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-rw-r--r--keyboard/hhkb/matrix.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/keyboard/hhkb/matrix.c b/keyboard/hhkb/matrix.c
index fb9699794..14fae0b82 100644
--- a/keyboard/hhkb/matrix.c
+++ b/keyboard/hhkb/matrix.c
@@ -132,7 +132,13 @@ uint8_t matrix_scan(void)
// NOTE: KEY_STATE keep its state in 20us after KEY_ENABLE.
// This takes 25us or more to make sure KEY_STATE returns to idle state.
+#ifdef HHKB_JP
+ // Looks like JP needs faster scan due to its twice larger matrix
+ // or it can drop keys in fast key typing
+ _delay_us(30);
+#else
_delay_us(75);
+#endif
}
if (matrix[row] ^ matrix_prev[row]) matrix_last_modified = timer_read32();
}