EPD PINOUT Interface PIN# Note SPI 24 PIN Cover most of the EPD screen SPI 30 PIN SPI 30x2 PIN Cascade display Parallel 26 PIN Parallel 34 PIN Special case Interface PIN# Product Name Parallel 33 PIN GDEP097TC2 Parallel 40 PIN GDEW078C01 Parallel 50x4 PIN GDEP312TT2-D