diff --git a/shared-bindings/keypad/KeyMatrix.c b/shared-bindings/keypad/KeyMatrix.c
index 8303645f20183..edb32c2c5c700 100644
--- a/shared-bindings/keypad/KeyMatrix.c
+++ b/shared-bindings/keypad/KeyMatrix.c
@@ -67,6 +67,14 @@
//| in the respective state for ``debounce_threshold`` times on average.
//| Successive measurements are spaced apart by ``interval`` seconds.
//| The default is 1, which resolves immediately. The maximum is 127.
+//|
+//| .. warning:: On Raspberry Pi RP2350, using ``columns_to_anodes=False``
+//| normally depends on the internal pull-down resistors.
+//| This will not work, due to an RP2350 issue.
+//| The easiest fix is simply to swap the ``row_pins`` and ```column_pins`` and to set
+//| ``columns_to_anodes=True``. This requires no external components.
+//| An alternative is to add external pull-downs of 8.2 kohms or less, but that will draw more current.
+//| See the Warning in `digitalio` for more information.
//| """
//| ...
//|
diff --git a/shared-bindings/keypad/Keys.c b/shared-bindings/keypad/Keys.c
index 10ac81cf1fb63..64e8e51a67ded 100644
--- a/shared-bindings/keypad/Keys.c
+++ b/shared-bindings/keypad/Keys.c
@@ -69,6 +69,12 @@
//| in the respective state for ``debounce_threshold`` times on average.
//| Successive measurements are spaced apart by ``interval`` seconds.
//| The default is 1, which resolves immediately. The maximum is 127.
+//|
+//| .. warning:: On Raspberry Pi RP2350, using ``value_when_pressed=True`` and ``pull=True``,
+//| to enable using the internal pull-down resistor, will not work, due to an RP2350
+//| hardware issue. Instead, wire the switch to be ``value_when_pressed=False``, or add
+//| an external pull-down resistor of 8.2 kohms or less.
+//| See the Warning in `digitalio` for more information.
//| """
//| ...
//|
diff --git a/shared-bindings/keypad/__init__.c b/shared-bindings/keypad/__init__.c
index b29de197262f4..b182e977829d1 100644
--- a/shared-bindings/keypad/__init__.c
+++ b/shared-bindings/keypad/__init__.c
@@ -65,7 +65,7 @@ MP_PROPERTY_GETTER(keypad_generic_events_obj,
//| due to a GPIO hardware issue that causes excessive leakage current (~120uA).
//| A pin can read as high even when driven or pulled low, if the input signal is high
//| impedance or if an attached pull-down resistor is too weak (has too high a value).
-//| See the warning in `digitalio` for more information.
+//| See the warnings in `keypad.Keys`, `keypad.KeyMatrix`, and `digitalio` for workarounds and more information.
//|
//| .. jinja
//| """
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