UPD16680 NEC, UPD16680 Datasheet - Page 9

• Manufacturer Part Number: UPD16680
• Description: 1/53/ 1/40 DUTY/ LCD CONTROLLER/DRIVER WITH BUILT-IN RAM
• Manufacturer: NEC

3.3 Driver System Pins
4. LCD DRIVING VOLTAGE CONTROL CIRCUIT
SEG
SEG
COM
COM
PCOM
AMP
AMP
AMP
Dummy
Pin Symbol
1
100
IN
IN
OUT
1
51
to
(+)
(-)
to
Segment
Common
Pictographic common
Operational amplifier input
Operational amplifier
output
Dummy pad
AMP
DA
IN(+)
CHA
Pin Name
AMP
IN( )
R
1
D/A
Converter
+
R
AMP
2
out
1, 2, 3, 9, 12,
15, 18, 21,
24, 28, 32,
33, 40, 44,
54, 76,
98 to 101,
113 to 116,
248 to 251,
263, 264
132 to 231
102 to 112,
117 to 130,
232 to 247,
252 to 261
C
131, 262
1
Pin No.
19, 20
V
16,17
13,14
LC1
Data Sheet S12694EJ2V0DS00
V
LC2
I/O
V
O
O
O
O
I
-
LC3
Reference power circuit
V
Segment output pins.
Common output pins
Common output pins for pictograph.
(Same waveform output from these pins.)
These pins are the input pins of operational amplifier for LCD
driving voltage adjustment.
When using the internal D/A converter, leave AMP
When not using the internal D/A converter, it is necessary to
input the reference voltage.
AMP
adjustment.
See 4. LCD DRIVING VOLTAGE CONTROL CIRCUIT.
This is the input pin of operational amplifier for LCD driving
voltage adjustment. Normally it is connected to the resister for
LCD driving voltage adjustment. See 4. LCD DRIVING
VOLTAGE CONTROL CIRCUIT. It recommends to connect to
this pin a 0.1 to 1 F capacitor to make the output of the
internal operational amplifier be stable.
Dummy pins are not connected to the internal circuit. Leave
open if they are not used.
LCBS1
IN(–)
V
LCBS2
is connected to the resister for LCD driving voltage
V
LCBS3
Function Description
V
LC4
V
LC5
V
SS
V
EXT
IN(+)
PD16680
open.
9