LCD Driver. NJU6541B Datasheet

NJU6541B Driver. Datasheet pdf. Equivalent

NJU6541B Datasheet
Recommendation NJU6541B Datasheet
Part NJU6541B
Description Static 1/2 1/3 1/4 Duty LCD Driver
Feature NJU6541B; Preliminary NJU6541B Static 1/2 1/3 1/4 Duty LCD Driver GENERAL DESCRIPTION The NJU6541B is a Stat.
Manufacture New Japan Radio
Datasheet
Download NJU6541B Datasheet




New Japan Radio NJU6541B
Preliminary NJU6541B
Static 1/2 1/3 1/4 Duty LCD Driver
GENERAL DESCRIPTION
The NJU6541B is a Static or 1/2,1/3,1/4 duty segment
type LCD driver. It incorporates 4 common driver circuits
and 120 segment driver circuits. The NJU6541B can
drive maximum 480 segments in 1/4 duty ratio, and can
use 3-Wire serial I/F.
In addition, the NJU6541B's useful functions meet a
wide range of applications.
PACKAGE OUTLINE
FEATURES
NJU6541B
LCD driving circuit
:Max. 120outputs (4 outputs as for general purpose ports)
Programmable Duty Ratio
Static
:Driving max. 120 segments
1/2 Duty Ratio
:Driving max. 240 segments
1/3 Duty Ratio
:Driving max. 360 segments
1/4 Duty Ratio
:Driving max. 480 segments
General Purpose Port :Driving max 4outputs (SEG1-SEG4:4outputs as for general purpose ports)
Key Scan Function
:Max 30Key(5-out x 6-in matrix)
Programmable Bias Ratio
:1/2, 1/3 bias ratio (Static:1/1)
Serial Data Transfer :Shift clock max. 2MHz
Oscillator
:CR oscillation with external resistor and capacitance, or external oscillation
signal input
Operating Wave Form :A wave form, B wave form
Electrical Variable Resistance :8-steps
Power ON Initialize Circuit On-Chip
Useful Instruction Set :Duty select, Bias select, Wave form select, Oscillation select, Segment or general
purpose ports select, Segment or Key scan output select, E.V.R select,
Display ON/OFF, Key scan ON/OFF
Operating Voltage
:3.0V / 5.0V
C-MOS Technology :P-Sub
Package Outline
:LQFP144 20mm*20mm t=1.7mm(max) Pin-pitch=0.5mm
BLOCK DIAGRAM
VDD
V0
V1
EVR
REQ S5 K1- K6 COM1
COM4
Key Scan
Common
Driver
SEG1/P1 SEG4/P4 SEG5 SEG115 SEG117/S1 SEG120/S4
Segment Driver
V2
Latch
V3
VSS
OSC
SIO
CSb
SCL
RSTB
TEST
OSC
Serial I/F
Display Reg
Decoder
Command Reg
Power ON Reset
Ver.2013-04-19
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New Japan Radio NJU6541B
NJU6541B Preliminary
PIN CONFIGURATION
QFP144
109 SEG105
110
111
112
113
114
115
116
117
118
119
120 SEG116
121 SEG117/S1
122 SEG118/S2
123 SEG119/S3
124 SEG120/S4
125 S5
126 K1
127 K2
128 K3
129 K4
130 K5
131 K6
132 V0
133 V1
134 V2
135 V3
136 VSS
137 OSC
138 TEST
139 REQ
140 RSTb
141 CSb
142 SIO
143 SCL
144 VDD
NJU6541B
SEG68
SEG67
SEG66
SEG65
SEG64
SEG63
SEG62
SEG61
SEG60
SEG59
SEG58
SEG57
SEG33
72
71
70
69
68
67
65
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
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Ver.2013-04-19



New Japan Radio NJU6541B
Preliminary NJU6541B
TERMINAL DISCRIPTION
No. Pad Name
Function
144 VDD Power supply: 3V /5V
132
V0
LCD driving voltage
V0 VDD
133 V1 Bias
134 V2
135 V3
At 1/3 bias ratio, keep V2- V3 open.
At 1/2 bias ratio, short V2- V3.
136
VSS
GND
VSS =0V
137
OSC
External resistor and capacitance connection terminal for CR oscillation, or
external clock input terminal
138
140
143
142
141
139
126~131
125
121~124
1-4
9~120
5-8
TEST
RSTb
SCL
SIO
CSb
REQ
K1 ~ K6
S5
SEG117/S1 ~
SEG120/S4
COM1 ~ COM4
SEG5 ~ SEG116
SEG1/P1~SEG4/P4
TEST
Keep TEST-VSS short
Reset
When RSTb is “L", command register and latch circuit is reset.
When this terminal is not used, should be VDD short. (keep power supply
condition when hardware reset circuit is used)
Serial data Transmission clock input
Serial data I/O terminal ( Pull-up R ).
Chip select
When CSb is “L”, data can be read in.
Request operation outputs for Key scan
Key scanning inputs
Key scanning output
Segment driver outputs / Key scanning output
These 4 terminals can be used as segment outputs or Key scanning
output terminal by the instruction.
Common driver outputs
Segment driver outputs
Segment driver outputs/general purpose output ports
These 4 terminals can be used as segment outputs or general
purpose output ports by setting Command Register.
When selected as general purpose ports, data can be outputted via
these ports during COM1 timing.
According to transferred data, "H"=VDD or "L"=VSS will be outputted.
Ver.2013-04-19
-3-







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