|`BACKLIGHT_PWM_DRIVER` |`PWMD4` |The PWM driver to use |
|`BACKLIGHT_PWM_CHANNEL`|`3` |The PWM channel to use |
|`BACKLIGHT_PAL_MODE` |`2` |The pin alternative function to use |
|`BACKLIGHT_PWM_PERIOD` |*Not defined*|The PWM period in counter ticks - Default is platform dependent|
Refer to the ST datasheet for your particular MCU to determine these values. For example, these defaults are set up for pin `B8` on a Proton-C (STM32F303) using `TIM4_CH3` on AF2. Unless you are designing your own keyboard, you generally should not need to change them.