ra8835 Topway Display, ra8835 Datasheet - Page 27

• Manufacturer Part Number: ra8835
• Description: Dot Matrix Lcd Controller
• Manufacturer: Topway Display

RAiO TECHNOLOGY INC.
Version 1.7
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
4EH
4FH
0
0
Figure 6-17: OVLAY Parameters
Composition Method
OR
Exclusive-OR
AND
Priority-OR
1
0
1
1
0
0
27/86
OV
1
0
1
DM2
1
DM1
0
Down
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
www.raio.com.tw
RA8835