RA8872L3N 데이터 시트보기 (PDF) - RAIO
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RA8872L3N Datasheet PDF : 7 Pages
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Version 1.1 Brief Specification
RA8872
Character/Graphic TFT LCD Controller
4-1 MCU Interface
4. Pin Definition
Pin Name
DB[0:7]
RD# / EN
WR# / RW#
CS#
I/O Pin#
Pin Description
14, 15,
IO 19~ Data Bus
24 These are data bus for data transfer between MCU and RA8872.
Enable/Read Enable
When MCU interface (I/F) is 8080 series, this pin is used as data
I
9 read (RD#), active low.
When MCU I/F is 6800 series, this pin is used as Enable (EN),
active high.
Write/Read-Write
When MCU I/F is 8080 series, this pin is used as data write (WR#),
I 10 active low.
When MCU I/F is 6800 series, this pin is used as data read/write
control (RW#). Active high for read and active low for write.
Chip Select Input
I
11 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.
RS
C86
INT#
WAIT#
I
12 In 8080 interface, usually it connects to “A0” address pin.
RS
WR#
Access Cycle
0
0
Data Write
0
1
Data Read
1
0
CMD Write
1
1
Status Read
MCU Interface Select
I 13 0 : 8080 interface is selected.
1 : 6800 interface is selected.
Interrupt Signal Output
O 37
The interrupt output for MCU to indicate the status of RA8872.
Wait Signal Output
This is a WAIT output to indicate the RA8872 is in busy state. The
O 36 RA8872 can’t access MCU cycle when WAIT# pin is active. It is
active low and could be used for MCU to poll busy status by
connecting it to I/O port.
RAiO TECHNOLOGY INC.
4/7
www.raio.com.tw
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