ra8835a RAIO Technology Inc., ra8835a Datasheet - Page 74

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

RAiO TECHNOLOGY INC.
Version 1.0
8-6 16 x 16-dot Graphic Display
8-6-1 Command Usage
8-6-2 Kanji Character Display
This example shows how to display 16 x 16-pixel characters. The command sequence is as
follows:
The program for writing large characters operates as follows:
CSRW
CSRDIR Set the cursor auto-increment direction.
MWRITE Write to the display memory.
1. The microprocessor reads the character data from its ROM.
2. The microprocessor sets the display address and writes to the VRAM. The flowchart is
Data held in the microprocessor memory
shown in Figure 8-13.
CH
DH
0H
1H
2H
3H
4H
5H
6H
7H
8H
9H
AH
BH
EH
FH
O
Set the cursor address.
8
O
1st column
7
O
A
6
(11)
(13)
(15)
(17)
(19)
(21)
(23)
(25)
(27)
(29)
(31)
0
(1)
(3)
(5)
(7)
(9)
Figure 8-11: Graphics Address Indexing
O
= 0
(19)
(17)
(15)
(13)
(11)
5
(6)
(4)
(2)
(9)
(7)
(5)
(3)
(1)
O
4
O
3
O
2
O
1
O
8
O
7
O
74/88
memory area
2nd column
6
1st column
memory area
Data written into the RA8835 display memory
O
2nd column
A
0
5
(10)
(12)
(14)
(16)
(18)
(20)
(22)
(24)
(26)
(28)
(30)
(32)
(2)
(4)
(6)
(8)
= 1
O
4
O
3
O
2
O
1
(4)
(2)
(3)
(1)
(n) shows the CG ROM
data readout order
Dot Matrix LCD Controller
RA8835A
www.raio.com.tw