NJU6539
PRELIMINARY
1/8, 1/9, 1/10 Duty
BITMAP LCD DRIVER with KEY SCAN
GENERAL DESCRIPTION
The
NJU6539
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
NJU6539
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 NJU6539 can select a LCD driving voltage out
of 16 steps voltage by the instruction adjust the display contrast of
LCD panel.
PACKAGE OUTLINE
NJU6539FG1
NJU6539FC2
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, 1/9 Duty, 1/10Duty
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, ADC Select, Inverse Display ON/OFF, whole display
ON/OFF, Reset, EVR Register Set, Duty Select, Power Save mode set, General Output Port set, General Output Port
PWM data set, PWM slope set, PWM program Execute, General Output Port / Key scan output select, Display
Data write,
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.2004-03-01
-1-
NJU6539
TERMINAL DESCRIPTION
No.
FG1
1 to 65
66 to 72
73 to 75
76 to 78
FC2
3 to 67
68 to 74
75 to 77
78 to 80
Symbol
SEG
1
to SEG
65
COM
1
to COM
7
COM
8
to COM
10
Po1 to Po3
I/O
O
O
O
O
Description
Segment output terminal.
Common output terminal.
Icon common output terminal.
General output port
128-step PWM waveform output by MPU control.
General output port / Key scanning input terminal
Select General output port or Key scanning input terminal by the
instruction.
A function must be selected either Po3 or S
0
General output port
128-step PWM waveform output by MPU control.
Key scanning input terminals
(No need for anti-reverse current diode in key scan)
79
81
Po4/S
1
O
80 to 83
84 to 88
89
90
91
92
93
94
95
96
97
98
99
100
82 to 85
86 to 90
91
92
93
94
94
96
97
98
99
100
1
2
S
2
to S
5
K
1
to K
5
V
DD
VLCD1
VLCD2
V
0
V
1
V
2
V
SS
OSC
RESb
CE
SCL
SIO
O
I
-
I
I
-
I/O
I
I
I
I/O
Key scanning input terminals.
(No need for anti-reverse current diode in key scan)
Key scanning input terminals.
(with internal pull-down resistor)
Power supply terminal.(
2.7V to 5.5V)
LCD driving voltage input terminal.
LCD driving voltage stabilization capacitor terminals.
Connect the capacitor between each terminal and Vss.
Ground terminal.
Osclator terminal.
Conect the external resistor.
Reset terminal. (with internal pull-up resistor)
In case of only Power-on Reset should be open.
Chip enable terminal
Serial clock input terminal
Serial Data input or output terminal
-4-
Ver.2004-03-01
NJU6539
APPLICATION CIRCUIT
V
DD
V
SS
*1
V
DD
V
SS
RESb
CE
SC
SIO
COM
1
COM
10
----
SEG
1
----
10com 65seg
matrix LCD panel
MPU
*2
V
LCD
*3
*3
*3
*3
*3
V
SS
V
LCD1
V
LCD2
V
0
V
1
V
2
NJU6539
SEG
65
General output ports
Po
1
Po
2
Po
3
Po
4
/S
1
V
SS
OSC
Po
4
/S
1
S
2
S
3
S
4
S
5
5 x5 key matrix *4
K
1
K
2
K
3
K
4
K
5
*1
*2
*3
*4
The rising time of Power source voltage at Power on and the falling time at Power off must keep over than 1ms because of
Voltage detection type Reset circuit operation.
SO terminal requires external pull-up resistor connecting to Power source of external MPU because of Open-drain type output.
This capacitor for bias voltage stabilization should be connected in accordance with display quality in application.
P
O3
/ S
0
terminal is general output ports and Key scan signal output duplicated-function terminals. A function must be selected
either Segment output or other.
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
Ver.2004-03-01
-5-
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