RA8835A
Version 1.0
Dot Matrix LCD Controller
Table-16: Cursor Shift Direction
C
CD1
CD0
Shift direction
4CH
4DH
4EH
4FH
0
0
1
1
0
1
0
1
Right
Left
Up
Down
Note: Since the cursor moves in address units even if FX ≥ 9 , the cursor address increment must
be preset for movement in character units. See Section 10-3.
6-3-5 OVLAY
Selects layered screen composition and screen text/ graphics mode.
MSB
LSB
C
0
0
1
0
0
0
1
1
0
1
1
P1
OV
DM2 DM1 MX1 MX0
Figure 6-17: OVLAY Parameters
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.
Table-17: Composition Method Selection
Functio
MX1 MX0
Composition Method
Applications
n
L1 ∪ L2
∪ L3
(L1 ⊕
L2) ∪ L3
(L1 ∩
L2) ∪ L3
L1 > L2
> L3
Underlining, rules, mixed text
and graphics
Inverted characters, flashing
regions, underlining
0
0
1
0
1
0
1
OR
Exclusive-OR
AND
Simple animation, three-
dimensional appearance
1
Priority-OR
Notes:
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)
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