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PDF NJU6635 Data sheet ( Hoja de datos )
| Número de pieza | NJU6635 | |
| Descripción | 16-CHARACTER 2-LINE DOT MATRIX LCD CONTROLLER DRIVER | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJU6635 (archivo pdf) en la parte inferior de esta página. Total 33 Páginas | ||
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NJU6635
PRELIMINARY
16-CHARACTER 2-LINE DOT MATRIX LCD
CONTROLLER DRIVER
s GENERAL DESCRIPTION
s PACKAGE OUTLINE
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.
NJU6635CH
s FEATURES
q 16-character 2-line Dot Matrix LCD Controller Driver
q 4/8 Bit Microprocessor direct Interface
q Display Data RAM
:32 x 8 bits : Maximum 16-character 2line Display
q Character Generator ROM
:9,600 bits ; 240 characters for 5 x 8 dots
q Character Generator RAM
:32 x 5 bits ; 4 Patterns( 5 x 8 dots)
q Microprocessor direst accessing to Display Data RAM and Character Generator RAM
q High Voltage LCD Driver
:16-common / 80-segment
q Duty Ratio
:1/16 Duty
q Maximum Display Characters ; 32 Characters
q Useful Instruction Set
Clear Display, Returns Home, Display ON/OFF Cont, Cursor ON/OFF Cont, Display Blink, Cursor Shift,
Character Shift, Double Height Function.
q Power On Reset / Hardware Reset Function
q Oscillation Circuit on chip
q Bleeder Resistance on chip
q Low Power Consumption
q Operating Voltage --- +5V
q Package Outline --- Bumped Chip
q C-MOS Technology
00/01/15
1 page  
NJU6635
s TERMINAL DESCRIPTION
PAD No.
A mode B mode
4–9
4–9
10 – 14 10 – 14
22
SYMBOL
VDD, VSS
V2, V3, V5
OSC1
I/O
–
–
I
3
3
OSC2
O
16 16 RS I
17 17 R/W I
18 18
EI
26 – 23 26 – 23 DB7 – DB4 I/O
19 – 22 19 – 22 DB3 – DB0 I/O
32 – 39, 133 – 126,
126 – 133 39 – 32
43 – 122 122 – 43
15 15
COM1 –
COM16
SEG1 –
SEG80
RESET
1,
27 – 31,
40 – 42,
123 – 125,
134 – 137
1,
27 – 31,
40 – 42,
123 – 125,
134 – 137
DUMMY1
–
DUMMY15
O
O
I
O
FUNCTION
Power Source : VDD = +5V, GND : VSS = 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.
DB7 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.(fOSC=540kHz)
Dummy Terminal
These terminals are electrically open.
5 Page 
NJU6635
(2)Power on Initialization by internal circuits
(2-1) Initialization By internal Reset circuits
The NJU6635 is initialized automatically by the internal power on initialization circuits when the power
is turned on. In the internal power on initialization, following instructions are executed.
During the internal power on initialization, the busy flag (BF) is “1” and this status is kept 10ms after
VDD = 4.5V.
Initialization flow is shown below:
Clear Display
Function Set
DL=1
A=0
M0=0
M1=0
E=0
:8-bit long interface data
:Addressing mode 1
:A mode
:32-character 1-line
:Normal Display mode
Display On/Off
Control
D=0 :Display Off
C=0 :Cursor Off
B=0 :Cursor Blink Off
Entry Mode Set
I/D=1 :Increment by 1
S=0 :No Shift
Note) If the condition of power supply rise time described in the Electrical Characteristics is not satisfied, the
internal Power on initialization Circuits will not operate and initialization will not be performed.
In this case, the initialization by MPU software is required.
(2-2) Initialization By Hardware
The NJU6635 incorporates RESET terminal to initialize the all system. When the “L” level input over
than 1.2ms to the RESET terminal, the reset sequence is executed. In this time, the busy signal output
during 10ms after RESET terminal goes to “H”.
• RESET operation
RESET
System clock
C
Q
Counter
RST
CQ
RST
RS-F/F
System RESET
Power No
RESET
• Operation timing
External Reset
Signal
Over 1.2ms
Counter Output
RS-F/F Output
Internal Reset
Signal
BUSY
10ms
11 Page | ||
| Páginas | Total 33 Páginas | |
| PDF Descargar | [ Datasheet NJU6635.PDF ] | |
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