The interface circuit of dot matrix LCD display

  
It is shown using the MCS-51 series single-chip interface circuit 8051. Chip SED13 35 dot matrix LCD display for the controller, which can control
The interface circuit of dot matrix LCD display - schematic

up to 640 256 dot matrix LCD display for graphics and character display, capable of addressing 64KB buffer display buffer zone. FIG role -LCD monitor each port as follows; D3 ~ DO data port for display; DP is no display power-off control signal} YD is Y (column) drive data output valid signal; FR frame control signal; XECL as X ( line) driving data output valid signal; XSCL data port data latch signal. Using 8051 as the port PO data port, assembly language programming, the use of instruction MOVXA. Ri (Ie indirect access to external RAM) manner SED1335 data exchange. The C programming language, the way places to visit pointer ask SED1335.




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