ra8803 RAIO Technology Inc., ra8803 Datasheet - Page 8

• Manufacturer Part Number: ra8803
• Description: Two Layers Character/graphic Lcd Controller Specification
• Manufacturer: RAIO Technology Inc.

Version 2.5
4. Pin Definition
RAiO
4-1 MPU Interface
4-2 LCD Driver Interface
TECHNOLOGY INC.
Pin Name
Pin Name
DB[7..0]
(WR#)
BUSY
(RD#)
R/W#
CS1#
FRM
CS2
INT
EN
RS
YD
I/O
I/O
I/O
O
O
O
O
I
I
I
I
This is an interrupt output to indicate the status of RA8803/88822. It could
be setup active high or low.
Data Bus
These are data bus for data transfer between MPU and RA8803/8822.
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
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
low.
When MPU I/F is 6800 series, this pin(R/W#) is used as data read/write
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
when RS is High.
Usually connect to MPU address bus A0.
Chip Select
The RA8803/8822 is active when CS1# is low and CS2 is high
Interrupt Signal
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
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.
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
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Two Layers Character/Graphical LCD Controller
Description
Description
RA8803/8822
www.raio.com.tw