diff --git a/fuzzers/005-tilegrid/Makefile b/fuzzers/005-tilegrid/Makefile
index fc2b3c5d..c587aa0b 100644
--- a/fuzzers/005-tilegrid/Makefile
+++ b/fuzzers/005-tilegrid/Makefile
@@ -9,6 +9,7 @@ TILEGRID_TDB_DEPENDENCIES += bram_block/build/segbits_tilegrid.tdb
 TILEGRID_TDB_DEPENDENCIES += bram_int/build/segbits_tilegrid.tdb
 TILEGRID_TDB_DEPENDENCIES += clb/build/segbits_tilegrid.tdb
 TILEGRID_TDB_DEPENDENCIES += clb_int/build/segbits_tilegrid.tdb
+TILEGRID_TDB_DEPENDENCIES += cfg/build/segbits_tilegrid.tdb
 TILEGRID_TDB_DEPENDENCIES += dsp/build/segbits_tilegrid.tdb
 TILEGRID_TDB_DEPENDENCIES += fifo_int/build/segbits_tilegrid.tdb
 TILEGRID_TDB_DEPENDENCIES += cfg_int/build/segbits_tilegrid.tdb
@@ -54,6 +55,9 @@ clb/build/segbits_tilegrid.tdb: build/basicdb/tilegrid.json
 clb_int/build/segbits_tilegrid.tdb: build/basicdb/tilegrid.json
 	cd clb_int && $(MAKE)
 
+cfg/build/segbits_tilegrid.tdb: build/basicdb/tilegrid.json
+	cd cfg && $(MAKE)
+
 iob/build/segbits_tilegrid.tdb: build/basicdb/tilegrid.json
 	cd iob && $(MAKE)
 
@@ -126,6 +130,7 @@ clean:
 	rm -rf build run.ok
 	cd clb && $(MAKE) clean
 	cd clb_int && $(MAKE) clean
+	cd cfg && $(MAKE) clean
 	cd iob && $(MAKE) clean
 	cd iob_int && $(MAKE) clean
 	cd mmcm && $(MAKE) clean
diff --git a/fuzzers/005-tilegrid/add_tdb.py b/fuzzers/005-tilegrid/add_tdb.py
index f5b32147..316db698 100644
--- a/fuzzers/005-tilegrid/add_tdb.py
+++ b/fuzzers/005-tilegrid/add_tdb.py
@@ -83,6 +83,7 @@ def run(fn_in, fn_out, verbose=False):
         ("bram/build/segbits_tilegrid.tdb", 28, 10),
         ("bram_block/build/segbits_tilegrid.tdb", 128, 10),
         ("clb/build/segbits_tilegrid.tdb", 36, 2),
+        ("cfg/build/segbits_tilegrid.tdb", 30, 101),
         ("dsp/build/segbits_tilegrid.tdb", 28, 10),
         ("clk_hrow/build/segbits_tilegrid.tdb", 30, 18),
         ("clk_bufg/build/segbits_tilegrid.tdb", 30, 8),
diff --git a/fuzzers/005-tilegrid/cfg/Makefile b/fuzzers/005-tilegrid/cfg/Makefile
new file mode 100644
index 00000000..215b3469
--- /dev/null
+++ b/fuzzers/005-tilegrid/cfg/Makefile
@@ -0,0 +1,4 @@
+N ?= 2
+GENERATE_ARGS?="--oneval 1 --design params.csv --dword 67 --dframe 1B --dbit 18"
+include ../fuzzaddr/common.mk
+
diff --git a/fuzzers/005-tilegrid/cfg/generate.tcl b/fuzzers/005-tilegrid/cfg/generate.tcl
new file mode 100644
index 00000000..b28533cd
--- /dev/null
+++ b/fuzzers/005-tilegrid/cfg/generate.tcl
@@ -0,0 +1,2 @@
+source "$::env(XRAY_DIR)/utils/utils.tcl"
+generate_top
diff --git a/fuzzers/005-tilegrid/cfg/top.py b/fuzzers/005-tilegrid/cfg/top.py
new file mode 100644
index 00000000..e1d3a3e9
--- /dev/null
+++ b/fuzzers/005-tilegrid/cfg/top.py
@@ -0,0 +1,64 @@
+import os
+import random
+#random.seed(int(os.getenv("SEED"), 16))
+from prjxray import util
+from prjxray.db import Database
+
+
+def gen_sites():
+    db = Database(util.get_db_root())
+    grid = db.grid()
+    for tile_name in sorted(grid.tiles()):
+        loc = grid.loc_of_tilename(tile_name)
+        gridinfo = grid.gridinfo_at_loc(loc)
+        if gridinfo.tile_type in ['CFG_CENTER_MID']:
+            for site_name in sorted(gridinfo.sites.keys()):
+                if site_name.startswith("BSCAN_X0Y0"):
+                    yield tile_name, site_name
+
+
+def write_params(params):
+    pinstr = 'tile,val,site\n'
+    for tile, (site, val) in sorted(params.items()):
+        pinstr += '%s,%s,%s\n' % (tile, val, site)
+    open('params.csv', 'w').write(pinstr)
+
+
+def run():
+    print('''
+module top();
+    ''')
+    params = {}
+
+    sites = list(gen_sites())
+    jtag_chains = ("1", "2", "3", "4")
+    for (tile_name, site_name), isone in zip(sites,
+                                             util.gen_fuzz_states(len(sites))):
+        params[tile_name] = (site_name, isone)
+        print(
+            '''
+            (* KEEP, DONT_TOUCH, LOC = "{0}" *)
+            BSCANE2 #(
+            .JTAG_CHAIN("{1}")
+            )
+            BSCANE2_{0} (
+            .CAPTURE(),
+            .DRCK(),
+            .RESET(),
+            .RUNTEST(),
+            .SEL(),
+            .SHIFT(),
+            .TCK(),
+            .TDI(),
+            .TMS(),
+            .UPDATE(),
+            .TDO(1'b1)
+            );
+        '''.format(site_name, jtag_chains[isone]))
+
+    print("endmodule")
+    write_params(params)
+
+
+if __name__ == '__main__':
+    run()