RA8806
Preliminary Version 1.0
Two Layers Character/Graphic LCD Controller
6-2 Driver Interface
The main function of Driver Interface is to generate Frame (Pin “FR”), Latch Pulse (Pin “LP”), “YD” and
Data Bus (LD[7:0]) for external LCD driver IC. RA8806 could both support 4-bits and 8-bits LCD driver
interface. Pin “DW” is for LCD driver data bus selection. If “DW” pulls high then 8-bits LCD driver is used.
If pull low then 4-bits LCD driver is used. Figure 6-8 is the LCD interface of RA8806.
LCD Driver
RA8806
STN
YD
FR
LP
FLM
M
Common Signals
Dot Matrix
LCD Panel
LP
ZDOFF
XCK
/DISPOFF
CP
Segment Signals
LD[7:0]
D[7:0]
Figure 6-8 : The Interface of RA8806 and LCD Driver
Figure 6-9 is the timing waveform of RA8806 and LCD Driver. Users could also refer to Section 4-4
“LCD Driver Interface” for LCD driver pin description.
For 320x240: Total 240
LP for each Fram e
FR
YD
LP
XCK
1st line
FR
YD
LP
XCK
LD
(Data)
Figure 6-9 : The Waveform of RA8806 and LCD Driver
RAiO TECHNOLOGY INC.
31/174
www.raio.com.tw
RAIO [ RAIO TECHNOLOGY INC. ]
