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PDF NJU6538 Data sheet ( Hoja de datos )
| Número de pieza | NJU6538 | |
| Descripción | BITMAP LCD DRIVER | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJU6538 (archivo pdf) en la parte inferior de esta página. Total 27 Páginas | ||
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NJU6538
PRELIMINARY
1/8, 1/9, 1/10 Duty
BITMAP LCD DRIVER with KEY SCAN
www.dataGshEeNet4EuR.coAmL DESCRIPTION
The NJU6538 is a 10-common x 65-segment bitmap LCD
driver to display graphics or characters.
It contains 650 bits display data RAM, microprocessor
interface circuit, common and segment drivers, key scan
circuit, and general output ports.
An image data from MPU through the serial interface is
stored into the 650 bits internal displayed on the LCD panel
through the commons and segments drivers.
The NJU6538 displays 10 x 65 dots graphics or
11-character 1-line by 5 x 7 dots character + 3 x 65 dots icons.
It contains key scan circuit transmitting the 25-keys maximum
(5 x 5 = 25) to MPU.
Also it provides 4 general purpose output ports with PWM
output function maximum to drive LEDs or others directly.
Furthermore, the NJU6538 can select a LCD driving voltage
out of 16 steps voltage by the instruction adjust the display
contrast of LCD panel.
PACKAGE OUTLINE
NJU6538FG1
NJU6538FC2
FEATURES
Direct Correspondence between Display Data RAM and LCD Pixel
Display Data RAM
: 650-bits
LCD Drivers
: 65-seg, 10-com
Serial interface (SIO, SCL, CS)
Programmable Duty Ratio
1/8 Duty
7-common x 65-segment + 1-icon common
1/9 Duty
7-common x 65-segment + 2-icon common
1/10Duty
7-common x 65-segment + 3-icon common
Bias Ratio
1/4 bias
25-key scan Function (5 x 5 matrix)
Needless for anti-reverse current diodes in key scan
general Output Ports with 128-steps PWM output (possible LED driving) maximum 4-ports
Useful Instruction Set
Display ON/OFF, Page Address Set, Column Address Set, Display Data write, ADC Select, Inverse
Display ON/OFF, whole display ON/OFF, Reset, EVR Register Set, Duty Select, Power Save mode set,
General Output Port PWM phase / frequency set, General Output Port PWM data set, General Output
Port / Key scan output select
Bleeder Resistance On-chip
Software Contrast Control (16 steps)
Operating Voltage
Logic Operating Voltage 2.7 to 5.5V
LCD Driving Voltage
5.0 to 10.0V
Package Outline
QFP100-G1
QFP100-C2
C-MOS Technology (Substrate: P)
Ver.2003-05-09
-1-
1 page  
NJU6538
FUNCTIONAL DESCRIPTION
(1) Description for each blocks
(1-1) Serial I/F
The serial I/F controls serial data from external data.
www.data(1sh-2ee)t4uI.ncsotmruction data buffer
The instruction data buffer stores instruction code from external.
(1-3) Instruction decoder
The instruction decoder decodes instruction code and controls each blocks.
(1-4) Display data RAM
The Display data RAM stores data for display from MPU.
(1-5) Segment driver
The Segment driver generates driving waveform to segment terminal on display data.
(1-6) General output driver
The General output driver generates output signal level to general output terminal on output data.
(1-7) Common driver
The Common driver generates driving waveform to common terminal.
(1-8) Electrical Variable Resistance (E.V.R.)
The Electrical Variable Resistance adjusts LCD driving voltage from V0 to V2.
(1-9) Key scan controller
The Key scan controller controls to input from external Key data.
(1-10) Key data buffer
The data buffer for key stores Key data until next key data is stored.
(1-11) CR Oscillator
The Oscillator is external connect resistor, which generates the master clock.
(1-12) Reset circuit
The Reset circuit is type of detectable voltage. It resets internal circuit when the power turns on or
drop the voltage.
Fig.1 Display data RAM (DDRAM) Map
Page address
D0=”0”
D0=”1”
Data
D0 J
J
D1 J
J
D2 J J
J
D3 J J J
D4 J
JJ
D5 J
J
D6 J
J
D0
D1
D2
Display Pattern
PAGE 0
PAGE 1
Column
Address
D0="0"
ADC
D0="1"
00 01 02 03 04 05 06
40 3F 3E 3D 3C 3B 3A
Segment Drivers 1 2 3 4 5 6 7
----------------
3F 40
01 00
64 65
Common
Drivers
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
COM9
COM10
Ver.2003-05-09
-5-
5 Page 
NJU6538
(m) General output port set.
This instruction sets the PWM value outputted from Po0 ~ Po3 terminals. The “General output
port select” instruction selects the general output port to output with PWM. The “General output port
PWM set” instruction sets the PWM value.
www.datasheet4u.comThe “General output port select instruction" and the “General output port PWM set instruction" is
not necessary to continuously perform. Because these instructions are independently.
1. General output port select.
This instruction selects the general output port to output with PWM.
A0 D7 D6 D5 D4 D3 D2 D1 D0
0011000
Port
D1 D0
00
01
10
11
Port
Po0
Po1
Po2
Po3
2. General output port PWM set
This instruction sets the PWM value outputted from Po0 ~ Po3 terminals.
The PWM output setting is available for 128-step at each port output terminals.
A0 D7 D6 D5 D4
D3
D2
D1
D0
0 1 0 0 0 PWMEN PWM6 PWM5 PWM4
0 0 1 1 1 PWM3 PWM2 PWM1 PWM0
A) PWMEN
0:Selected general output port is ”L” output.
1:Selected general output port outputs PWM depending on PWM data.
B) PWM6 to PWM0
PWM value:This register sets the duty value of PWM outputted from the selected general output port.
The PWM value set requires twice, which are upper 3-bit and lower 4-bit.
The PWM duty is (Register + 1 ) / 128.
Ver.2003-05-09
- 11 -
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet NJU6538.PDF ] | |
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