ra8825 RAIO Technology Inc., ra8825 Datasheet - Page 3

• Manufacturer Part Number: ra8825
• Description: 128x33 Dot Matrix Lcd Driver
• Manufacturer: RAIO Technology Inc.

Preliminary Version 1.1
RAiO TECHNOLOGY INC.
COM5
COM6
COM7
COM8
COM9
COM10
COM11
COM12
COM13
COM14
COM15
The RA8825 consists of Display RAM, Command Registers, LCD Controller, LCD Driver, Voltage Booster,
Voltage Regulator, MPU Interface and Key-Scan circuit.
10
11
1
2
3
4
5
6
7
8
9
TEST[2..0]
EL_CHRG
EL_DCHG
CLK_SEL
EXT_CLK
WR(R/W)
KST[3..0]
KIN[4..0]
Logo
D/C(RS)
DB[0:7]
RD(EN)
IO[7..0]
S[1:0]
BIT4
RST
C86
P/S
INT
CS
FG
C[2:1]P C[2:1]M V0~V4 VLCD
P1
Oscillator
Key Scan
Control
Circuit
Test &
Power
Block
Block
& INT
GPIO
MPU
RC
I/F
(8758µm x 1148 µm )
Register
5. Block Diagram
Booster
Voltage
RA8825
Block
Top View
3/6
(0, 0)
SEG0~SEG127
Display RAM + Buffer
Y
Segment
Drivers
Control
Cursor
Regulator
128
Voltage
528bytes
X
LCDC Control Block
Driver I/F
Control
Scroll
COM0~COM31
Follower
Common
Voltage
Drivers
Control
33
Scan
128x33 Graphic LCD Driver
COMS_A[1:0]
COMS_B[1:0]
www.raio.com.tw
RA8825
VREF
P2
116
115
114
113
112
111
110
109
108
107
106
COM23
COM24
COM25
COM26
COM27
COM28
COM29
COM30
COM31
COMS_B0
COMS_B1