RA8803 Ver la hoja de datos (PDF) - RAIO
Número de pieza
componentes Descripción
Lista de partido
RA8803 Datasheet PDF : 8 Pages
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Version 2.1
SYS_MI
SYS_DB
OPM0
OPM1
4.5 Power
Pin Name
VDD5
VDD3
RA8803/8822
Two Layers Character/Graphical LCD Controller
Pull High(1) : 8-Bit
When SYS_DW is Pull Low, then the LCD driver data bus Is 4-Bit.
When SYS_DW is Pull High, then the LCD driver data bus is 8-Bit.
MPU Type Select
This pin is used to select MPU type:
Pull Low(0) : I8080 Series
I
Pull High(1) : M6800 Series
When SYS_MI is Pull Low, then the MPU Interface of RA8803/8822 is
suppported I8080.
When SYS_MI is Pull High, then the MPU Interface of RA8803/8822 is
supported M6800.
8080 MPU Data Bus Select
This pin is used to select data bus of 8080 MPU is 4-Bitor 8-Bit:
Pull Low(0) : 4-Bit
I
Pull High(1) : 8-Bit
When SYS_DB is Pull Low, then the 8080 MPU Interface of RA8803/8822
is supported 4-Bit.
When SYS_DB is Pull High, then the 8080 MPU Interface of RA8803/8822
is supported 4-Bit.
Operation Status of Current Command
These two pins are the feedback from RA8803/8822 while MPU release a
Read or Write command to RA8803/8822. The MPU could know the status
of RA8803/8822.
OPM0 OPM1
State
O
1
0
MPU is reading data from RA8803/8822.
1
1
MPU is writing data to RA8803/8822.
RA8803/8822 did not receive command or read
0
X
a valid commend.
Normally the system does not need to use these two pins. And keep
floating for not use.
I/O
Description
5V Power
I
This is the input of 5V to 3.3V DC to DC Converter. If it connects to 5V
power then the pin VDD3 will generate 3.3V power for internal cells and
external device.
3.3V Power
I/O
If the pin VDD5 connects to 5V power then this pin will generate 3.3V
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