8.3 8080- series MCU Parallel InterfaceThe MCU uses one of following interface: 11-lines with 8-data parallel interface, 12-lines with 9-dataparallel interface, 19-lines with 16-data parallel interface, or 21-lines with 18-data parallel interface. Thechip-select CSX(active low) enables and disables the parallel interface. RESX (active low) is an external resetsignal. The R/WX is the Read/Write flag and D[17:0] is parallel data bus.The LCD driver reads the data at the rising edge of WRX signal. The D/CX is the data/command flag.When D/CX=’1’, D[17:0] bits is either display data or command parameter. When D/C=’0’, D[17:0] bits iscommand.The 8080- series bi-directional interface can be used for communication between the micro controllerand LCD driver. Interface bus width can be selected with IM3, IM2, IM1 and IM0.The interface functions of8080- series parallel interface are given in Table 11 The function of 8080- series parallel interface.IM3 IM2