diff --git a/hw/ip/pinmux/data/pinmux.hjson b/hw/ip/pinmux/data/pinmux.hjson
index eaef583..1e4b39c 100644
--- a/hw/ip/pinmux/data/pinmux.hjson
+++ b/hw/ip/pinmux/data/pinmux.hjson
@@ -836,6 +836,11 @@
                       resval: 0,
                       desc: '''Set to 1 if the corresponding detector has detected a wakeup pattern. Write 0 to clear.
                       '''
+                      // Random writes to the wkup detect CSRs may result in the case where the
+                      // wakeup gets enabled and signaled due to a pin being low for a programmed
+                      // time. In CSR tests, the IOs are not touched (i.e. they are internally
+                      // pulled low).
+                      tags: ["excl:CsrNonInitTests:CsrExclWriteCheck"]
                     }
                   ]
                 }
diff --git a/hw/ip/pinmux/data/pinmux.hjson.tpl b/hw/ip/pinmux/data/pinmux.hjson.tpl
index 4bc61e6..3f5f84a 100644
--- a/hw/ip/pinmux/data/pinmux.hjson.tpl
+++ b/hw/ip/pinmux/data/pinmux.hjson.tpl
@@ -848,6 +848,11 @@
                       resval: 0,
                       desc: '''Set to 1 if the corresponding detector has detected a wakeup pattern. Write 0 to clear.
                       '''
+                      // Random writes to the wkup detect CSRs may result in the case where the
+                      // wakeup gets enabled and signaled due to a pin being low for a programmed
+                      // time. In CSR tests, the IOs are not touched (i.e. they are internally
+                      // pulled low).
+                      tags: ["excl:CsrNonInitTests:CsrExclWriteCheck"]
                     }
                   ]
                 }
diff --git a/hw/top_earlgrey/ip/pinmux/data/autogen/pinmux.hjson b/hw/top_earlgrey/ip/pinmux/data/autogen/pinmux.hjson
index 1797686..73987f7 100644
--- a/hw/top_earlgrey/ip/pinmux/data/autogen/pinmux.hjson
+++ b/hw/top_earlgrey/ip/pinmux/data/autogen/pinmux.hjson
@@ -844,6 +844,11 @@
                       resval: 0,
                       desc: '''Set to 1 if the corresponding detector has detected a wakeup pattern. Write 0 to clear.
                       '''
+                      // Random writes to the wkup detect CSRs may result in the case where the
+                      // wakeup gets enabled and signaled due to a pin being low for a programmed
+                      // time. In CSR tests, the IOs are not touched (i.e. they are internally
+                      // pulled low).
+                      tags: ["excl:CsrNonInitTests:CsrExclWriteCheck"]
                     }
                   ]
                 }