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PDF NJU6624C Data sheet ( Hoja de datos )
| Número de pieza | NJU6624C | |
| Descripción | 14-CHARACTER 1-LINE DOT MATRIX LCD CONTROLLER DRIVER with SMOOTH SCROLL FUNCTION | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJU6624C
PRELIMINARY
14-CHARACTER 1-LINE DOT MATRIX LCD
CONTROLLER DRIVER with SMOOTH SCROLL FUNCTION
gGENERAL DESCRIPTION
The NJU6624C is a Dot Matrix LCD controller driver for 14-character 1-
line with icon display in single chip.
It contains bleeder resistance, general output port, keyscan circuit,
CR oscillator, microprocessor interface circuit, instruction decoder con-
troller, character generator ROM/RAM, high voltage operation com-
mon and segment drivers, and others.
The character generator ROM consisting of 7,840 bits stores 224 kinds
of character Font. Each 1,120 bits CG RAM and Icon display RAM
can store 32 kinds of special character displayed on the dot matrix
display area or 70 kinds of Icon on the Icon display area.
The 8-common (7 for character, 1 for icon) and 70-segment drivers
operate 14-character 1-line with 70 Icon LCD display and LED driver
drives 4 LED which can use like as indicator.
The 16th display contrast control function is incorporated. Therefore,
the contrast adjustment is operated easily by only simple power sup-
ply circuit on-chip.
The complete CR oscillator requires no external components.
The serial interface which operates by 1MHz, communicates with ex-
ternal MCU.
gPACKAGE OUTLINE
NJU6624CFG1
gFEATURES
n 14-character 1-line Dot Matrix LCD Controller Driver
n Maximum 70 Icon Display
n Serial Direct Interface with Microprocessor
n Display Data RAM
- 14 x 8 bits : Maximum 14-character 1-line Display
n Character Generator ROM
n Character Generator RAM
n Icon Display RAM
- 7,840 bits : 224 Characters for 5 x 7 Dots
- 1,120 bits : 32 Patterns( 5 x 7 Dots )
- Maximum 70 Icons
n High Voltage LCD Driver
n Duty and Bias Ratio
n Useful Instruction Set
: 8-common / 70-segment
: 1/8 duty, 1/4 bias
: Clear Display, Address Home, Display ON/OFF Cont., Display Blink,
Address Shift, Character Shift, Keyscan ON/OFF Cont. e.t.c.
n 32Key Input (4x8 keyscan)
n General output port (4 ports)
n Power On Initialization / Hardware Reset
n Bleeder Resistance on-chip
n Software contrast control(16 step)
n Oscillation Circuit on-chip
n Low Power Consumption
n Operating Voltage --- 2.4 to 5.5 V
n Package Outline --- QFP 100
n C-MOS Technology
Mar.2000
Ver.1
1 page  
NJU6624C
Table 2. CG ROM Character Pattern ( ROM version -02 )
5 Page 
NJU6624C
(2)Power on Initialization by internal circuits
(2-1)Initialization By Internal Reset Circuits
The NJU6624C is automatically initialized by 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 1.5ms (fosc=145kHz) after VDD
rises to 2.4V. Initialization flow is shown below:
Display ON/OFF control
Entry mode set
D=0 :Display Off
M=0 :Icon Off
B=0 :Cursor Blink Off
I/D=1 :Increment by 1
S=0 :No Shift
Set static port
P3-P0=0000 :All static port output signal is ”L”.
Contrast control
Set Display mode
Clear Display
E.V.R. Value=0000 : VLCD Low
K=1
DF=0
Keyscan ON
Release the power down mode
AC=00H
End
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 operated and initialization will not performed.
In this case the initialization by MPU software is required.
(2-2)Initialization By Hardware
The NJU6624C incorporates RESET terminal to initialize the all system. When the "L" level input over 1.2ms to
the RESET terminal, reset sequence is executed. In this time, busy signal output during 250us (fosc=145kHz)
after RESET terminal goes to "H". During this 250us period, any other instruction must not be input to the
NJU6624C.
-Timing Chart
External
RESET Signal
Over 1.2ms
Busy
250us
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet NJU6624C.PDF ] | |
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