Most LCD controllers can be interfaced by an 8-bit, 4-bit, or 2-bit I2C, or 1-bit interface.

common drivers and segment drivers are the two unique types of driver ICs. common drivers
produce signals to create rows or numbers of lines. Segment drivers produce signals to create the
characters or columns.

The controller IC receives data written in ASCII or JIS code from the MPU. This data in stored
in RAM and is then converted into serial character patterns and transferred to the LCD driver IC.

The most commonly used in monochrome graphic and newer TFT LCD modules, the driver/

controller IC receives data from the MPU and stores it in RAM. This IC also accepts commands
directly from the MPU for both the common and segment drivers.

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