ra8835 Topway Display, ra8835 Datasheet - Page 16

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

RAiO TECHNOLOGY INC.
Version 1.7
In graphics mode, the normal character field is also eight pixels. If a wider character field is used,
any remainder in the second eight bits is not displayed.
6-2-1-8 WF
Select the AC frame drive waveform period. WF is usually set to 1.
WF = 0: 16-line AC drive
WF = 1: two-frame AC drive
In two-frame AC drive, the WF period is twice the frame period.
In 16-line AC drive, WF inverts every 16 lines.
Although 16-line AC drive gives a more readable display, horizontal lines may appear when using
high LCD drive voltages or at high viewing angles.
6-2-1-9 FY
Set the vertical character size. The height in pixels is equal to FY + 1. FY can range from 00 to
0FH inclusive. Set FY to zero (vertical size equals one) when in graphics mode.
6-2-1-10 C/R
Set the address range covered by one display line, that is, the number of characters less one,
multiplied by the number of horizontal bytes per character. C/R can range from 0 to 239.
Address A
8 bits
FX
HEX
0E
00
01
07
0F
Address B
↓
↓
Table-4: Vertical Character Size Selection
Figure 6-6: FX and FY Display Addresses
8 bits
D
3
0
0
0
1
1
↓
↓
FY
D
2
0
0
1
1
1
↓
↓
D
1
0
0
1
1
1
↓
↓
16/86
D
0
0
1
1
0
1
↓
↓
Non-display area
[FY] character
height (pixels)
15
16
1
2
↓
8
↓
8 bits
FX
Dot Matrix LCD Controller
8 bits
www.raio.com.tw
RA8835