RA8816N
Preliminary Version 1.0
144x65 Character/Graphic LCD Driver
Pin Name
I/O
Description
Data Bit Select
BIT4 = 0 The parallel mode is use 8-bit data bus.
BIT4 = 1 The parallel mode is use 4-bit data bus (Default).
This pin must be kept high for serial mode.
Parallel/Serial Select
BIT4
I
P/ S
I
P/
S
= 0
DB[7:6].
P/ S = 1
The MPU interface is serial mode (Default). See the setting of
The MPU interface is parallel mode.
4-2 Clock and Power
Table 4-2
Pin Name
I/O
Description
Voltage Source of LCD Driver
The relationship of the power is VOUT>V0
≧
V1
≧
V2
≧
V3
≧
V4
≧
VSS
Capacitor Input
These are used to connect capacitors for internal Booster.
Booster Output
Reference Voltage Input
V0~V4
C[3:1]P, C[2:1]N
VOUT
O
I
O
VREF
I
This is the external reference voltage input when the internal one is
disabled.
VR
I
Voltage Adjustment
Applies voltage between V0 and VSS by connecting a resistor divider.
CLK_SEL
I
Clock Select
This pin is used to select the clock source. When CLK_SEL is “1”, the
clock is generated by internal RC oscillator. When CLK_SEL is “0”, the
system clock is driven 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 is not used and has to be connected to VDD or GND.
Power
Ground
EXT_CLK
VDD
VDDP
GND
GNDP
I
P
P
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