RS  R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
=== === === === === === === === === ===
 0   0   0   0   0   0   1   D   C   B 

Details
D: The display is ON when D = 1 and OFF when D = 0.
When off due to D = 0, display data remains in the DD RAM. It can be displayed immediately by setting D = 1.

C: The cursor displays when C = 1 and does not display when C = 0.
Even if the cursor disappears, the function of I/D, etc. does not change during display data write.
The cursor is displayed using 5 dots in the 8th line when the 5 x 7 dot character font is selected and 5 dots in the 11th line when the 5 x 10 dot character font is selected.

B: The character indicated by the cursor blinks when B = 1.
The blink is displayed by switching between all blank dots and display characters at 409.6 ms interval.