ra8835a RAIO Technology Inc., ra8835a Datasheet - Page 17

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

RAiO TECHNOLOGY INC.
Version 1.0
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.
For example, if the character width is 10 pixels, then the address range is equal to twice the
number of characters, less 2. See Section 17-1-1 for the calculation of C/R. [C/R] cannot be set to
a value greater than the address range. It can, however, be set smaller than the address range, in
which case the excess display area is blank. The number of excess pixels must not exceed 64.
HEX
EE
EF
00
01
4F
↓
↓
D7
0
0
↓
0
↓
1
1
D6
0
0
↓
1
↓
1
1
HEX
0E
00
01
07
0F
↓
↓
Table-4: Vertical Character Size Selection
D5
0
0
↓
0
↓
1
1
Table-5: Display Line Address Range
C/R
D
3
0
0
↓
0
↓
1
1
D4
0
0
↓
0
↓
0
0
FY
D
2
0
0
↓
1
↓
1
1
D3
0
0
↓
1
↓
1
1
D
1
0
0
1
1
1
↓
↓
D2
0
0
↓
1
↓
1
1
17/88
D
0
0
1
↓
1
↓
0
1
D1
0
0
↓
1
↓
1
1
D0
0
1
↓
1
↓
0
1
[FY] character
height (pixels)
[C/R] bytes per display line
15
16
1
2
8
↓
↓
239
240
80
1
2
↓
↓
Dot Matrix LCD Controller
RA8835A
www.raio.com.tw