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docs/features/split_keyboard.md
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@ -139,6 +139,30 @@ Note that adding a diode at a previously unused intersection will effectively te
While `MATRIX_MASKED` isn't necessary to use `SPLIT_HAND_MATRIX_GRID` successfully, without it you may experience issues trying to suspend your computer with your keyboard attached as the matrix will always report at least one key-press.
For example, suppose you have the following keyboard.
```c
#define MATRIX_ROW_PINS { D4, C6, D7, E6, B4 }
#define MATRIX_COL_PINS { F4, F5, F6, F7, B1, B3, B2 }
/* COL2ROW, ROW2COL*/
#define DIODE_DIRECTION COL2ROW
```
<img width="1389" src="https://i.imgur.com/MrcBQ78.png">
You can add a diode to the circuit as below and further configuration as below.
<img width="1389" src="https://i.imgur.com/GCi0WML.png">
```c
/* Split hand configration */
#define SPLIT_HAND_MATRIX_GRID D4,B2
```
#### Handedness by EEPROM
This method sets the keyboard's handedness by setting a flag in the persistent storage (`EEPROM`). This is checked when the controller first starts up, and determines what half the keyboard is, and how to orient the keyboard layout.