HD66750 Datasheet, PDF (20/96 Pages) Hitachi Semiconductor – 128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions

HD66750/1
Instructions
Outline
The HD66750/1 uses the 16-bit bus architecture. Before the internal operation of the HD66750/1 starts,
control information is temporarily stored in the registers described below to allow high-speed interfacing
with a high-performance microcomputer. The internal operation of the HD66750/1 is determined by
signals sent from the microcomputer. These signals, which include the register selection signal (RS), the
read/write signal (R/W), and the data bus signals (DB15 to DB7), make up the HD66750/1 instructions.
There are seven categories of instructions that:
Â¥ Specify the index
Â¥ Read the status
Â¥ Control the display
Â¥ Control power management
Â¥ Process the graphics data
Â¥ Set internal CGRAM addresses
Â¥ Transfer data to and from the internal CGRAM
Normally, instructions that write data are used the most. However, an auto-update of internal CGRAM
addresses after each data write can lighten the microcomputer program load.
Because instructions are executed in 0 cycles, they can be written in succession.
20