RA8875L3N 查看數據表（PDF） - RAIO
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RA8875L3N Datasheet PDF : 9 Pages
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Version 1.0
RA8875
Character / Graphic TFT LCD Controller
5 Pin Definition
5-1 MPU Interface
Pin Name
DB[15:0]
RD#
(EN)
WR#
(RW#)
CS#
RS
I/O Pin Description
Data Bus
These are data bus for data transfer between MPU and RA8875.
IO
When setting register number and register data, DB[7:0] is used.
When writing data to display RAM, DB[15:0] is used according to data
bus mode setting. DB[15:8] will be input and should be pull-low or
pull-high when 8-bits data bus mode is used.
Enable/Read Enable
When MPU interface (I/F) is 8080 series, this pin is used as RD# signal
I (Data Read) , active low.
When MPU I/F is 6800 series, this pin is used as EN signal (Enable),
active high.
Write/Read-Write
When MPU I/F is 8080 series, this pin is used as WR# signal (data write) ,
I active low.
When MPU I/F is 6800 series, this pin is used as RW# signal (data
read/write control) . Active high for read and active low for write.
I
Chip Select Input
Low active chip select pin.
Command / Data Select Input
The pin is used to select command/data cycle. RS = 0, data Read/Write
cycle is selected. RS = 1, status read/command write cycle is selected.
In 8080 interface, usually it connects to “A0” address pin.
I
RS
WR#
Access Cycle
0
0
Data Write
0
1
Data Read
1
0
CMD Write
1
1
Status Read
C86
PS
INT#
WAIT#
MPU Interface Select
I 0: 8080 interface is selected
1: 6800 interface is selected
Parallel /Serial I/F Select Input
0: Parallel 8080/6800 I/F select
1: Serial 3/4-wire SPI or IIC I/F select.
I PS input is used to select the active MCU interface, it must be set
correctly before the command /data cycle asserting. We also recommend
that DB[15:0], RD#(EN) , WR#(RW#) ,CS# and RS pin tie to low or high
when using serial I/F.
O
Interrupt Signal Output
The interrupt output for MPU to indicate the status of RA8875.
Wait Signal Output
O
This is a WAIT# output to indicate the RA8875 is in busy state. The
RA8875 can’t access MPU cycle when WAIT# pin is active. It is active low
and could be used for MPU to poll busy status by connecting it to I/O port.
RAiO TECHNOLOGY INC.
4/9
www.raio.com.tw
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