RA8835A
Version 1.0
Dot Matrix LCD Controller
6-3-7 HDOT SCR
While the SCROLL command only allows scrolling by characters, HDOT SCR allows the screen to
be scrolled horizontally by pixels. HDOT SCR cannot be used on individual layers.
MSB
LSB
C
0
0
1
0
0
0
1
0
1
0
0
1
0
P1
D2
D1
D0
Figure 6-20: HDOT SCR Parameters
6-3-7-1 D0 to D2
Specifies the number of pixels to scroll. The C/R parameter has to be set to one more than the
number of horizontal characters before using HDOT SCR. Smooth scrolling can be simulated if the
controlling microprocessor repeatedly issues the HDOT SCR command to the RA8835A series.
See Section 9-5 for more information on scrolling the display.
Table-18: Scroll Step Selection
Number of pixels to
P1
scroll
HEX
00
01
02
↓
D2 D1 D0
0
0
0
↓
1
0
0
1
↓
1
0
1
0
↓
0
0
1
2
↓
6
06
07
1
1
1
7
A
B
X
Y
M = 0
N = 0
A
B
Y
Z
X
A
B
Y
Z
X
Display width
N
M/N is the number of bits(dots) that parameter 1 (P1) is
incremented/decremented by.
Figure 6-21 Horizontal Scrolling
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RAIO [ RAIO TECHNOLOGY INC. ]
