ra8806 RAIO Technology Inc., ra8806 Datasheet - Page 94
ra8806
Manufacturer Part Number
ra8806
Description
Two Layers Character/graphic Lcd Controller
Manufacturer
RAIO Technology Inc.
Datasheet
1.RA8806.pdf
(184 pages)
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Preliminary Version 1.2
RA O
i
6-12 Scroll Function
TECHNOLOGY INC.
6-12-1 Horizontal Scrolling
especially under Rotate 90 degree and Font Enlargement mode.
The RA8806 provide Horizontal Scrolling function. You can assign an area by Register BGSG and
EDSG. Once start the horizontal scrolling, the assigned area will shift step by step and each step is
8 pixels width.
About Horizontal Scrolling register setting, please refer to the list below.
(1)Flowchart: The flow-chart of horizontal scrolling is as following:
BGCM
BGSG
EDSG
EDCM
ADSR
Reg.
Bit_Num
Bit [5:0]
Bit [5:0]
Bit [7:0]
Bit [7:0]
Bit 2
Bit 1
Bit 0
SCR_DIR(Scroll direction)
SCR_HV(Scroll Horizontal/Vertical)
SCR_EN(Scroll Enable)
The SEG start address in scroll mode
The SEG end address in scroll mode
The COM start address in scroll mode
The COM end address in scroll mode
Figure 6-58 : Horizontal Scrolling
( Set REG[61h],[62h],[71h],[72h])
Set Scrolling Window Boundary
( Set REG[03h][2:1] = 0 0 )
Enable Scrolling Function
Write Chinese font filled
Set Scrolling Direction,
( REG[03h]B0 = 1 )
with the screen
Table 6-37
Left to Right
Description
Start
94/184
Two Layers Character/Graphic LCD Controller
REG[03h]
REG[61h]
REG[62h]
REG[71h]
REG[72h]
Reference
www.raio.com.tw
RA8806
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