diff --git a/minitests/iostandard/dump_iobs.tcl b/minitests/iostandard/dump_iobs.tcl
index 4902a4e0..05767626 100644
--- a/minitests/iostandard/dump_iobs.tcl
+++ b/minitests/iostandard/dump_iobs.tcl
@@ -1,7 +1,7 @@
 proc dump_iobs {file_name} {
 
     set fp [open $file_name w]
-    puts $fp "tile,site_name,site_type,clock_region,bank,pkg_pin,is_bonded,is_clock,is_global_clock,is_vref"
+    puts $fp "tile,site_name,site_type,clock_region,bank,pkg_pin,is_bonded,is_clock,is_global_clock,is_vref,pin_func"
 
     foreach tile [get_tiles *IOB33*] {
         foreach site [get_sites -of_objects $tile] {
@@ -15,8 +15,9 @@ proc dump_iobs {file_name} {
             set is_clock [get_property IS_CLK_CAPABLE $pin]
             set is_global_clock [get_property IS_GLOBAL_CLK $pin]
             set is_vref [get_property IS_VREF $pin]
+            set pin_func [get_property PIN_FUNC $pin]
 
-            puts $fp "$tile,$site,$site_type,$clock_region,$bank,$pkg_pin,$is_bonded,$is_clock,$is_global_clock,$is_vref"
+            puts $fp "$tile,$site,$site_type,$clock_region,$bank,$pkg_pin,$is_bonded,$is_clock,$is_global_clock,$is_vref,$pin_func"
         }
     }
 
diff --git a/minitests/iostandard/features/generate.py b/minitests/iostandard/features/generate.py
index c08e6e7f..33d87101 100644
--- a/minitests/iostandard/features/generate.py
+++ b/minitests/iostandard/features/generate.py
@@ -154,8 +154,10 @@ def run():
                 (
                     site["site_name"],
                     site["site_type"],
-                ) for site in iob_sites[region] if site["is_bonded"]
-                and not int(site["is_vref"]) and "SING" not in site["tile"]
+                )
+                for site in iob_sites[region]
+                if site["is_bonded"] and not int(site["is_vref"]) and "SING"
+                not in site["tile"] and not "PUDC_B" in site["pin_func"]
             ]
             if not len(sites):
                 continue