LCD_CLKCONTROL_BF_BIT
#define LCD_CLKCONTROL_BF_MASK (0x1F << LCD_CLKCONTROL_BF_BIT)
#define LCD_CLKCONTROL_BF_N(N) ((((N)-1) << LCD_CLKCONTROL_BF_BIT) & LCD_CLKCONTROL_BF_MASK)
