UPD16431A NEC, UPD16431A Datasheet - Page 11

• Manufacturer Part Number: UPD16431A
• Description: 1/2/ 1/3/ 1/4-DUTY LCD CONTROLLER/DRIVER
• Manufacturer: NEC

OUTPUT SELECT VOLTAGE
1. COM
2. SEG
When selected
When not selected
When key scanned
When selected
When not selected
When key scanned
When selected
When not selected
When key scanned
When key not
scanned
When selected
When not selected
When key scanned
When key not
scanned
1/2 V
1/2 V
V
V
V
V
1/2 V
V
V
V
V
1/3 V
V
V
GND
GND
V
V
GND
GND
V
GND
GND
2/3 V
V
GND
GND
V
LCD
LCD
LC2
LC2
LCD
LCD
LC3
LC2
LCD
LCD
LCD
LCD
LC1
LCD
LCD
+
+
LCD
LCD
LCD
LCD
LCD
GND
GND
1/2 V
V
1/2 V
V
GND
GND
2/3 V
V
1/2 V
V
V
V
GND
GND
V
V
GND
GND
V
V
1/3 V
V
V
V
GND
GND
LC2
LC2
LC1
LC2
LCD
LCD
LCD
LCD
LCD
LCD
LC3
LCD
LCD
–
–
LCD
LCD
LCD
LCD
LCD
1/2 bias
1/3 bias
1/2 bias
1/3 bias
Bias
Bias
Top
Bottom: with external power supply
: with internal power supply
PD16431A
11