Orient Display AMC2004AR-B-Y6WFDY-SPI

This LCD module incorporates an LSI controller containing two 8-bit registers: an Instruction Register (IR) and a Data Register (DR). The IR stores instruction codes such as display clear and cursor shift, as well as address information for the Display Data RAM (DDRAM) and Character Generator RAM (CGRAM). This register can only be written by the MPU. The DR temporarily stores data to be written to or read from DDRAM or CGRAM. When address information is written to the IR, data is transferred from DDRAM or CGRAM into the DR. The Address Counter (AC) assigns addresses to both DDRAM and CGRAM. The DDRAM stores display data represented as 8-bit character codes, with an extended capacity of 80×8 bits, or 80 characters. The Character Generator ROM generates 5×8-dot or 5×10-dot character patterns from 8-bit character codes. The Character Generator RAM allows users to reprogram character patterns. Up to eight character patterns can be written for the 5×8-dot format, and up to four for the 5×10-dot format. Character patterns stored in CGRAM can be displayed by writing the character codes at the addresses shown in the left column of Table 1 into DDRAM.