ra8806 RAIO Technology Inc., ra8806 Datasheet - Page 17

• Manufacturer Part Number: ra8806
• Description: Two Layers Character/graphic Lcd Controller
• Manufacturer: RAIO Technology Inc.

Preliminary Version 1.2
RAiO
REG [12h] Memory Access Mode Register (MAMR)
TECHNOLOGY INC.
6-4
3-2
1-0
Bit
7
Cursor Auto Shifting Direction
0 : Cursor moves horizontally (left to right) first then vertically (top to
1 : Cursor moves vertically first then horizontally.
Note: In graphic mode, the cursor moving is treated as unit of bytes in
horizontal direction. At vertical direction, it’s treated as unit of bit. At
text mode, the bit is ignored, and the cursor moving is always in
horizontal direction.
Display Layer and Display Mode Selection
0 0 0 : Gray Mode. In this mode, each pixel consists with 2 continuous
---------------------------------------------------
Note: Gray mode doesn’t support text-mode input.
0 0 1 : Show DDRAM1 data on screen.
0 1 0 : Show DRRAM2 data on screen.
0 1 1 : Show Two Layer Mode. The display rule depends on Bit-3 and
1 0 X : NA.
1 1 0 : Extension Mode (1), the panel will show both DDRAM1 and
1 1 1 : Extension Mode (2), the panel will show both DDRAM1 and
Two Layer Mode Selection
Combine the data of DDRAM1 and DDRAM2 on the screen when
Bit[6:4] is set as “011”.
0 0 : DDRAM1 “OR” DDRAM2.
0 1 : DDRAM1 “XOR” DDRAM2.
1 0 : DDRAM1 “NOR” DDRAM2.
1 1 : DDRAM1 “AND” DDRAM2.
MPU Read/Write Layer Selection
0 0 : Access CGRAM.(512Byte)
0 1 : Access DDRAM1.
1 0 : Access DDRAM2.
1 1 : Access both DDRAM1 and DDRAM2 concurrently
down).
bit1
0
0
1
1
bits in memory data. With the FRC methodology, 4-level-gray
mode is implemented. The bit mapping is list as below.
Bit-2 as following.
DDRAM2 data on the screen. The RA8806 is available for
640x240 pixels panel.
DDRAM2 on the screen. The RA8806 is available for 320x480
pixels panel.
bit0
0
1
0
1
Level1 (Lightest)
Level2
Level3
Level4 (Darkest)
Gray
Description
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Two Layers Character/Graphic LCD Controller
www.raio.com.tw
Default
001
00
01
0
RA8806
Access
R/W
R/W
R/W
R/W