ra8825 RAIO Technology Inc., ra8825 Datasheet - Page 5

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

Preliminary Version 1.1
5-2 LCD Panel Interface
5-.3 Clock and Power
RAiO TECHNOLOGY INC.
SEG0 ~ SEG127
COM0 ~ COM31
COMS_A[1:0]
COMS_B[1:0]
Pin Name
C1P, C1M
C2P, C2M
Pin Name
EXT_CLK
CLK_SEL
V0~V4
VLCD
VREF
BIT4
P/ S
I/O
O
O
O
I/O
O
O
I
I
I
I
I
I
I
I
Segment Signals for Panel
Common Signals for Panel
Icon Common Signals for Panel
Capacitor Input
These are used to connect a capacitor for internal Booster.
Capacitor Input
These are used to connect a capacitor for internal Booster.
Clock Select
This pin is used to select the clock source. When CLK_SEL “1”, the clock
is generated by internal RC oscillator. When CLK_SEL is “0”, the system
clock is drive by external pin - EXT_CLK.
External Clock
When CLK_SEL is “0”, this pin is the external clock input. When
CLK_SEL is “1”, this pin do not used and has to connect VDD or GND.
MPU Select
Connect this pin to VDD for serial mode.
Data Bit Select
BIT4 = 0
BIT4 = 1
Connect this pin to VDD for serial mode.
Parallel/Serial Select
P/ S = 0
DB[7:6].
P/ S = 1
Voltage Source of LCD Driver
The relationship of the power is VLCD>V0≧V1≧V2≧V3≧V4≧VSS。
These pins have to add external 0.1uF~1uF capacitor to GND.
Booster Output
Reference Voltage Input
This is the refeence voltage input when use an external regulator.
Normally keep this pin floating, if connect this signal to FPC then have to
add a 0.1uF capacitor to GND.
C
C
86
86
= 0
= 1
The parallel mode is use 8-bit data bus.
The parallel mode is use 4-bit data bus(Default).
The MPU interface is 8080 series.
The MPU interface is 6800 series(Default).
The MPU interface is parallel mode.
The MPU interface is serial mode(Default). See the setting of
5/6
Description
Description
128x33 Graphic LCD Driver
www.raio.com.tw
RA8825