Displaytech 162G BC BW

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 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. Once address information is written to the IR, data is transferred from the DR to DDRAM or CGRAM. These two registers are selected via the Register Select (RS) signal. When the Busy Flag (BF) is set to 1, it indicates that the LSI controller is in an internal operation mode and will not accept the next instruction. When RS=0 and R/W=1, the BF is output to DB7. The next instruction must not be written until the BF is confirmed to be 0. The Address Counter (AC) assigns addresses to DDRAM and CGRAM. DDRAM stores display data represented as 8-bit character codes, with an extended capacity of 80×8 bits, accommodating up to 80 characters. The Character Generator ROM (CGROM) generates 5×8-dot or 5×10-dot character patterns from 8-bit character codes. The Character Generator RAM (CGRAM) allows users to reprogram custom character patterns — up to 8 character patterns for 5×8-dot format, or up to 4 character patterns for 5×10-dot format. Character patterns stored in CGRAM can be displayed by writing the corresponding character codes listed in the left column of Table 1 into DDRAM.