ra8835 Topway Display, ra8835 Datasheet - Page 65

• Manufacturer Part Number: ra8835
• Description: Dot Matrix Lcd Controller
• Manufacturer: Topway Display

RAiO TECHNOLOGY INC.
Version 1.7
8-3 System Interconnection
8-3-1 System Diagram
converter
POFF
Supply
Power
processor
Micro-
V
REG
Address bus
Control bus
RESET
IORQ
processor
memory
Data bus
Micro-
Main-
WR
D0
D7
RD
A0
to
A1
To
A7
RESET
Decoder
V1
V2
V3
V4
V5
Figure 8-6: System Interconnection Diagram
RESET
CS
XD0
XD7
A0
RD
WR
To
Figure 8-5: System Block Diagram
RA8835
10MHz crystal
XG
Character
generator
RA8835
VA13
VA15
VCE
VRD
VA12
VD0
VD7
Address
VA0
Display
XD
control
control
To
To
Driver
To
LAT
INH
YSCL
FR
DI
A0 to A12
65/86
HC138
D0 to D7
A
B
C
(RAM1)
Display memory
Display memory
Y7
Y6
Y0
Address bus
data bus
to
Y drive
CS7
CS6
CS0
WE
CS1
CS2
OE
to
LCD UNIT
EI
FR
X drive
A0 to A12
D0 to D7
(RAM2)
E0
Display memory
WE
CS1
CS2
OE
X drive
LCD panel
Generator memory
EI
FR
Exter character
A0 to A11
(CGROM)
D0 to D7
LCD
Dot Matrix LCD Controller
Drive bus
E0
CE
OE
X drive
LCD unit
www.raio.com.tw
EI
FR
RA8835
E0