1 files changed, 22 insertions, 0 deletions
diff --git a/docs/Config_Reference.md b/docs/Config_Reference.md
index 17c9d6e2..9c9755ff 100644
--- a/docs/Config_Reference.md
+++ b/docs/Config_Reference.md
@@ -2471,6 +2471,28 @@ clock_pin:
 #initial_BLUE: 0.0
 #   See the "neopixel" section for information on these parameters.
 ```
+## [PCA9533]
+PCA9533 LED support. The PCA9533 is used on the mightyboard.
+
+```
+[pca9533 my_pca9533]
+#i2c_address: 98
+#   The i2c address that the chip is using on the i2c bus. The default
+#   is 98 for the PCA9533/1, 99 for the PCA9533/2.
+#i2c_mcu:
+#i2c_bus:
+#i2c_speed:
+#   See the "common I2C settings" section for a description of the
+#   above parameters.
+#initial_RED: 1
+#initial_GREEN: 1
+#initial_BLUE: 1
+#initial_WHITE: 1
+#    The PCA9533 only supports 1 or 0, any other values will be considered as 1. The default is 0.
+#    On the mightyboard, the white led is not populated.
+#    Use GCODE to modify led values after startup.
+#    set_led led=my_pca9533 red=1 green=1 blue=1
+```
 
 ## [gcode_button]