_b_s),
-    .up_adc_pn_err (up_adc_pn_err_b_s),
-    .up_adc_pn_oos (up_adc_pn_oos_b_s),
-    .up_adc_or (up_adc_or_b_s),
+    .adc_dfmt_data (adc_data_b),
+    .adc_enable (adc_enable_b),
+    .up_adc_pn_err (up_status_pn_err_s[1]),
+    .up_adc_pn_oos (up_status_pn_oos_s[1]),
+    .up_adc_or (up_status_or_s[1]),
     .up_rstn (up_rstn),
     .up_clk (up_clk),
     .up_sel (up_sel_s),
     .up_wr (up_wr_s),
     .up_addr (up_addr_s),
     .up_wdata (up_wdata_s),
-    .up_rdata (up_adc_channel_rdata_b_s),
-    .up_ack (up_adc_channel_ack_b_s));
+    .up_rdata (up_rdata_s[1]),
+    .up_ack (up_ack_s[1]));
 
   // common processor control
 
@@ -301,12 +252,12 @@ module axi_ad9250 (
     .adc_ddr_edgesel (),
     .adc_pin_mode (),
     .adc_status (adc_status_s),
-    .adc_status_pn_err (up_adc_status_pn_err),
-    .adc_status_pn_oos (up_adc_status_pn_oos),
-    .adc_status_or (up_adc_status_or),
     .adc_status_ovf (adc_dovf),
     .adc_status_unf (adc_dunf),
     .adc_clk_ratio (32'd1),
+    .up_status_pn_err (up_status_pn_err),
+    .up_status_pn_oos (up_status_pn_oos),
+    .up_status_or (up_status_or),
     .delay_clk (1'b0),
     .delay_rst (),
     .delay_sel (),
@@ -333,8 +284,8 @@ module axi_ad9250 (
     .up_wr (up_wr_s),
     .up_addr (up_addr_s),
     .up_wdata (up_wdata_s),
-    .up_rdata (up_adc_common_rdata_s),
-    .up_ack (up_adc_common_ack_s));
+    .up_rdata (up_rdata_s[2]),
+    .up_ack (up_ack_s[2]));
 
   // up bus interface
 
diff --git a/library/axi_ad9250/axi_ad9250_alt.v b/library/axi_ad9250/axi_ad9250_alt.v
index 95f8c3411..87f8297ab 100755
--- a/library/axi_ad9250/axi_ad9250_alt.v
+++ b/library/axi_ad9250/axi_ad9250_alt.v
@@ -50,9 +50,12 @@ module axi_ad9250_alt (
   // dma interface
 
   adc_clk,
-  adc_dwr,
-  adc_ddata,
-  adc_dsync,
+  adc_valid_a,
+  adc_enable_a,
+  adc_data_a,
+  adc_valid_b,
+  adc_enable_b,
+  adc_data_b,
   adc_dovf,
   adc_dunf,
 
@@ -94,12 +97,7 @@ module axi_ad9250_alt (
   s_axi_rdata,
   s_axi_rid,
   s_axi_rlast,
-  s_axi_rready,
-
-  // debug signals
-
-  adc_mon_valid,
-  adc_mon_data);
+  s_axi_rready);
 
   parameter PCORE_ID = 0;
   parameter PCORE_AXI_ID_WIDTH = 3;
@@ -114,9 +112,12 @@ module axi_ad9250_alt (
   // dma interface
 
   output                              adc_clk;
-  output                              adc_dwr;
-  output  [63:0]                      adc_ddata;
-  output                              adc_dsync;
+  output                              adc_valid_a;
+  output                              adc_enable_a;
+  output  [31:0]                      adc_data_a;
+  output                              adc_valid_b;
+  output                              adc_enable_b;
+  output  [31:0]                      adc_data_b;
   input                               adc_dovf;
   input                               adc_dunf;
 
@@ -160,11 +161,6 @@ module axi_ad9250_alt (
   output                              s_axi_rlast;
   input                               s_axi_rready;
 
-  // debug signals
-
-  output                              adc_mon_valid;
-  output [119:0]                      adc_mon_data;
-
   // defaults
 
   assign s_axi_bid = 'd0;
@@ -184,9 +180,12 @@ module axi_ad9250_alt (
     .rx_clk (rx_clk),
     .rx_data (rx_data),
     .adc_clk (adc_clk),
-    .adc_dwr (adc_dwr),
-    .adc_ddata (adc_ddata),
-    .adc_dsync (adc_dsync),
+    .adc_valid_a (adc_valid_a),
+    .adc_enable_a (adc_enable_a),
+    .adc_data_a (adc_data_a),
+    .adc_valid_b (adc_valid_b),
+    .adc_enable_b (adc_enable_b),
+    .adc_data_b (adc_data_b),
     .adc_dovf (adc_dovf),
     .adc_dunf (adc_dunf),
     .s_axi_aclk (s_axi_aclk),
@@ -207,9 +206,7 @@ module axi_ad9250_alt (
     .s_axi_rvalid (s_axi_rvalid),
     .s_axi_rresp (s_axi_rresp),
     .s_axi_rdata (s_axi_rdata),
-    .s_axi_rready (s_axi_rready),
-    .adc_mon_valid (adc_mon_valid),
-    .adc_mon_data (adc_mon_data));
+    .s_axi_rready (s_axi_rready));
 
 endmodule
 
diff --git a/library/axi_ad9250/axi_ad9250_channel.v b/library/axi_ad9250/axi_ad9250_channel.v
index 78ce1b1a1..3f1f92893 100755
--- a/library/axi_ad9250/axi_ad9250_channel.v
+++ b/library/axi_ad9250/axi_ad9250_channel.v
@@ -103,7 +103,7 @@ module axi_ad9250_channel (
 
   wire            adc_pn_oos_s;
   wire            adc_pn_err_s;
-  wire            adc_pn_type_s;
+  wire    [ 3:0]  adc_pnseq_sel_s;
   wire            adc_dfmt_enable_s;
   wire            adc_dfmt_type_s;
   wire            adc_dfmt_se_s;
@@ -115,7 +115,7 @@ module axi_ad9250_channel (
     .adc_data (adc_data),
     .adc_pn_oos (adc_pn_oos_s),
     .adc_pn_err (adc_pn_err_s),
-    .adc_pn_type (adc_pn_type_s));
+    .adc_pnseq_sel (adc_pnseq_sel_s));
 
   genvar n;
   generate
@@ -136,17 +136,17 @@ module axi_ad9250_channel (
     .adc_clk (adc_clk),
     .adc_rst (adc_rst),
     .adc_enable (adc_enable),
-    .adc_pn_sel (),
     .adc_iqcor_enb (),
     .adc_dcfilt_enb (),
     .adc_dfmt_se (adc_dfmt_se_s),
     .adc_dfmt_type (adc_dfmt_type_s),
     .adc_dfmt_enable (adc_dfmt_enable_s),
-    .adc_pn_type (adc_pn_type_s),
     .adc_dcfilt_offset (),
     .adc_dcfilt_coeff (),
     .adc_iqcor_coeff_1 (),
     .adc_iqcor_coeff_2 (),
+    .adc_pnseq_sel (adc_pnseq_sel_s),
+    .adc_data_sel (),
     .adc_pn_err (adc_pn_err_s),
     .adc_pn_oos (adc_pn_oos_s),
     .adc_or (adc_or),
diff --git a/library/axi_ad9250/axi_ad9250_hw.tcl b/library/axi_ad9250/axi_ad9250_hw.tcl
index 04466c3cf..e4b15667a 100755
--- a/library/axi_ad9250/axi_ad9250_hw.tcl
+++ b/library/axi_ad9250/axi_ad9250_hw.tcl
@@ -13,6 +13,7 @@ set_module_property DISPLAY_NAME axi_ad9250
 add_fileset quartus_synth QUARTUS_SYNTH "" "Quartus Synthesis"
 set_fileset_property quartus_synth TOP_LEVEL axi_ad9250_alt
 add_fileset_file ad_rst.v             VERILOG PATH $ad_hdl_dir/library/common/altera/ad_rst.v
+add_fileset_file ad_pnmon.v           VERILOG PATH $ad_hdl_dir/library/common/ad_pnmon.v
 add_fileset_file ad_datafmt.v         VERILOG PATH $ad_hdl_dir/library/common/ad_datafmt.v
 add_fileset_file up_axi.v             VERILOG PATH $ad_hdl_dir/library/common/up_axi.v
 add_fileset_file up_xfer_cntrl.v      VERILOG PATH $ad_hdl_dir/library/common/up_xfer_cntrl.v
@@ -116,16 +117,12 @@ add_interface_port adc_clock adc_clk clk Output 1
 
 add_interface adc_dma_if conduit end
 set_interface_property adc_dma_if associatedClock adc_clock
-add_interface_port adc_dma_if adc_ddata ddata Output 64
-add_interface_port adc_dma_if adc_dsync dsync Output 1
-add_interface_port adc_dma_if adc_dovf dovf Input 1
-add_interface_port adc_dma_if adc_dunf dunf Input 1
-add_interface_port adc_dma_if adc_dwr dwr Output 1
-
-# signal tap
-
-add_interface adc_mon_if conduit end
-set_interface_property adc_mon_if associatedClock adc_clock
-add_interface_port adc_mon_if adc_mon_valid valid Output 1
-add_interface_port adc_mon_if adc_mon_data data Output 56
+add_interface_port adc_dma_if adc_valid_a adc_valid_a Output 1
+add_interface_port adc_dma_if adc_enable_a adc_enable_a Output 1
+add_interface_port adc_dma_if adc_data_a adc_data_a Output 32
+add_interface_port adc_dma_if adc_valid_b adc_valid_b Output 1
+add_interface_port adc_dma_if adc_enable_b adc_enable_b Output 1
+add_interface_port adc_dma_if adc_data_b adc_data_b Output 32
+add_interface_port adc_dma_if adc_dovf adc_dovf Input 1
+add_interface_port adc_dma_if adc_dunf adc_dunf Input 1
 
diff --git a/library/axi_ad9250/axi_ad9250_if.v b/library/axi_ad9250/axi_ad9250_if.v
index 6d1cd1fbd..845f85e5c 100755
--- a/library/axi_ad9250/axi_ad9250_if.v
+++ b/library/axi_ad9250/axi_ad9250_if.v
@@ -94,14 +94,12 @@ module axi_ad9250_if (
   // adc channels
 
   assign adc_data_a = {adc_data_a_s1_s[13:0], adc_data_a_s0_s[13:0]};
-
   assign adc_data_b = {adc_data_b_s1_s[13:0], adc_data_b_s0_s[13:0]};
 
   // data multiplex
 
   assign adc_data_a_s1_s = {rx_data[25:24], rx_data[23:16], rx_data[31:26]}; 
   assign adc_data_a_s0_s = {rx_data[ 9: 8], rx_data[ 7: 0], rx_data[15:10]};
-
   assign adc_data_b_s1_s = {rx_data[57:56], rx_data[55:48], rx_data[63:58]}; 
   assign adc_data_b_s0_s = {rx_data[41:40], rx_data[39:32], rx_data[47:42]};
 
diff --git a/library/axi_ad9250/axi_ad9250_ip.tcl b/library/axi_ad9250/axi_ad9250_ip.tcl
index 588d2ab43..e490d7a56 100755
--- a/library/axi_ad9250/axi_ad9250_ip.tcl
+++ b/library/axi_ad9250/axi_ad9250_ip.tcl
@@ -6,6 +6,7 @@ source $ad_hdl_dir/library/scripts/adi_ip.tcl
 adi_ip_create axi_ad9250
 adi_ip_files axi_ad9250 [list \
   "$ad_hdl_dir/library/common/ad_rst.v" \
+  "$ad_hdl_dir/library/common/ad_pnmon.v" \
   "$ad_hdl_dir/library/common/ad_datafmt.v" \
   "$ad_hdl_dir/library/common/up_axi.v" \
   "$ad_hdl_dir/library/common/up_xfer_cntrl.v" \
diff --git a/library/axi_ad9250/axi_ad9250_pnmon.v b/library/axi_ad9250/axi_ad9250_pnmon.v
index 701b41de3..aba8e6061 100755
--- a/library/axi_ad9250/axi_ad9250_pnmon.v
+++ b/library/axi_ad9250/axi_ad9250_pnmon.v
@@ -52,9 +52,9 @@ module axi_ad9250_pnmon (
   adc_pn_oos,
   adc_pn_err,
 
-  // processor interface PN9 (0x0), PN23 (0x1)
+  // processor interface
 
-  adc_pn_type);
+  adc_pnseq_sel);
 
   // adc interface
 
@@ -68,28 +68,16 @@ module axi_ad9250_pnmon (
 
   // processor interface PN9 (0x0), PN23 (0x1)
 
-  input           adc_pn_type;
+  input   [ 3:0]  adc_pnseq_sel;
 
   // internal registers
 
-  reg     [27:0]  adc_pn_data = 'd0;
-  reg             adc_pn_match_d_1 = 'd0;
-  reg             adc_pn_match_d_0 = 'd0;
-  reg             adc_pn_match_z = 'd0;
-  reg             adc_pn_err = 'd0;
-  reg     [ 6:0]  adc_pn_oos_count = 'd0;
-  reg             adc_pn_oos = 'd0;
+  reg     [27:0]  adc_pn_data_in = 'd0;
+  reg     [27:0]  adc_pn_data_pn = 'd0;
 
   // internal signals
 
-  wire    [27:0]  adc_pn_data_in_s;
-  wire            adc_pn_match_d_1_s;
-  wire            adc_pn_match_d_0_s;
-  wire            adc_pn_match_z_s;
-  wire            adc_pn_match_s;
-  wire    [27:0]  adc_pn_data_s;
-  wire            adc_pn_update_s;
-  wire            adc_pn_err_s;
+  wire    [27:0]  adc_pn_data_pn_s;
 
   // PN23 function
 
@@ -167,55 +155,28 @@ module axi_ad9250_pnmon (
     end
   endfunction
 
-  // pn sequence checking algorithm is commonly used in most applications.
-  // if oos is asserted (pn is out of sync):
-  //    the next sequence is generated from the incoming data.
-  //    if 16 sequences match consecutively, oos is cleared (de-asserted).
-  // if oos is de-asserted (pn is in sync)
-  //    the next sequence is generated from the current sequence.
-  //    if 64 sequences mismatch consecutively, oos is set (asserted).
-  // if oos is de-asserted, any spurious mismatches sets the error register.
-  // ideally, processor should make sure both oos == 0x0 and err == 0x0.
+  // pn sequence select
 
-  assign adc_pn_data_in_s = {~adc_data[13], adc_data[12:0], ~adc_data[27], adc_data[26:14]};
-  assign adc_pn_match_d_1_s = (adc_pn_data_in_s[27:14] == adc_pn_data[27:14]) ? 1'b1 : 1'b0;
-  assign adc_pn_match_d_0_s = (adc_pn_data_in_s[13: 0] == adc_pn_data[13: 0]) ? 1'b1 : 1'b0;
-  assign adc_pn_match_z_s = (adc_pn_data_in_s == 28'd0) ? 1'b0 : 1'b1;
-  assign adc_pn_match_s = adc_pn_match_d_1 & adc_pn_match_d_0 & adc_pn_match_z;
-  assign adc_pn_data_s = (adc_pn_oos == 1'b1) ? adc_pn_data_in_s : adc_pn_data;
-  assign adc_pn_update_s = ~(adc_pn_oos ^ adc_pn_match_s);
-  assign adc_pn_err_s = ~(adc_pn_oos | adc_pn_match_s);
-
-  // pn running sequence
+  assign adc_pn_data_pn_s = (adc_pn_oos == 1'b1) ? adc_pn_data_in : adc_pn_data_pn;
 
   always @(posedge adc_clk) begin
-    if (adc_pn_type == 1'b0) begin
-      adc_pn_data <= pn9(adc_pn_data_s);
+    adc_pn_data_in <= {~adc_data[13], adc_data[12:0], ~adc_data[27], adc_data[26:14]};
+    if (adc_pnseq_sel == 4'd0) begin
+      adc_pn_data_pn <= pn9(adc_pn_data_pn_s);
     end else begin
-      adc_pn_data <= pn23(adc_pn_data_s);
+      adc_pn_data_pn <= pn23(adc_pn_data_pn_s);
     end
   end
 
-  // pn oos and counters (64 to clear and set).
+  // pn oos & pn err
 
-  always @(posedge adc_clk) begin
-    adc_pn_match_d_1 <= adc_pn_match_d_1_s;
-    adc_pn_match_d_0 <= adc_pn_match_d_0_s;
-    adc_pn_match_z <= adc_pn_match_z_s;
-    adc_pn_err <= adc_pn_err_s;
-    if (adc_pn_update_s == 1'b1) begin
-      if (adc_pn_oos_count >= 16) begin
-        adc_pn_oos_count <= 'd0;
-        adc_pn_oos <= ~adc_pn_oos;
-      end else begin
-        adc_pn_oos_count <= adc_pn_oos_count + 1'b1;
-        adc_pn_oos <= adc_pn_oos;
-      end
-    end else begin
-      adc_pn_oos_count <= 'd0;
-      adc_pn_oos <= adc_pn_oos;
-    end
-  end
+  ad_pnmon #(.DATA_WIDTH(28)) i_pnmon (
+    .adc_clk (adc_clk),
+    .adc_valid_in (1'b1),
+    .adc_data_in (adc_pn_data_in),
+    .adc_data_pn (adc_pn_data_pn),
+    .adc_pn_oos (adc_pn_oos),
+    .adc_pn_err (adc_pn_err));
 
 endmodule