HD66766R Datasheet, PDF (17/97 Pages) Hitachi Semiconductor – 132 x 176-dot Graphics LCD Controller/Driver for 65K Colors

HD66766R
Rev. 1.0-1 / September 2002
Instructions
Outline
The HD66766R uses the 16-bit bus architecture. Before the internal operation of the HD66766R 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 HD66766R 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 HD66766R 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.
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