Port Number: B020-B026
Memory-mapped address: F60020-F60026
Function: Backlight Control
This range of ports controls the backlight. Ports in this range affect the backlight, generally causing the backlight to go to full brightness.
|B024||Backlight PWM level; controls the backlight PWM dimming level. 00 is full PWM duty cycle, FF is minimum duty cycle. When booting, this is set to FF, and later changed with the value in brightness.|