UPD16675A View Datasheet(PDF) - NEC => Renesas Technology
Part Name
Description
Manufacturer
UPD16675A Datasheet PDF : 36 Pages
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µPD16675A
1.3 Driver System
Pin Symbol
Pin Name
SEG1 to
SEG128
Segment
COM1 to
COM32
Commons
PCOM1,
PCOM2
AmpIN(+),
AmpIN(−)
Pictographic
commons
Operational amplifier
input
AmpOUT
Operational amplifier
output
Pin No. I/O
Description
143 to 16 O
Segment output pins
3 to 8, O
152 to 156,
163 to 173,
232 to 241
151, 231 O
Common output pins
Common output pins for pictograph
183, 182 I
184
O
These are the input pins of the operational amplifier
for LCD drive voltage adjustment. Leave AmpIN(+)
open when using the internal D/A converter. When
not using the D/A converter, it is necessary to input
the reference voltage.
Connect AmpIN(–) to the LCD voltage adjustment
resistor (see the diagram below).
This is the input pin of the operational amplifier for
LCD drive voltage adjustment. It is normal to
connect this pin to the LCD voltage adjustment
resistor (see the diagram below).
It is recommended to connect approx. 0.1 to 1 µF
capacitor to this pin to stabilize the internal
amplifier’s output.
2. VOLTAGE CONTROL CIRCUIT EXAMPLE
DACHA
AmpIN( )
D/A
Converter
Reference Power Circuit
VEXT
AmpIN( )
AmpOUT
VLC1
VLC2
VLC3
VLC4
VLC5
VEE
R2
R1
C1
8
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