HD66760 Datasheet, PDF (18/105 Pages) Hitachi Semiconductor – 104 X 80-dot Graphics LCD Controller/Driver for 256 Colors

HD66760
Instructions
Outline
The HD66760 uses the 16-bit bus architecture. Before the internal operation of the HD66760 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 HD66760 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 DB0), make up the HD66760 instructions. There are eight categories of
instructions that:
• Specify the index
• Read the status
• Control the display
• Control power management
• Process the graphics data
• Set internal GRAM addresses
• Transfer data to and from the internal GRAM
• Set grayscale level for the internal grayscale palette table
Normally, instructions that write data are used the most. However, an auto-update of internal GRAM
addresses after each data write can lighten the microcomputer program load.
Because instructions are executed in 0 cycles, they can be written in succession.