          4-  ,
  SPI,  5-  .
   ATTiny2313, 4.
  
     :
E        - PortA.0   .5
RS       - PortA.1   .4
Data4..7 - PortB.0..3   .12..15

:
 up    - PortD.0  .2
 left  - PortD.1  .3
 right - PortD.2  .6
 down  - PortD.3  .7
 menu  - PortD.4  .8
 
    - PortD.5 () - .9
  - PortB.4 () - .16


