RA8822 Ver la hoja de datos (PDF) - RAIO
Número de pieza
componentes Descripción
Fabricante
RA8822 Datasheet PDF : 8 Pages
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Version 2.1
RA8803/8822
Two Layers Character/Graphical LCD Controller
KR[7..0]
KC[7..0]
IOUT
LPF
XA
XB
8x8
Key Scan
5 Bit
DAC
240x160x2 (Two Page)
DISPLAY DATA SRAM
(4.8KByte x 2)
REGISTER CIRCUIT
DISPLAY
TIMING
GENERATOR
CIRCUIT
PLL
CIRCUIT
512KB
FONT
ROM
512B
FONT
SRAM
MCU INTERFACE CIRCUIT
SYSTEM CONFIGURE
CIRCUIT
10 Bit
ADC
LP
FRM
YD
DISPOFF
XCK
LD[7..0]
X1
X2
Y1
Y2
4.1 MPU Interface
Pin Name
DB[7..0]
EN
(RD#)
R/W#
(WR#)
Figure 3-2: RA8822 Block Diagram
4. Pin Definition
I/O
Description
Data Bus
These are data bus for data transfer between MPU and RA8803/8822.
I/O
The high nibble DB[7..4] should be floating when 4-bit data bus mode is
used.
Enable/Read Enable
When MPU I/F is 8080 series, this pin (RD#) is used as data read, active
I
low.
When MPU I/F is 6800 series, this pin (EN) is used as Enable, active high.
Write/Read-Write
When MPU I/F is 8080 series, this pin (WR#) is used as data write, active
I
low.
When MPU I/F is 6800 series, this pin(R/W#) is used as data read/write
RAiO TECHNOLOGY INC.
4/8
www.raio.com.tw
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