X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=keyboards%2Flets_split%2Freadme.md;h=6e296737a23c350f44a94857248ecf32c5493ecb;hb=7a9be2562d8386c4cdec7fa130d2608931d85590;hp=73fdb0f789d5352cb4f82348e8c23c4c2b9a0e11;hpb=ce01f88c43adef9344727998f53bb1cf74913f65;p=qmk_firmware.git

diff --git a/keyboards/lets_split/readme.md b/keyboards/lets_split/readme.md
index 73fdb0f78..6e296737a 100644
--- a/keyboards/lets_split/readme.md
+++ b/keyboards/lets_split/readme.md
@@ -100,3 +100,16 @@ half to a computer by USB the keyboard will use QWERTY and Colemak when the
 right half is connected.
 
 
+Notes on Using Pro Micro 3.3V
+-----------------------------
+
+Do update the `F_CPU` parameter in `rules.mk` to `8000000` which reflects
+the frequency on the 3.3V board.
+
+Also, if the slave board is producing weird characters in certain columns,
+update the following line in `matrix.c` to the following:
+
+```
+// _delay_us(30);  // without this wait read unstable value.
+_delay_us(300);  // without this wait read unstable value.
+```