ra8835a RAIO Technology Inc., ra8835a Datasheet - Page 53

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

RAiO TECHNOLOGY INC.
Version 1.0
Internal/external character generator
selection
Character field
height
Internal CG ROM/RAM select
External CG ROM/RAM select
CG RAM bit 6 correction
CG RAM data storage address
External CG
7-15 CG Memory Allocation
Address
ROM
Note that there can be no more than 64 characters per bank.
Since the RA8835A series uses 8-bit character codes, it can handle no more than 256 characters at a
time. However, if a wider range of characters is required, character generator memory can be bank-
switched using the CGRAM ADR command.
Item
1 to 8 pixels
9 to 16 pixels
Greater than 16 pixels
192 characters or less
More than 192
characters
Figure 7-27: Internal and External Character Mapping
Table-21: Character Mapping
M0
M2 = 0
M2 = 1
Graphics mode (8 bits ´1 line)
Automatic
M1
Specified with CG RAM ADR
command
Other than the area of Figure
7-2A
Set SAG to F000H and overly
SAG and the CG ROM table
53/88
Parameter
Determined by the character
code
Can be moved anywhere in
the display memory address
space
Dot Matrix LCD Controller
Remarks
RA8835A
www.raio.com.tw