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
RS
CS1#
CS2
INT
BUSY
RA8803/8822
Two Layers Character/Graphical LCD Controller
control. Active high for read and active low for write.
Register/Memory Select
The MPU will access Register when RS is Low and access Data Memory
I
when RS is High.
Usually connect to MPU address bus A0.
Chip Select
I
The RA8803/8822 is active when CS1# is low and CS2 is high
Interrupt Signal
O This is an interrupt output to indicate the status of RA8803/88822. It could
be setup active high or low.
Busy Signal
This is a busy output to indicate the RA8803/88822 is in busy state. It
could be setup active high or low. If setup active high, the RA8803/8822
O
can’t be access when BUSY pin is high.
It’s should be connected to MPU I/O input. The MPU have to poll this pin
before accessing RA8803/8822.
4.2 LCD Driver Interface
Pin Name
I/O
YD
O
FRM
O
LP
O
XCK
O
DISPOFF
O
LD[7..0]
O
Description
Start Signal of LCD Per Frame
YD is the frame start signal.
Control Signal of LCD AC Wave
This signal controlt the Level Shift of LCD driver. Normally inputs a frame
inversion signal.
LCD Common Latch
This is a latch signal for LCD driver to latch the Common data.
LCD Clock
This is a shift clock signal for LCD driver.
LCD Display OFF
This signal is used to control the LCD Display ON or OFF.
LCD Driver Data Bus
When 8-bit LCD driver IC is used. LD[7..0] are connected to LCD driver
data bus. When 4-bit CPU is used, LD[3..0] are connected to LCD driver
data bus, but LD[7..4] are non-connected.
4.3 Clock Interface
Pin Name
LPF
I/O
Description
Low Pass Filter Input
I
This is a low pass filter input. Please refer the circuit of application note.
RAiO TECHNOLOGY INC.
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www.raio.com.tw
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