YMS204-01 modules equivalent, standard character modules.
GND(0V) Power Supply(5V) Supply Voltage LCD Driver Register Select-LOW=Instruction,HIGH=Data Read/Write LOW=MPU to LCM,HIGH=LCM to MPU Eable R/W=LOW:Data are talking over at falling edge R/W=HIGH:Data can be read at E=1 Data Bus-Software Selectable 4.
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