EPSON                 SPECIFCATIONS                            PAGE 18

     Terminal   I/O                   Function

       ___            Chip Select Input
       CS1       I      ___  ____
      _____             CS1, CS1-N (N: 1-4) = active "0"
      CS1-N             CS2, CS2-N (N: 1-4) = active "1"
     (N: 1-4)         As for models which display more than
       CS2            80 characters, in other words, models
      CS2-N           which use plural controller LSIs, each
     (N: 1-4)         controller LSI has a chip select
                      terminal and corresponds to each
     N = Chip         display area.
       number         For corresponence with display areas,
                      refer to IV. E. "Character Address Code
                      (P. 27)".

      ___             Ready Output
      RDY        O
     _____            These terminals output Ready or Not
     RDY-N            Ready of inside conditions of the
    (N: 1-4)          hardware.

    N = Chip          RDY, RDY-N = "0": Ready
      number          RDY, RDY-N = "1": Not Ready

                      (Note) When Reset signal is input, RDY
                             is "0". (This signal status
                             will be "Ready".)

                      As for models which display more than
                      80 characters, in other words, models
                      which use plural controller LSIs, each
                      controller LSI has a ready output
                      terminal, and corresponds to each
                      display area.
                      For correspondence with display areas,
                      refer to IV. E. "Character Address Code
                      (P. 27)".


                      No.  Signal     No.  Signal
                      A1   Vdd (+5v)  B1   ~RESET
                      A2   ENB        B2   nc
                      A3   nc         B3   ~RDY-1
                      A4   ~RDY-2     B4   ~RD
                      A5   ~WR        B5   ~CS1-1
EA-Y40040AT           A6   ~CS1-2     B6   CS2-1
                      A7   CS2-2      B7   A0
EA-Y20080AT           A8   D0         B8   D1
EA-Y80025AT           A9   D2         B9   D3
                      A10  D4         B10  D5
                      A11  D6         B11  D7
                      A12  VR1        B12  VR2
                      A13  FG         B13  Vss (GND)