S6A0075 Datasheet, PDF (21/70 Pages) Samsung semiconductor – 100 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD

100 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD
S6A0075
INSTRUCTION DESCRIPTION
OUTLINE
To overcome the speed difference between internal clock of S6A0075 and MPU clock, S6A0075 performs
internal operation by storing control information to IR or DR. The internal operation is determined according to the
signal from MPU, composed of read/write and data bus. (refer to Table 6/10) Instruction can be divided largely
four kinds,
• S6A0075 function set instructions (set display methods, set data length, etc.)
• Address set instructions to internal RAM
• Data transfer instructions with internal RAM
• Others .
The address of internal RAM is automatically increased or decreased by 1.
When IE = "High", S6A0075 is operated according to instruction set 1 (Table 6) and when IE = "Low", S6A0075 is
operated according to instruction set 2 (Table 10).
NOTE: During internal operation, busy flag (DB7) is read high. Busy flag check must precede the next instruction. When an
MPU program with Busy Flag (DB7) checking is made, 1/2 fosc (is necessary) for executing the next instruction by
the falling edge of the “E” signal after the Busy Flag (DB7) goes to “Low”.
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