UPD16431A NEC, UPD16431A Datasheet - Page 12

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

OUTPUT WAVEFORM
(1) 1/2 duty (1/2 dias)
12
SEG
SEG
1 KEY REQ
(w/key)
2 KEY REQ
(w/key w/o key)
3 KEY REQ
(w/o key w/key)
1
1
-COM
-COM
COM
COM
SEG
SEG
1
2
1
9
1
2
-1/2V
-1/2V
1/2V
1/2V
-V
-V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LC2
LC2
LC2
LC2
EE
EE
EE
EE
0
0
*
K
0
0
K
*
1
1
*
K
0
0
K
*
1
1
*
K
0
*: key scan period (16/fc)
PD16431A