diff --git a/shared-bindings/keypad/KeyMatrix.c b/shared-bindings/keypad/KeyMatrix.c
index 7a8bb97247a5..b832d74bded4 100644
--- a/shared-bindings/keypad/KeyMatrix.c
+++ b/shared-bindings/keypad/KeyMatrix.c
@@ -159,6 +159,9 @@ static void check_for_deinit(keypad_keymatrix_obj_t *self) {
 //|         """Reset the internal state of the scanner to assume that all keys are now released.
 //|         Any key that is already pressed at the time of this call will therefore immediately cause
 //|         a new key-pressed event to occur.
+//|         For instance, if you call `reset()` immediately after creating a `KeyMatrix` object
+//|         at the beginning of your program, the events it generates will let you determine which keys
+//|         were being held down at program start.
 //|         """
 //|         ...
 
diff --git a/shared-bindings/keypad/Keys.c b/shared-bindings/keypad/Keys.c
index 208bc0a62d49..996f13d8a13c 100644
--- a/shared-bindings/keypad/Keys.c
+++ b/shared-bindings/keypad/Keys.c
@@ -147,6 +147,9 @@ static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(keypad_keys___exit___obj, 4, 4, keypa
 //|         """Reset the internal state of the scanner to assume that all keys are now released.
 //|         Any key that is already pressed at the time of this call will therefore immediately cause
 //|         a new key-pressed event to occur.
+//|         For instance, if you call `reset()` immediately after creating a `Keys` object
+//|         at the beginning of your program, the events it generates will let you determine which keys
+//|         were being held down at program start.
 //|         """
 //|         ...
 
diff --git a/shared-bindings/keypad/ShiftRegisterKeys.c b/shared-bindings/keypad/ShiftRegisterKeys.c
index e74dce0ac237..8508619d9874 100644
--- a/shared-bindings/keypad/ShiftRegisterKeys.c
+++ b/shared-bindings/keypad/ShiftRegisterKeys.c
@@ -201,6 +201,9 @@ static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(keypad_shiftregisterkeys___exit___obj
 //|         """Reset the internal state of the scanner to assume that all keys are now released.
 //|         Any key that is already pressed at the time of this call will therefore immediately cause
 //|         a new key-pressed event to occur.
+//|         For instance, if you call `reset()` immediately after creating a `ShiftRegisterKeys` object
+//|         at the beginning of your program, the events it generates will let you determine which keys
+//|         were being held down at program start.
 //|         """
 //|         ...
 
diff --git a/shared-bindings/keypad_demux/DemuxKeyMatrix.c b/shared-bindings/keypad_demux/DemuxKeyMatrix.c
index 9f6d65c3dd33..8c867aecee08 100644
--- a/shared-bindings/keypad_demux/DemuxKeyMatrix.c
+++ b/shared-bindings/keypad_demux/DemuxKeyMatrix.c
@@ -147,6 +147,9 @@ static void check_for_deinit(keypad_demux_demuxkeymatrix_obj_t *self) {
 //|         """Reset the internal state of the scanner to assume that all keys are now released.
 //|         Any key that is already pressed at the time of this call will therefore immediately cause
 //|         a new key-pressed event to occur.
+//|         For instance, if you call `reset()` immediately after creating a `DemuxKeyMatrix` object
+//|         at the beginning of your program, the events it generates will let you determine which keys
+//|         were being held down at program start.
 //|         """
 //|         ...
 
diff --git a/shared-module/keypad/__init__.c b/shared-module/keypad/__init__.c
index e43c7bce4fb0..80e61f3ec7b6 100644
--- a/shared-module/keypad/__init__.c
+++ b/shared-module/keypad/__init__.c
@@ -140,7 +140,7 @@ void keypad_never_reset(keypad_scanner_obj_t *self) {
 void common_hal_keypad_generic_reset(void *self_in) {
     keypad_scanner_obj_t *self = self_in;
     size_t key_count = common_hal_keypad_generic_get_key_count(self);
-    memset(self->debounce_counter, self->debounce_threshold, key_count);
+    memset(self->debounce_counter, -self->debounce_threshold, key_count);
     keypad_scan_now(self, port_get_raw_ticks(NULL));
 }