Rev. 0.5, July.31.2003, page 1 of 196
Preliminary
HD66781
720-channel Source Driver
for a-Si TFT/Low Temperature Poly-Si TFT Panels
with 262,144-color display RAM
REJxxxxxxx-xxxxZ
Rev.0.5
July.31.2003
Index
Description ......................................................................................................... 6
Features
......................................................................................................... 7
Block Diagram.................................................................................................... 8
Pin Functions ...................................................................................................... 9
HD66781 power-supply specification....................................................................................14
Pad Arrangement................................................................................................. 15
Pad Coordinate.................................................................................................... 16
Bump Arrangement............................................................................................. 18
Example of Connecting HD66781 and HD66783 .............................................. 19
Example of Connecting HD66781 and HD667P21............................................ 20
Block Function.................................................................................................... 21
(1)
System interface................................................................................................................21
(2)
External Display Interface (RGB I/F, VSYNC I/F)..........................................................22
(3)
Address Counter (AC)......................................................................................................22
(4)
Graphic RAM (GRAM)....................................................................................................22
(5)
Grayscale Voltage Generation Circuit..............................................................................22
(6)
Timing generator...............................................................................................................23
(7)
Oscillation Circuit (OSC) .................................................................................................23
(8)
Liquid Crystal Display Driver Circuit ..............................................................................23
(9)
Gate driver/power supply IC interfacing circuit ...............................................................23
GRAM Address MAP......................................................................................... 24
Relation between GRAM addresses and Screen positions (SS=0, BGR=0)..........................24
Relation between GRAM data and Display data (SS=0, BGR=0).........................................25
Relation between GRAM address and Screen position (SS=1, BGR=1)...............................28
Relation between GRAM data and Display data (SS=1, BGR=1).........................................29