NJU6543 Datasheet, PDF (1/29 Pages) New Japan Radio – 1/2 1/3 1/4 Duty LCD Driver

Preliminary _NJU6543
1/2 1/3 1/4 Duty LCD Driver
! GENERAL DESCRIPTION
NJU6543 is a 1/2 or 1/3,1/4 duty segment type LCD driver.
It incorporates 4 common driver circuits and 128 segment
driver circuits. NJU6543 can drive maximum 256
segments in 1/2 duty ratio and maximum 384 segments in
1/3 duty ratio and maximum 512 segments in 1/4 duty
ratio.
In addition, the NJU6543's useful functions meet a wide
range of applications.
! PACKAGE OUTLINE
! FEATURES
NJU6543
# LCD driving circuit
:Max. 128outputs (4 outputs as for general purpose ports)
# Programmable Duty Ratio
1/2 Duty Ratio
:Driving max. 256 segments
1/3 Duty Ratio
:Driving max. 384 segments
1/4 Duty Ratio
:Driving max. 512 segments
# Programmable Bias Ratio
:1/2, 1/3 bias ratio
# Electrical Variable Resistance :8-steps
# Serial Data Transfer :Shift clock max. 2MHz
# Built-in Oscillator
:CR oscillation with external resistor and capacitance, or external oscillation
signal input
# Operating Voltage
# C-MOS Technology
# Package Outline
:3.0V / 5.0V
:P-Sub
:LQFP144 20mm*20mm t=1.7mm(max) Pin-pitch=0.5mm
! BLOCK DIAGRAM
VDD
V0
V1
V2
V3
VSS
TEST
OSC
COM1 COM4 SEG1 SEG8 SEG9 SEG16 SEG17 SEG24 SEG121 SEG125/P1 SEG128/P4
EVR
COM
Drivers
//
Segment Drivers /General Purpose Output Ports
//
Oscillator
Data Latch Circuit
Display Data Register
CSb
SCK
SI
RSTb
Decoder
Command Register
Power ON Reset Circuit
Ver.2008-11-28
-1-