ra8802 RAIO Technology Inc., ra8802 Datasheet - Page 7

• Manufacturer Part Number: ra8802
• Description: Character/graphic Lcd Controller
• Manufacturer: RAIO Technology Inc.

Version 1.3
4. Pin Definition
RAiO
4.1 MCU Interface
4.2 Driver Interface
TECHNOLOGY INC.
Pin name
Pin name
DISPOFF
DB[7..0]
(R/W#)
BUSY
CS1#
WR#
FRM
RD#
(EN)
CS2
XCK
INT
RS
YD
LP
I/O
I/O
I/O
O
O
O
O
O
O
O
I
I
I
I
Bi-direction 8 bit data bus connected to MCU data bus.
The high nibble DB[7..4] should be connected to GND when 4 bit data bus
mode is used.
Active low RD# signal when 8080 MCU is used.
Active high EN signal when 6800 series MCU are used.
Active low WR# signal when 8080 MCU is used.
The data are latched at the rising edge of the WR# signal.
The MCU data will be read from RA8802/8820 when R/W# is high and will
be written to RA8802/8820 when R/W# is low.
The MCU will access Instruction Register when RS is high and access
Data Register when RS is low.
Chip select pin.
The RA8802/8820 is active when CS1# is low and CS2 is high
Active high or low busy signal.
The RA8802/8820 can’t be access when BUSY pin is high.
It’s should be connected to MCU I/O input. The MCU have to poll this pin
before accessing RA8802/8820.
Normally inputs a frame inversion signal
The LCD driver output pin’s output voltage level can be set to the line latch
output signal and the FR signal
Shift clock signal for LCD driver IC.
Display off control signal used to control LCD power supply or backlight.
The pin is controlled by LCR bit 2. The status of this pin is the same as
LCR bit 2.
Connected to 6800 series MCU R/W# pin when 6800 MCU is used.
Register/Data select pin.
Usually connect to MCU address bus A0.
Interrupt signal
Active high or low Interrupt signal
LCD Driver control signal
YD will produce a pulse at the starting address of each Frame.
AC-converting signal input for LCD driver waveform.
For Column: Latch pulse input pin for display data
Data is latched on the falling edge of the clock pulse.
For Row: Bi-directional shift register shift clock pulse input pin
Data is shift on the falling edge of the clock pulse.
Data is shifted on the falling edge of the XCK.
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Description
Description
Character/Graphic LCD Controller
RA8802/8820
www.raio.com.tw