ra8806 RAIO Technology Inc., ra8806 Datasheet - Page 84

• Manufacturer Part Number: ra8806
• Description: Two Layers Character/graphic Lcd Controller
• Manufacturer: RAIO Technology Inc.

Preliminary Version 1.2
RAiO
6-11 User-Defined Font
TECHNOLOGY INC.
6-11-1 Create Font in CGRAM
The RA8806 embedded a 512Byte CGRAM for user to create new character. The user could create
font, special symbol or pattern in this memory. If user only uses one DDRAM, then the other one could
also use as CGRAM.
Therefore, the RA8806 provides 3 regions for user to create new character(symbol or pattern) as
following:
1. 512 Bytes CGRAM
2. 9.6K Bytes DDRAM1 (When user only shows DDRAM2 data on screen)
3. 9.6K Bytes DDRAM2 (When user only shows DDRAM1 data on screen)
Half-Size
Half-Size
Full-Size
Full-Size
Code
Code
The CGRAM is a 512Byte RAM, so it could create 32 Half-Size or 16 Full-Size characters. The
Table 6-32 is the font code mapping table in CGRAM. Note the font codes were fix in RA8806. And
the Font# was defined in Bit[3:0] of REG[CURY].
DDRAM1
DDRAM2
Font#
Font#
CGRAM
Region
8F00
8F10
9F00
9F08
0
8
8F01
8F11
9.6 Kbytes
9.6 Kbytes
512 bytes
Size
8F02
8F12
Table 6-32 : CGRAM Font Code Mapping Table
9F01
9F09
Table 6-31 : Font Code for User-Created
1
9
8F03
8F13
8F04
8F14
Half-Size : 8F00h ~ 8F1Fh
Half-Size : 8000h ~ 8E27h
Half-Size : 8000h ~ 8E27h
Full-Size : 9F00h ~ 9F0Fh
Full-Size : 9000h ~ 9E13h
Full-Size : 9000h ~ 9E13h
9F0A
9F02
10
2
8F05
8F15
Code and Range
8F16
8F06
9F0B
9F03
84/184
11
3
8F17
8F07
Two Layers Character/Graphic LCD Controller
8F18
8F08
9F0C
9F04
12
4
8F19
8F09
8F0A
8F1A
9F0D
9F05
13
5
600 Half-Size chars
600 Half-Size chars
300 Full-Size chars
300 Full-Size chars
8F1B
32 Half-Size chars
8F0B
16 Full-Size chars
Capacity
8F0C
8F1C
9F0E
9F06
14
6
8F0D
8F1D
www.raio.com.tw
8F0E
8F1E
9F07
9F0F
RA8806
15
7
8F0F
8F1F