update user defines
diff --git a/verilog/rtl/user_defines.v b/verilog/rtl/user_defines.v
index e577931..81c0430 100644
--- a/verilog/rtl/user_defines.v
+++ b/verilog/rtl/user_defines.v
@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2020 Efabless Corporation
+// SPDX-FileCopyrightText: 2022 Efabless Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
@@ -19,17 +19,22 @@
// User GPIO initial configuration parameters
`define __USER_DEFINES_H
+// deliberately erroneous placeholder value; user required to config GPIO's to other
+`define GPIO_MODE_INVALID 13'hXXXX
+
+// Authoritive source of these MODE defs is: caravel/verilog/rtl/user_defines.v
// Useful GPIO mode values. These match the names used in defs.h.
+//
`define GPIO_MODE_MGMT_STD_INPUT_NOPULL 13'h0403
-`define GPIO_MODE_MGMT_STD_INPUT_PULLDOWN 13'h0803
-`define GPIO_MODE_MGMT_STD_INPUT_PULLUP 13'h0c03
+`define GPIO_MODE_MGMT_STD_INPUT_PULLDOWN 13'h0c01
+`define GPIO_MODE_MGMT_STD_INPUT_PULLUP 13'h0801
`define GPIO_MODE_MGMT_STD_OUTPUT 13'h1809
`define GPIO_MODE_MGMT_STD_BIDIRECTIONAL 13'h1801
`define GPIO_MODE_MGMT_STD_ANALOG 13'h000b
`define GPIO_MODE_USER_STD_INPUT_NOPULL 13'h0402
-`define GPIO_MODE_USER_STD_INPUT_PULLDOWN 13'h0802
-`define GPIO_MODE_USER_STD_INPUT_PULLUP 13'h0c02
+`define GPIO_MODE_USER_STD_INPUT_PULLDOWN 13'h0c00
+`define GPIO_MODE_USER_STD_INPUT_PULLUP 13'h0800
`define GPIO_MODE_USER_STD_OUTPUT 13'h1808
`define GPIO_MODE_USER_STD_BIDIRECTIONAL 13'h1800
`define GPIO_MODE_USER_STD_OUT_MONITORED 13'h1802
