ra8806 RAIO Technology Inc., ra8806 Datasheet - Page 20
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
RAiO
REG [70h] Cursor Position Y Register (CURY)
REG [71h] Scrolling Action Range Begin Common Register (BGCM)
REG [72h] Scrolling Action Range END Common Register (EDCM)
REG [80h] Blink Time Register (BTMR)
Notes:
1. The Setting also determines the scroll moving speed.
2. The Frame width is the time that the controller scan whole panel, it depends on the system clock
TECHNOLOGY INC.
frequency, setting of display window, driver interface (4-bits/8-bits), Idle time (ITCR), and dual mode or
gray scale mode, etc.
7-0
7-0
7-0
7-0
Bit
Bit
Bit
Bit
Cursor Position of Common / RAM0 Address[8:5]
Define the cursor address of common, a value from 0h ~ EFh(0 ~ 239
in decimal).
When CGRAM write mode is selected (REG[12h] Bit[1:0] = 00b), the
Bit[3:0] is indicate which font will be created. And Bit[7:4] are not
available.
Common Start Position of Scrolling Mode
REG[71h] defines the begin position(top boundary) of scroll window, it
must be a value that less or equal to the REG[72h], which defines the
end position(bottom boundary) of scroll window. Also it must be less
then the value of EFh (239 in decimal), for the Display Data RAM limit.
Common Ending Position of Scrolling Mode
REG[72h] defines the end position(bottom boundary) of scroll window,
it must be a value that larger or equal to the REG[71h], which defines
the end position(top boundary) of scroll window. Also it must be less
or equal then the value of EFh (239 in decimal), for the Display Data
RAM limit.
Cursor Blink Time and Scroll Time
The Frame Rate is depends on the DWWR and DWHR and ITCR
setting.
Blinking Time = Bit[7:0] x (Frame width)
Frame width = 1/Frame Rate
Description
Description
Description
Description
20/184
Two Layers Character/Graphic LCD Controller
www.raio.com.tw
Default
Default
Default
Default
00h
00h
00h
00h
RA8806
Access
Access
Access
Access
R/W
R/W
R/W
R/W
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