ra8835a RAIO Technology Inc., ra8835a Datasheet - Page 31

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

RAiO TECHNOLOGY INC.
Version 1.0
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.
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.
M/N is the number of bits(dots) that parameter 1 (P1) is
incremented/decremented by.
HEX
Z
00
01
02
06
07
↓
P1
C
A
Z
MSB
A
Figure 6-20: HDOT SCR Parameters
Table-18: Scroll Step Selection
0
0
D2
B
A
Figure 6-21 Horizontal Scrolling
0
0
0
↓
1
1
P1
B
1
0
B
D1
0
0
1
↓
1
1
Display width
0
0
D0
0
1
0
0
1
↓
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1
0
Number of pixels to
1
0
X
X
D2
0
scroll
X
N
Y
0
1
2
6
7
↓
Y
D1
1
Y
D0
0
M = 0
N = 0
LSB
Dot Matrix LCD Controller
RA8835A
www.raio.com.tw