ra8835a RAIO Technology Inc., ra8835a Datasheet - Page 29

• Manufacturer Part Number: ra8835a
• Description: Dot Matrix Lcd Controller
• Manufacturer: RAIO Technology Inc.

RAiO TECHNOLOGY INC.
Version 1.0
6-3-5 OVLAY
Selects layered screen composition and screen text/ graphics mode.
6-3-5-1 MX0, MX1
MX0 and MX1 set the layered screen composition method, which can be either OR, AND,
Exclusive-OR or Priority- OR. Since the screen composition is organized in layers and not by
screen blocks, when using a layer divided into two screen blocks, different composition methods
cannot be specified for the individual screen blocks. The Priority-OR mode is the same as the OR
mode unless flashing of individual screens is used.
Notes:
Note: Since the cursor moves in address units even if
MX1
L1: First layer (text or graphics). If text is selected, layer L3 cannot be used.
L2: Second layer (graphics only)
L3: Third layer (graphics only)
0
0
1
1
be preset for movement in character units. See Section 10-3.
MX0
0
1
0
1
L1 ∪ L2
∪ L3
(L1 ⊕
L2) ∪ L3
(L1 ∩
L2) ∪ L3
Functio
L1 > L2
P1
C
> L3
MSB
n
Table-17: Composition Method Selection
4CH
4DH
4EH
4FH
C
0
0
Figure 6-17: OVLAY Parameters
Table-16: Cursor Shift Direction
Composition Method
OR
Exclusive-OR
AND
Priority-OR
1
0
CD1
0
0
1
1
0
0
29/88
CD0
OV
1
0
1
0
1
DM2
1
Shift direction
DM1
0
Down
Right
Left
Up
FX ≥
MX1
1
Underlining, rules, mixed text
and graphics
Inverted characters, flashing
regions, underlining
Simple animation, three-
dimensional appearance
9
, the cursor address increment must
MX0
1
LSB
Applications
Dot Matrix LCD Controller
RA8835A
www.raio.com.tw