Orient Display AMC0802DR-B-Y6WFDY

This LCD display module has a built-in LSI controller containing two 8-bit registers: an Instruction Register (IR) and a Data Register (DR). The IR stores instruction codes (e.g., display clear and cursor move) as well as address information for the Display Data RAM (DDRAM) and Character Generator RAM (CGRAM). The IR can only be written by the MPU. The DR temporarily stores data to be written to or read from DDRAM and CGRAM. When address information is written to the IR, data is transferred from DDRAM or CGRAM into the DR. These two registers are selected via the Register Select (RS) signal. When the busy flag (BF) is 1, the controller LSI is in internal operation mode and will not accept the next instruction. When RS=0 and R/W=1, the busy flag is output to DB7. The next instruction must not be written until the busy flag is confirmed to be 0. The Address Counter (AC) assigns addresses to DDRAM and CGRAM. DDRAM stores display data in 8-bit character codes, with an extended capacity of 80×8 bits, or 80 characters. The Character Generator ROM (CGROM) generates 5×8-dot or 5×10-dot character patterns from 8-bit character codes. In CGRAM, users can rewrite characters through programming — eight character patterns for 5×8-dot, and four character patterns for 5×10-dot. Writing a character code to the address shown in the left column of Table 1 in DDRAM will display the character pattern stored in CGRAM.