UPD16432B NEC, UPD16432B Datasheet - Page 26

• Manufacturer Part Number: UPD16432B
• Description: 1/8/ 1/15 DUTY LCD CONTROLLER/DRIVER
• Manufacturer: NEC

ACCESS PROCEDURES
1.
26
Access procedures are illustrated below by means of flowcharts and timing charts.
Initialization
(1) Flowchart
Display data RAM
write
Character display
RAM write
All data written?
All data written?
Address setting
Character data
Key scan start
Display data
Initial state
initialization
Start
YES
YES
NO
NO
Display setting command (command 1)
MSB
Status command (command 2)
MSB
Data setting command (command 3)
MSB
Address setting command (command 4)
MSB
Data setting command (command 5)
MSB
0
1
0
1
0
0
1
1
0
1
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
0
0
0
0
0
0
0
0
0
LSB
LSB
LSB
LSB
LSB
1
1
0
0
1
(1/15 duty, master, internal drive)
(LCD off, LED off, key scan operation)
(Display data RAM, increment)
(Display data RAM: 0H)
(Character display RAM, increment)
PD16432B