UPD16430A NEC, UPD16430A Datasheet - Page 7

• Manufacturer Part Number: UPD16430A
• Description: 1/2/ 1/3/ 1/4 DUTY LCD CONTROLLER/DRIVER
• Manufacturer: NEC

Display RAM Addresses and Display Dots
of a group address transferred at one time.
(1) 1/2 duty
(2) 1/3 duty
(3) 1/4 duty
address
address
address
Display RAM temporarily stores display data that has been sent serially.
Display RAM addresses are allocated in units of 8 bits (group address), and it is possible to store the display data
The relations between group addresses and display dots for the three display modes are shown below.
Remark During auto incrementing, incrementing past the last group address of each duty (for example group
COM3
COM2
COM1
COM0
COM2
COM1
COM0
Group
COM1
COM2
Group
Group
3
2
1
0
2
1
0
1
0
0
address 14 in the case of 1/2 duty) brings the counter back to “0.”
0
7
6
5
4
5
4
3
3
2
0
5
4
7
6
1
7
6
1
2
The shaded parts are always 1.
1
3
2
4
2
5
3
6
4
7
3
8
5
9
4
18 19 20 21 22 23 24 25
12
9
13
10
14
11
15
26 27 28 29
16
12
17
PD16430A
13
18
14
19
7