HD66773R Datasheet, PDF (106/133 Pages) Renesas Technology Corp – 262,144-color, 132 x 176-dot Graphics Controller Driver for TFT LCD panels

HD66773R
Screen -split Drive Function
The HD66773R allows selectively driving two screens at arbitrary positions with the screen-drive position
registers (R42 and R43). Only the raster-rows required to display two screens at arbitrary positions are
selectively driven to reduce power consumption.
The first screen drive position register (R42) specifies the start line (SS17-10) and the end line (SE17-10)
for displaying the first screen. The second screen drive position register (R43) specifies the start line
(SS27-20) and the end line (SE27-20) for displaying the second screen. The second screen control is
effective when the SPT bit is set to 1. The total number of raster-rows driven for displaying the first and
second screens must be less than the number of liquid crystal drive raster-rows.
G1
G7
G26
G42
1st screen: 7
raster-row driving
Non-display area
2nd screen: 17
raster-row driving
Non-display area
Driven raster-rows: Nl4-0 = "10101" (176 raster-rows)
First screen setting : SS17-10 = "00"H, SE17-10 - "06"H
Second screen setting : SS27-20 = "19"H, SE27-20 - "29"H, SPT = "1"
Rev.1.10, Jun.21.2003, page 106 of 133