NJU6678
PRELIMINARY
104-common x 132-segment
BIT MAP LCD DRIVER
GENERAL DESCRIPTION
The NJU6678 is a bit map LCD driver to display graphics or charac-
ters. It contains 21,120 bits display data RAM, microprocessor inter-
face circuits, instruction decoder, 132-segment and 104-common driv-
ers.
The bit image display data is transferred to the display data RAM by
serial or 8-bit parallel interface.
The NJU6678 displays 104 x 132 dots graphics or 8-character 6-line
by 16 x 16 dots character.
It oscillates by built-in OSC circuit without any external components.
Furthermore, the NJU6678 features Partial Display Function which
creates up to 2 blocks of active display area and optimizes duty cycle
ratio. This function sets optimum boosted voltage by the combination
with both of programmable 5-time voltage booster circuit and 201-
step electrical variable resistor. As result, it reduces the operating cur-
rent.
The operating voltage from 2.5V to 3.3V and low operating current are
useful for small size battery operating items.
FEATURES
Direct Correspondence between Display Data RAM and LCD Pixel
Display Data RAM - 21,120 bits (1.5 times over than display size)
236 LCD Drivers - 104-common and 132-segment
Direct Microprocessor Interface for both of 68 and 80 type MPU
Serial Interface
Partial Display Function
(2 blocks of active display area and automatic duty cycle ratio selection)
Easy Vertical Scroll by the variable start line address and over size display data RAM
Programmable Bias selection ; 1/4,1/5,1/6,1/7,1/8,1/9,1/10,1/11 bias
Common Driver Order Assignment by mask option
Version
NJU6678A
NJU6678B
C
0
to C
103
(Pin name)
Com
0
to Com
103
Com
103
to Com
0
PACKAGE OUTLINE
NJU6678CL
Useful Instruction Set
Display Data Read/Write, Display ON/OFF Cont, Inverse Display, Page Address Set,
Display Start Line Set, Partial Display, Bias Select, Column Address Set, Status Read,
All On/Off, Voltage Booster Circuits Multiple Select(Maximum 5-time), n-Line Inverse,
Read Modify Write, Power Saving, ADC Select, etc.
Power Supply Circuits for LCD; Programmable Voltage Booster Circuits(5-time Maximum),
Regulator, Voltage Follower x 4
Precision Electrical Variable Resistance
Low Power Consumption
Operating Voltage
Package Outline
C-MOS Technology
--- 2.5V to 3.3V
--- COF / TCP / Bumped Chip
Mar.2000
Ver.2.1
LCD Driving Voltage --- 6.0V to 17V
电源技术
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