NJU6538 Datasheet, PDF (1/27 Pages) New Japan Radio – 1/8, 1/9, 1/10 Duty BITMAP LCD DRIVER with KEY SCAN

NJU6538
PRELIMINARY
1/8, 1/9, 1/10 Duty
BITMAP LCD DRIVER with KEY SCAN
GENERAL 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-