Additional preview pages of the LM240128T datasheet.
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Frame Ground 0V Power Supply, Ground Positive Power Supply LCD Contrast Reference Input Write enable input, active LOW Read enable input, active LOW Chip Enable Signal Address for Data or Command
C/D=H, /WR=L, /RD=H: Command Write C/D=H, /WR=H, /RD=L: Status Read C/D=L, /WR=L, /RD=H: Data Write C/D