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PDF RA8815 Data sheet ( Hoja de datos )
| Número de pieza | RA8815 | |
| Descripción | 128x33 Character/Graphic LCD Driver | |
| Fabricantes | RAIO Technology | |
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RAiO
RA8815
128x33 Character/Graphic
LCD Driver
Specification
Version 2.2
July 1, 2006
RAiO Technology Inc.
@Copyright RAiO Technology Inc. 2005, 2006
RAiO TECHNOLOGY INC.
1/63
www.raio.com.tw
1 page  
Preliminary Version 2.2
RA8815
128x33 Character/Graphic LCD Driver
1. General Description
The RA8815 is a Dot-Matrix LCD Driver that supports both character and graphic mode. It built-in a
256Kbyte character ROM that consists of Chinese, English and ASCII fonts. The embedded 528Byte display
RAM supports up to 128x33 dots LCD panel. The RA8815 also provides a scrolling buffer memory for
scrolling functions. It supports up, down, left and right scrolling features, and all of the scrolling is execute by
hardware.
In character mode, the RA8815 supports Chinese BIG5 code or GB code. The system(MPU) does not need
take a lot of time to show the Chinese font in graphic mode. It also provides small ASCII(8x8) and big
ASCII(8x16) font for English character, Japanese, European and Latin. The RA8815 integrates much
powerful hardware that including Contrast adjustment, 4x5 Key-Scan, eight General Purpose I/O and EL
Backlight signals for EL driver.
The RA8815 is a high integration chip of LCD Controller. It reduce a lot of time for system develop, and save
much cost for hardware system that due to it provides many features for related LCD display application.
2. Feature
Support both Character and Graphic Mode
Support 8080/6800 8/4-bit Parallel Interface
and 3-Wire/4-Wire Serial Interface
Built-in 256KB Font ROM: Chinese, English,
ASCII, Japanese, Latin, Latin-ext A, Latin-ext
B
Support ASCII 8x8/8x16 Half Size Font,
16x16 Full Size Chinese Font
Support Maximum 128Seg x 33Com LCD
Panel. 2 x 8 Chinese Fonts(16x16), or 4 x 16
English Fonts(8x8)
Built-in 528 Bytes Display RAM and 354Byte
Scrolling Buffer
Built-in 2X~3X(Voltage Booster), Voltage
Regulator, Voltage Follower
Support 1/33 Duty, 1/6~1/4 Bias Panel
Eight General Purpose I/O
Built-in 4x5 Key-scan Circuit
Support Horizontal/Vertical Scrolling Functions
Built-in 256Byte SRAM for Create Font
Provide Signals for EL Driver
Provide 32-Steps Contrast Adjust
Build-in RC Oscillator
Voltage Operation: Chip 2.5~3.6V，COG
Module 2.7~3.8V
Package: Gold Bump Die
3. Block Diagram
The RA8815 is consist of Display RAM, 256Kbyte Font ROM, Command Registers, LCD Controller, LCD
Driver, Voltage Booster, Voltage Regulator, MPU Interface and Key-Scan circuit.
MPU
G PIO
RA8815
4x5
Key Scan
LCD Panel
EL Back
L ig h t
D river
RAiO TECHNOLOGY INC.
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www.raio.com.tw
5 Page 
Preliminary Version 2.2
RA8815
128x33 Character/Graphic LCD Driver
IR (Index Register)
RW RS DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 0 ID4 ID3 ID2 ID1 ID0
ID[4:0]: These bits are used to store the register number that MPU want to access on next cycle.
The ID[[4:0] provide 32 register number(00h~1Fh). But currently the RA8815 only used 25 registers
(00h~18h). All of these registers are be initially to “00h” after RESET.
Memory Data (RAMD)
RW RS DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0/1 1 D7 D6 D5 D4 D3 D2 D1 D0
If RS is “1”, It means MPU execute the Memory Cycle for RA8815. When RW is “0”, MPU will write data to
Display RAM or ICON RAM that according the setting of MD[1:0](REG[03h] bit1-0). For example, MPU
write Big5/CG code to memory in Text Mode, or write bitmap data to display memory in Graphic mode.
When RW is “1”, the MPU read data from different paths of RA8815. It depend on the operation mode as
following:
1. Full Size Text Mode: From up to down of Left side(16-Bytes), and then up to down of Right
side(16-Bytes), total is 32-Bytes.
2. Half Size Text Mode: From up to down, total 16-Bytes data.
3. Small ASCII Text Mode: From up to down, total 8-Bytes data.
4. Graphics Mode: From left to right, each reading is one byte(8-Pixels).
[00h] Driver Waveform Register (DWFR)
RW
DB7
DB6
DB5
0 B/C -- NW5
DB4
NW4
DB3
NW3
DB2
NW2
DB1
NW1
DB0
NW0
B/C: Select waveform of drive. 0 B-Type waveform. 1 C-Type waveform.
NW[5:0]: These bits are used to assign the Segment/Row number that when internal Frame signals can to
it and want to change the state. This function support only when B/C is “1” (C-Type wave form).
[01h] Power Control Register (PWRR)
RW
DB7
DB6
DB5
0 SRST MCLR --
DB4
--
DB3
KWK
DB2
DB1
IOWK DOFF_Z
DB0
SLP
SRST: S/W reset. 1 All of the register will be initialed again except the display memory. 0 No action.
MCLR: Clear memory. 1 Clear the Display RAM data to “00h”. 0 No action. If both MCLR and SRST
set to ”1” then RA8815 will clear the display RAM and then Reset.
KWK: Key-scan wake up Setting. 0 Key-scan Wake up function off. 1 Key-scan wake up function on.
IOWK: I/O wake up Setting. 0 IO port wake up function off. 1 IO port wake up function on.
DOFF_Z: Display off. 0 LCD driver and display off. 1 LCD driver and display on.
SLP: Sleep mode setting. 1 Enter sleep mode, and turn off the clock. 0 RA8815 wake up. This bit
was clear to “0” when wake up from I/O port or Key-scan.
[02h] System Register (SYSR)
RW DB7 DB6
0 LS3 LS2
DB5
LS1
DB4
DB3
DB2
LS0 GB_EN
--
DB1
RS1
LS[3:0]: Setup the segment number. The maximum segment of RA8815 is 128.
DB0
RS0
RAiO TECHNOLOGY INC.
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www.raio.com.tw
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet RA8815.PDF ] | |
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