(1)P/S:Parallel/Serial Data Input Switch. H: Parallel, L: Serial.
(2)C86:MPU Interface Switch Terminal. H: 6800 L: 8080.
(3-7)V5-V1:Power Supply Voltage.
(8)CAP2+:DC/DC voltage converter.
(9)CAP2-:DC/DC voltage converter.
(10)CAP1-:DC/DC voltage converter.
(11)CAP1+:DC/DC voltage converter.
(12)CAP3-:DC/DC voltage converter.
(13)VOUT:DC/DC voltage converter.
(14)VSS:GND(+0V).
(15)VDD:Power Supply Voltage(+5V).
(16-23)D7~D0:Data Input.
(24)E(/RD):Enable Signal.
(25)R/W(/WR):Read/Write Signal.
(26)A0:Data/Instruction Selection Signal.
(27)RES:Reset Signal.
(28)/CS1:Chip Select Signal.