NJU6635
PRELIMINARY
16-CHARACTER 2-LINE DOT MATRIX LCD
CONTROLLER DRIVER
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GENERAL DESCRIPTION
The
NJU6635
is a 1Chip Dot Matrix LCD controller
driver for up to 16-character 2-line display with double
height function.
It contains microprocessor Interface circuits,
Instruction decoder controller, character generator
ROM/RAM and common and segment drivers.
The bleeder resistance generates for LCD Bias
voltage Internally.
The CR oscillator Incorporates C and R, therefore no
external components for oscillation are required.
The microprocessor Interface circuits which operate
2MHz frequency, can be connected directly to 4/8bit
microprocessor.
The character generator consists of 9,600 bits ROM
and 32 x 5 bits RAM. The standard version ROM is
coded with 240 characters including capital and small
letter fonts.
The 16-common and 80-segment drive up to
16-character 2-line LCD panel which divided two
common electrode blocks.
The rectangle outlook is very applicable to COG.
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PACKAGE OUTLINE
NJU6635CH
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FEATURES
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16-character 2-line Dot Matrix LCD Controller Driver
4/8 Bit Microprocessor direct Interface
Display Data RAM
:32 x 8 bits : Maximum 16-character 2line Display
Character Generator ROM
:9,600 bits ; 240 characters for 5 x 8 dots
Character Generator RAM
:32 x 5 bits ; 4 Patterns( 5 x 8 dots)
Microprocessor direst accessing to Display Data RAM and Character Generator RAM
High Voltage LCD Driver
:16-common / 80-segment
Duty Ratio
:1/16 Duty
Maximum Display Characters ; 32 Characters
Useful Instruction Set
Clear Display, Returns Home, Display ON/OFF Cont, Cursor ON/OFF Cont, Display Blink, Cursor Shift,
Character Shift, Double Height Function.
Power On Reset / Hardware Reset Function
Oscillation Circuit on chip
Bleeder Resistance on chip
Low Power Consumption
Operating Voltage --- +5V
Package Outline --- Bumped Chip
C-MOS Technology
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00/01/15
NJU6635
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TERMINAL DESCRIPTION
PAD No.
A mode
B mode
4–9
4–9
10 – 14
10 – 14
2
2
3
16
3
16
SYMBOL
V
DD
, V
SS
V
2
, V
3
, V
5
OSC
1
OSC
2
RS
I/O
–
–
I
O
I
FUNCTION
Power Source : V
DD
= +5V, GND : V
SS
= 0V
LCD driving Power Source
Oscillation Frequency Adjustment Terminals. Normally Open.
(Oscillation C and R are Incorporated, Osc Freq.=540kHZ)
Oscillation Frequency Adjustment Terminals. Normally Open.
This terminal also operates as the clock frequency monitor.
Resister selection signal Input
"0":Instruction Resister (Writing)
Busy Flag
(Reading)
"1":Data Register (Writing / Reading)
Read/Write selection signal Input
"0":Write "1":Read
Read/write activation Signal Input
3-state Data Bus(Upper) to transfer the data between MPU and
NJU6635.
DB
7
is also used for the Busy Flag reading.
3-state Data Bus(Lower) to transfer the data between MPU and
NJU6635.
In serial and 4bit parallel mode, these terminals are not used
and should be open.
LCD Common driving signal Terminals
LCD segment driving signal Terminals
Reset Terminal. When the “L” level Input over than 1.2ms to
this terminal, the system will be reset.(f
OSC
=540kHz)
Dummy Terminal
These terminals are electrically open.
17
18
26 – 23
17
18
26 – 23
R/W
E
DB
7
– DB
4
I
I
I/O
19 – 22
19 – 22
DB
3
– DB
0
I/O
32 – 39,
126 – 133
133 – 126,
39 – 32
43 – 122
15
122 – 43
15
COM
1
–
COM
16
SEG
1
–
SEG
80
RESET
O
O
I
O
DUMMY
1
1,
1,
–
27 – 31,
27 – 31,
DUMMY
15
40 – 42,
40 – 42,
123 – 125, 123 – 125,
134 – 137 134 – 137
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