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

Details
Writes binary 8 bit data DDDDDDDD to the CG or the DD RAM. Whether the CG or DD RAM is to be written is determined by the previous specification of CG RAM or DD RAM address setting. After the write, the address is automatically incremented or decremented by 1 according to entry mode. The entry mode also determines display shift.